Investigating Magnetic Pendulum Essay Example

Investigating Magnetic Pendulum Paper Every magnet has two poles, North and South. When it is hung freely, it always settles in the direction North and South of the Earth. The following experiment is about the properties of magnetic pendulum. In all experiments find the time period of oscillation, and find relation in the direction of vibration and the time period of pendulum. Hypothesis: The effect of changing the vibration direction of magnetic pendulum on time period of the 20 constant oscillations. Apparatus: 1. Color indicated lab magnets 2. Strings and threads 3. Solution Tape (Transparent) 4. Measuring Scale (1 feet) 5. Set of compasses 6. Lab stand 7. Stopwatch 8. Scissors Methodology: A For Single magnetic pendulum investigation: 1. Hang a bar magnet horizontally using the thread string, tied in balance with the lab stand. The thread should be strongly tied with the magnet stand. 2. Make sure the magnet is not rotating from its point of centre. This is done in order to allow precise timed readings, as the oscillation progresses smoothly. 3. Use two or more compasses to check the North. Keep the compasses at a 1 meter distance from the magnets to avoid unnecessary deflection 4. Vibrate it in the direction as shown in the diagrams below. 5. Repeat steps 1-2 for varying directions Note: The side view of all direction combinations is in the horizontal plane. The top view uses vertical and horizontal terms in its own respective sense i. e. the as viewed from the birds eye projection. Part 1: Constant: 20 oscillations Distance of the string i. e. from the tied knot of the stand to the magnet = 6 Variables: Time (seconds) and Direction (arrow) of magnet pendulum swings We will write a custom essay sample on Investigating Magnetic Pendulum specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Investigating Magnetic Pendulum specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Investigating Magnetic Pendulum specifically for you FOR ONLY $16.38 $13.9/page Hire Writer In part 1 of the investigation, the magnet will be swung across constant amplitude with the constant no. of 20 oscillations. With each changing direction, the time period for the 20 oscillations will be noted down on paper. Then, the readings will allow us to deduce if the changing direction of magnet has an effect on the time period or not. Below are the four directions, named A, B, C and D along their time period readings. As per the results of the investigation, the change in the direction of vibration of the magnet for 20 oscillations does not affect the time period of the oscillation. As we can see he comparison chart above, the values for directions A, B, C and D are almost same, with very minuscule micro second differences. The possible uncertainty here can be human error in timing the experiment and secondly, the quality of magnets i. e. minor change in size and weight. Moreover, the balance of the string attached was not at most in perfect form, hence the unnecessary rotating of the magnets from the point of tied knot must have affected the time period readings. Hence, the part 1 of the investigation comes to suggests that the change in direction of the vibration of the magnet does not affect the time period of the oscillations. Part 2: Pole Combination A Methodology: B For Dual magnetic pendulum investigation: 1. Hang a bar magnet horizontally with the help of two strings. 2. Now put another magnet just below the hanging magnet, in the same direction as the hanging magnet, with similar poles facing each others. 3. Using the thread string, tied in balance with the lab stand. The thread should be strongly tied with the magnet stand. 4. Make sure the magnet is not rotating from its point of centre. This is done in order to allow precise timed readings, as the oscillation progresses smoothly. 5. Change the distance between the two magnets, keeping the oscillations constant at 20 and then note the change in the time period. 6. Now, vibrate the magnet (for different directions) with small amplitude, first along the length then along with width. Measure the time period of vibration. Also find the rate of decrease in the amplitude of vibration. 7. Repeat 1-6 for varying direction combinations. As per the results for part 2 of the investigation, we put hanged a magnet of the same size as used in part 1 of the investigation by a tied string, making it a dynamic object. Then, we placed a stationery magnet of the same size below it. As we vibrated the dynamic magnet along its width, we slightly altered the distance between the stationery magnet and the dynamic magnet to see if had affect on the oscillations time period. Now, the interesting part of the investigation arises. As you can see from the comparison chart of the same pole combination of N-N to S-S, a slight change in distance between the two magnets, that is a (1.6 minus 1. 0 = 0. 6 cm) 0. 6 cm change brings a 2. 0+ second change. The increase in the distance between the two magnets increases the time period for the 20 oscillations. The theory behind this is simple. As the two magnets move closer to each other, they face a higher amount of N to N and S to S repulsion, so they are pushed with a greater force than they would be when they would be apart (as the case is for d=1. 6 cm). This in result decreases the time period, as the 20 oscillations are completed in a lesser time period.

bad science essays

bad science essays I have a cousin who's little girl, Christina was born mentally impaired; she, at the age of 7 has no mental functions despite those of a very basic nature. She has total congenital hearing failure; she cannot speak. It is incredibly frustrating to communicate to this unfortunate waif of a child. To supplement the ever increasing costs of care for her, my cousin and her husband have agreed to, on alternate weekends provide a medical lab with a fascinating research subject; a real live little girl. Last weekend, they inserted a tube into her throat via an incision, and fed her with poisonous chemicals until she convulsed. One summer afternoon, she was restrained to a surgical table, and had her skull split open and vital nerves disconnected-just out of curiosity. She was temporarily blinded from this experiment. They like to starve her half to death to see how she will react; one time they locked her in a cage that was electrically wired to shock her when she moved- behavior modification they called it. She now is suffering from a deadly virus she has been injected with. Well, they reason, she can't speak to us, she can't understand us when we speak to her, she'll certainly never go to college, give us beautiful, normal grandchildren....who's really being hurt here? If she were in pain, she'd tell us. Well, obviously, this is a gross exaggeration. This will never happen to a human child. We are sacred. This is life you may not touch with a surgical instrument for no reason. This is life that may not be poisoned to death, slowly, or tortured in a sadistic laboratory ritual. World-renowned lecturer and author Peter Singer refers to this as "speciesism". Inflicting pain on a living creature, and then justifying it because it is not a human being. These atrocities happen hourly. Household names, protectors of our hardwood furniture and patrons of our tartar-free smiles inflict this agony with our consent to puppi...

MBA Markeing Communications Essay Example | Topics and Well Written Essays - 1000 words

MBA Markeing Communications - Essay Example hand even cheaper products sometimes move rapidly in the market because of the strong marketing communication between the manufacturer and the consumers. Marketing people have many weapons like advertising, branding, direct marketing, graphic designs, packaging, sponsorship, public relations, sales promotion online marketing etc in their armoury to communicate effectively with the market. This paper briefly analyzes Sales Promotion as an integrated marketing communication strategy. Sales promotion is an activity intended for increasing the sale of a product undertaken by organization. It can be of different types based on the market and the product specialties. It is difficult to pin point all the sales promotion activities because of the high volume of creative and innovative sales promotions are entering in the market daily. Manufacturers spend millions of dollars in researching for new methods in sales promotion since they know very well that the traditional sales promotions may not attract the customers much. ‘Buy-One-Get-One-Free (BOGOF), Customer Relationship Management (CRM), New media, Merchandising, Free gifts, Discounted prices, Joint promotions, Free samples, Vouchers and coupons, Competitions and prize draws, etc are some of the common sales promotion methods’ (Sales Promotion, 2009). â€Å"Buy-One-Get-One-Free† is a common sales promotion campaign undertaken by marketing people. The consumers will be offered another one when they purchase one, free of cost in this type of sales promotion strategy. In customer relationship management, the consumers will get bonus points for every product they purchased or service they used which can be later converted in purchasing another product or service later. For example, most of the airliners offer the passengers bonus points for the air miles they travelled in their aircrafts which can be later converted to another free trip. Free gifts are another method for attracting customers. When we purchase a car,

Free Economic Zones in Transition Economies and Its Impact of Economic Essay

Free Economic Zones in Transition Economies and Its Impact of Economic Development of a Country - Essay Example e areas of a certain national economy where the government has put up a special system of opportunities and benefits that are not available to other areas of the country.3 These zones are also referred to as â€Å"islands† or â€Å"windows† wherein foreign investments and technologies are presented to a country. They are an example of an â€Å"open door† policy.4 Another definition of FEZ presents it as a part of a country’s territory wherein goods are being looked at as something that does not fit the limits of national customs territory; thus, they are not under common customs control and taxation, according to the Kyoto Convention. Hence, products being entered through the FEZs are not subjected to any trade barriers. The Ministry of Finance and Economy of Korea also gave their own definition, stating that FEZs are self-sufficient areas that provide wide-ranging services.5 Consequently, the Free Economic Zone Law defined FEZ with Article 23 as â€Å"th e zone, which is developed with the aim of improving the business environment for foreign-invested enterprises and the living conditions for foreigners†. Thus, an FEZ is a special area where exceptional measures are practiced. Moreover, it is a specific area which offers an optimal business and living environment to foreign investors and enterprises in order to draw high-end foreign industries and global services.6 FEZs are similarly known as free zone (FZ), free port (FP), customs free zone (CFZ), EPZ, foreign trade zone, free production zone (FPZ), FTZ, industrial free zone, tax free zone, customs free airport and foreign access zone.7 FEZs are also areas characterized as a part of a national economic area rather than a geographic territory where preferential economic conditions are being imposed with respect to entrepreneurs.8 Thus, others regard FEZs as a means of selective reduction of the state’s power to interrupt with economic processes. FEZs are referred to as devices that are capable of

Applied Marketing Management Essay Example | Topics and Well Written Essays - 2000 words

Applied Marketing Management - Essay Example The report discusses and analyse the overall brand management at Marks & Spencer. This report starts with a brief history and Marks & Spencer and about Marks & Spencer's brand and then extends further discussing its advertisement, brand equity, positioning etc. Main information is gathered through the internet and magazines and the analysis is also done with the help of the above mentioned sources. In the end recommendation are also given in the light of the discussions throughout the report. Marks & Spencer commonly known "M & S" is one of the top British retailer companies. It is ranked amongst the most prestigious chain of stores in the UK and is the largest clothing retailer in the UK by turnover. It also is a multi-billion pound food retailer. Most of its shops sell both of these categories. Marks & Spencer also has a third product line related to home wares such as bed linen, but this is far smaller than the other two. For much of the 20th century M&S was regarded as the leading retailer in the United Kingdom, and an icon of British business. ... In 1997 it became the first British retailer to make a profit before tax of over 1 billion, though within a couple of years it plunged into a crisis from which it has not yet fully recovered. It is now less than one quarter of the size of the UK's largest and most profitable retailer, Tesco. In 2006, M&S has opened a Technology Department in each flagship Store (http://www.marks-and-spencer.co.uk). Branding history of M&S: In the late 1990s, The St Michael brand was discontinued in favour of Marks & Spencer. When Stuart Rose took over in 2004, he introduced a new promotional brand under the "Your M&S" banner, with a corresponding logo. This has now become the company's main brand in its advertising, online presence and in-store merchandising. The clean font and modern colours of the new image are somewhat incongruous alongside the traditional M&S signage and associated fittings that still adorn the stores themselves. In fact the only thing they have in common is the use of M&S traditional green in the ampersand of the new logo. This may seem confusing at first, but the new look has been instrumental in the company's recent resurgence, particularly with the success of a new clothing campaign featuring the legendary model, Twiggy, and younger models associated with the bohemian styles of 2005-6, and the TV ad campaign for their food range featuring Dervla Kirwan and the tagline "This is not just food, this is M&S food". In 2006, "look behind the label" slogans were introduced by M&S and have been extremely successful. Fair trade clothing and foodstuffs are rolled out by all stores and all coffee and tea served in store cafe's are fair trade. Fishing is good for the environment also, so is the way that stores manufacture goods and recycle all of their waste

Political Change in Europe in the Modern Era Essay examples -- World E

European nations gained world dominance between the 15th and 19th centuries through imperialism and industrialization. European nations competed among themselves for international influence, and established by the early 20th century a very intricate balance of power, the disturbance of which ignited World War I in 1914. Over this same period, the power of monarchs within European nations declined as a larger portion of the populace demanded political rights, leading to the democratization of most political systems throughout Western Europe. These shifts in political systems were fed by urbanization, by the rise of class consciousness within the masses, and by the spread of ideas of political and economic philosophers who challenged the power of autocratic government. Russia from Tsarism to Bolshevik Dictatorship Russia lagged behind Western Europe in its economic and political development. In the mid-19th century, Russia remained a feudal society with very little industrialization or urbanization, whose tsar had absolute power. Serfs, peasants who were bound to landowners and had no political rights, comprised the vast majority of the population. Tsar Alexander II (1855-1881) initiated an Age of Reform that he hoped would modernize Russia while maintaining the absolute power of the tsar. In 1861 Alexander II emancipated the serfs, on the grounds that â€Å"it is better to abolish serfdom from above than to wait until the serfs begin to liberate themselves from below.† This act put into place a complicated system by which the peasants acquired a â€Å"temporary obligation† to the landlord that could drag on for years, and had to pay to purchase land that they had considered their own and that was often much smaller than the am... ... of the tsar in the late 19th century until the establishment of the Bolshevik dictatorship in October 1917. The moderate pro-monarchist factions (â€Å"whites†) and the Bolsheviks (â€Å"reds,† renamed the Russian Communist Party in 1918) engaged in a Civil War until 1922, by which time the RCP had defeated the monarchists and reclaimed the border nations that had been part of the Tsar’s empire, with the exception of Poland, Finland, and the Balkan states. With these victories the RCP established the Union of Soviet Socialist Republics (USSR), which became a powerful contender in world affairs under Stalin’s rule (1924-1953). The ideological and practical disconnect between Russian Communism and Western Democracy and the alliances of World War II were the foundations of the Cold War rivalry between the world’s two superpowers in the 20th century, the USSR and the USA.

Categories Of Carbon Steel Their Compositions Engineering Essay

‘STEEL ‘ is used for assorted metals of Fe. These vary from each other depending on the content and % of stuff added to the Fe base solution. On must maintain an of import factor in head, all steels contain a % degree of C + Manganese + Silicone + Sulpher. By increasing C to establish solution the stuff will increase strength and hardness therefore improves drastically the harden-ability. On the other manus C reduces the capableness of weld-ability and increases crispness. Several types of steels exist in our markets, the most common being ; field C, chromium steel, alloyed and tool steel. Carbon steel is one of the largely used steels in several industries. As explained antecedently, its belongingss are dependent largely on the % of C added but the other elements have minor influence excessively. One of import factor sing Plain Carbon Steel, is that this is a type of steel incorporating up to 1.5 % of C. One must foreground that most of the C add-ons in C steel are less than that of 1 % . Some applications of these steels are structural beams, auto frames, etc. ( Capudean, 2003 ) ( Iron Making & A ; Steel MAking, 2008 ) ( Jr. , 2007 ) Harmonizing to the ‘Steel Classification Society ‘ , Carbon steels are sub divided into four chief classs ; – Low Carbon Steels /Mild Steels ; these steels have less than 0.25 % of C, and these are the largely used class of C steels. Normally this type being unresponsive to heat interventions, intended to organize a martensitic construction, beef uping is achieved by cold working the portion due to low C content. These are really easy to organize steels with accomplishing popularity largely for not high strength applications. Some belongingss are ; Very tough, inexpensive sing costs ( least expensive to bring forth ) , they are easy machined ( more ductile than high C steels ) and welding belongingss are besides really good. Typically these have 275MPa – output strength, 450 – 550 MPa – tensile strength, and 25 % EL – Ductility. For such a ground, these are normally used in applications as Bridgess due its ability to deform under burden and return to its original. ( B ) ( Capudean, 2003 ) ( Groover, 2010 ) Degree centigrades: UsersNathanielDesktopRoadRailBridges.gif Medium Carbon Steels ; incorporate 0.25 % up to 0.55 % C. When it comes to belongingss, increasing C besides means a direct influential addition in hardness + tensile strength. On the other manus this besides effects severely the ductileness which makes it more hard to machine. Heat intervention to really thin subdivisions can better such machinability issues. These may be austinized by slaking and annealing afterwards to better such belongingss. These are comparatively stronger than the old class, whilst weaker than the high C steels. One common application of medium C steel is the production of crankshafts where high strength and stiffness is required to defy high tonss and opposition to tire when it comes to uninterrupted tortuosity and bending. Typical values are, 450-580MPa – output strength, 600-750 MPa – tensile strength, and 20-30 % EL – Ductility. ( Corus, 2010 ) ( Jr. , 2007 ) ( Iron Making & A ; Steel MAking, 2008 ) Degree centigrades: UsersNathanielDesktop1108phr-03+383ci-small-block-chevys+pistons-and-crankshaft.jpg High Carbon Steels ; incorporate 0.6 % up to 1.4 % of C. In a heat treated status it is able to defy high shear and wear hence, these are used in applications where stiffness and hardness play an of import portion such as in rope wire, besides good in prolonging crisp film editing borders. Unfortunately, these are the least malleable and really difficult to weld, in fact preheating and station warming ( commanding of chilling temperature ) is critical in order to obtain good welding sections and accomplish good mechanical belongingss. Since at their maximal hardenable conditions, these are the most brickle devising this a large drawback for this steel. ( B ) ( Jr. , 2007 ) ( Groover, 2010 ) Degree centigrades: UsersNathanielDesktopwire-rope2.jpg Very High Carbon Steel / Tool Steels ; are a ‘sub group ‘ of high C steels and contain lower limit of 0.8 % C. These have weak welding belongingss and ductileness, but are really good when it comes to strength, hardness and wear opposition that ‘s why it is really normally used in centre clouts. An of import factor for these sorts of steels is that most of them are used in a hard-boiled + tempered status. ( Jr. , 2007 ) ( Groover, 2010 ) Degree centigrades: UsersNathanielDesktop oolsteel.jpgP7: Question 2Select an industry and supply a brief over position of one metal forming technique used.The preciseness metal organizing procedure I will be discoursing is the Powder Formation ( PM ) . This gives an alternate cost effectual range towards stomping, hammering, machined parts and projecting. This is characterized one of the most enforced preciseness metal organizing technique in the modern industry and it is normally found in the automotive industry. Most vehicle parts presents are produced by such a procedure. PM combines pulverization compression with optimum physical belongingss with controlled high temperatures atmosphere sintering. ( Turkish PM ) Degree centigrades: UsersNathanielDesktopimage001.gif Such a procedure offers ideal benefits that you can non accomplish with using other metal working procedures. Mentioning merely a few, it is really material efficient since the finished portion uses 100 % of the stuff, whilst in other organizing techniques one will hold wastes. The procedure is really good in making intricate forms with minimum cost add-on. Some illustrations could be splines, cogwheels, away centric parts, etc ) . Sometimes this besides reduces assemblies since most of the assembly parts can be produced in a individual formation by PM. The PM clouts and rods produce parts with closer tolerances. A assortment of standard metals are specifically suited for PM processing, nevertheless intermixing can be easy done to run into specific belongings demand. Automatic rhythms make the PM procedure really labour efficient. The lone back draw is to put up the parametric quantities for the tooling, but as this is done, the procedure can bring forth parts at a really efficient r ate. High temperature Powder Metal ( HTPM ) , is able to accomplish 88-96 % of the material theoretical denseness. Since every stuff belongingss depends on denseness ( elongation, output strength, etc ) , HTMP outperform other procedures. ( GT.b, 2012 ) ( J, 2011 ) ( Marciniak, 1988 ) The high temperature metal pulverization procedure is divided into 4 chief sectors ; Blending – here high pureness metals pulverizations and additives are studied so funneled down to choose the optimal pick for the application in order to run into the coveted belongingss to the application. For illustration in the automotive industry, this procedure is used to organize panels. Here aluminum pulverization with anti oxidation additives and silicone for elastic belongingss are added in order to organize the ideal mixture for the door panel. All the pulverizations are assorted with particular lubricators which helps treating the pulverization flow. As mentioned before, blending the pulverizations in a solid province provides new chances to come up with new belongingss unique merely to HTPM. Compacting – Powdered metal is fed from a hopper into a provender shoe. The provender shoe delivers it into a die pit. Here multiple pulsations compress it into 50 % of its original capacity. Second strength packing forces realign and deform the atoms whilst implementing local mechanical bondings organizing a portion known as ‘a green portion ‘ . These are ejected carefully by automated machines and conveyed to the following measure. Compacting imperativenesss vary from 5 up to 900 tones and are capable of multiple gestures. Sintering – this involves puting the green portion in temperatures above 1300AÂ °C ( but below runing points ) . By such a procedure a batch of benefits are achieved, metallurgic bonding is enhanced, ductileness and stamina are besides improved. The initial art of the procedure cleans lubricators and surface of the metallic atoms to guarantee perfect mechanical belongingss sing the finished constituent. At the 2nd portion of this procedure ( go forthing portion in high temperatures ) , this allows energy to transform mechanical bonds to metallurgical bonds. Completing – sizing / coining are post operations that can be used for more complicated and minor tolerance dimensions, ( illustration – engine parts like cylinder valves, linking rods, etc ) . Extra coating assets could be milling, crunching etc. From here it can come on to a connection procedure. After joined this can besides be heat treated and plated. Heat intervention goes up to 550AÂ °C to do a bed of Fe3O4A which acts as corrosion resistant, and increase in hardness. ( N.A. ) ( GT.b, 2012 ) ( J, 2011 ) ( Marciniak, 1988 ) Note- A presentation will be held in category explicating the procedure in more item. Degree centigrades: UsersNathanielDesktopcycle.jpgP8: Question 3Distinguish between merger & A ; non merger, besides select one procedure and discuss. Finally supply one application and besides discuss.Welding is a procedure to bring forth high strength lasting articulations between two ( or more ) parts that need to be connected with each other by agencies of a weldment ( metallurgic fall ining subdivision ) . There are assorted ways to obtain such a connexion and with today ‘s engineering we are accomplishing better belongings results when it comes to post welding belongingss. Chiefly the procedure involves heating a portion, runing the portion / base metal ( depending on which procedure is adopted ) and connection of the stuff occurs as temp start to chill down. Thus the procedure required relies chiefly on the application of heat and force per unit area. One common welding factor is that the metallurgic construction of any metal will be changed station to welding. This coul d take to a station welding heat intervention procedure. ( T, 2010 ) ( Key to metals, 2007 ) Welding is divided into two chief groups, depending on the physical province of the base metal during the procedure that of the base metal being in liquid province or in solid province. These procedures are better known as merger and non merger welding techniques. In order to choose which welding procedure demands to be selected one should first analyze both the welding procedures and addition information sing pre dyer's rockets and station dyer's rockets. ( YAÂ ±lmaz, 2007 ) Fusion / Liquid State Welding ; this is the most common type of welding found in the industry due that the dyer's rocket produced is really strong. In this sort of fall ining procedure, the base metal is melted in order for the dyer's rocket to happen. Apart from the heat beginning a filler stuff ( consumable electrode ) may be fed besides into the welding pool. This procedure may besides utilize a protective bed between our environing atmosphere and the liquefied metal ( gas shield or flux ) . This protection consequences in a scoria on top of the welded seam which subsequently on solidifies and can be removed. There is a assortment of merger welding processes that can be used holding a different belongings result. ( Marinov ) Three major classs of merger welding are found which are bomber divided into different procedures ; Arc Welding: in this sort of procedure warming and thaw of the stuff is done by an electric discharge. Some illustrations of discharge welding could be ; Shield metal discharge welding, , Gas tungsten arc welding, Plasma discharge welding, Gas metal discharge welding, Flux cored arc welding, Submerged discharge welding, Electroslag welding. Gas Welding ; for this sort of welding the gas produces a fire that melts the basal stuff. An illustration of such procedure is ; Oxyacetylene welding High energy beam welding ; here a high energy beam is shot between the two parts held together under force per unit area. As the temperature starts diminishing after the beam Michigan, the parts start to bond together. Some illustrations of this procedure are ; Electro beam welding & A ; Laser beam welding. Basically all the procedures reference antecedently for merger has the same principals. A heat / energy beginning is concentrated on a really little country and a weld pool is produced. These heat beginnings for merger are arc, high energy beams and gas. Obviously the power denseness rises from gas fire to an electric discharge to a high energy beam. For the classs mentioned below we can analyze a graph demoing the heat input to the work piece vs power denseness of heat beginning. It is reasonably obvious that as the power of the heat beginning additions, the heat input to the welded portion decreases. Therefore the less the power denseness of the beginning the larger the affected country. Excessive clip for heating can do harm to the work piece, by changing the belongingss including deformation and weakening. ( Schwartz, 1979 ) Degree centigrades: UsersNathanielDesktopUntitledff.png Therefore one of the advantages on power denseness increaser is deeper incursions, optimum welding qualities, and less exposure clip for the welded portion. This procedure is besides various, and adaptable for confined infinites. On the other manus some disadvantages are, it is non every bit productive as uninterrupted wire applications, current bounds are critical to find the joint potency. ( Liverpool, 2000 ) Non Fusion / Solid State Welds ; for this type of welding heat is applied merely for the base metal to soften in its solid province in order to ease fictile distortion or rush up the solid province diffusion. As the name provinces, in non merger welding the stuffs are joined together without the demand of runing the base metal. Here the stuffs to be joined are brought together at equilibrium spacing for fictile distortion through high temperatures ( below runing point ) and force per unit areas. Some of the chief non merger welding techniques are ; Cold welding: In this procedure the dyer's rocket is achieved by the force per unit area and little lift in temperature due to cold working. Some typical illustrations are ; Press welding & A ; Roll Welding. Clash welding: For this procedure the dyer's rocket is achieved due to the heat produced due to using force per unit area between the parts i.e making clash. Some illustrations are ; Radial Friction welding & A ; Orbital Friction Welding. Diffusion Welding: here both parts are held together under changeless force per unit area, promoting the temperature somewhat and left invariable for a peculiar clip frame ( depending on the stuff ) . Some illustrations are ; Conventional Diffusion welding & A ; Deformation Diffusion welding Solid State Deposition Welding: Chemical reaction bounding. Degree centigrades: UsersNathanielDesktopspwmtfeb2001f1.jpg The first advantage of such a procedure is that low heat is required, hence minimum disruptors in crystalline construction are noticed since no thaw temperatures are required. This could besides be applied for stuffs within the same category or even within different categories due that no intermixing is involved. The chief disadvantage is that for such a procedure big, fixed machineries are required and this is a consequence for big capital financess to purchase the equipment required. Another disadvantage is that this procedure is non really feasible to be applied for little graduated table applications since its complicity. ( Jr, 2004 ) ( Lancaster, 1999 ) Describing one peculiar welding method, the method I will be discoursing is the ‘Hyperbaric Welding Process ‘ normally known as under H2O welding. This procedure falls under the class of Fusion welding. This is a really good illustration of welding in an unusual, critical environment. For such a procedure the welder must be an A class welder plus a commercial frogman in order to defy the harsh and unsafe sea conditions nature has to offer. ( Mukund, 1974 ) Degree centigrades: UsersNathanielDesktop2071602_f520.jpg In order to delegate instantly the procedure with an application mentioning advantages, disadvantages, equipment, restrictions and safeguards, the underwater welding is a procedure used in the offshore industry. The offshore industry covers the fixs of vass ( any kind ) , boring platforms ( jack up rigs, semi submergible rigs, self propelled rigs ) , Bridgess, etc. These constructions face terrible conditions conditions and are invariably flexing in multi conditional environments, hence the hazard of harm and failure is far greater. Basically this sort of welding is ideal and it is really flexible since the work could be done under the water line, therefore the natation works could be repaired in place without the demand of docking the platform to obtain dry conditions. This consequences in less sweeps and loss of valuable boring clip. Restrictions of such a procedure for our boring platform application are that the system is necessarily bulky and expensive to run. For such an application normally low to intercede C steels are used. Steels are designed as CT and a figure after to demo the C content. The most common steel found in this industry is CT3. Low and intermediate C steels are ideal since these have high malleability and sensible dyer's rocket ability. A The weld ability of depends on their C + manganese content in concurrence with their dross degrees. At low C degrees that of less than 0.15 % , the steels are non difficult and the dyer's rocket ability is excellent.A For the medium C type, 0.30 – 0.60 % C is found and these can be welded easy by agencies of discharge welding. Unlike the surface normal discharge welding, where such intermediate C have higher hardness and martinsite formation, in dry conditions pre warming and station warming are required. For deep sea dyer's rockets alternatively of pre warming and station warming, the dyer's rocket is non performed at one spell but with intermediate intermissions. ( Martikainen ) ( Sacrificial Metal, 2012 ) Degree centigrades: UsersNathanielDesktopcorrosion_drill ( 1 ) .jpg Basically there are two categorizations to execute submerged welding. The choice of the proper method is selected after an submerged structural / hull study and the parametric quantities of the submerged environment. The welding categorizations are ‘Dry Welding ‘ & As ; ‘Wet welding ‘ . Wet Welding ; here the welding is performed to the direct exposure of the wet conditions. Here the ‘Manual Metal Arc ‘ procedure is used. The principals of such a procedure are fundamentally the same as that of Arc Welding on dry land but in this instance a particular H2O cogent evidence electrode is required in order to protect the electrode ‘s nucleus. This is the most efficient and cost effectual welding method found amongst all under H2O welding. For this method the power supply is located on the surface of the H2O ( dry conditions ) and the overseas telegrams and hosieries are fed to the frogman via overseas telegram defenders ( big flexible piping ) . The power supply provenders direct current ( DC ) 300 – 400 As through overseas telegrams with negative mutual opposition. If positive mutual opposition is used in DC electrolysis will occour and causes rapid impairment of the metallic constituents in the electrode manus held holder. DC currents are used alternatively of AC ( Alternating ) due to electrical safety and the trouble of keeping the discharge in wet conditions. Motor generator welding machines are normally used. For the moisture type welding it is of import that the circuit includes a knife switch ( Positive type ) . This sort of switch is operated on the surface but eventually commanded by the frogman for optimal safety. This switch should be capable of interrupting the full welding current and stops the dyer's rocket ax the switch is non-operated. As mentioned antecedently, even the electrode itself should hold a particular coating of waterproofing. Basically all connexions should be insulated in order that no H2 O comes in contact with any metal parts. If this insularity is damaged, current will leak and will non be available in the discharge. ( Levi, 2010 ) This method is low cost compared to dry welding, it is besides an onsite occupation i.e. no demand of complex equipment an the frogman can make places of the offshore construction that could non be reached by other types of welding. Some disadvantages are that there is an immediate quench of the welded articulation due to environing Waterss ( additions tensile strength – decreases ductileness & A ; increasure in porousness and hardness ) .large sums of H is present taking to disruptions. H2 dissolves in heat affectional zone and the welded articulation could check. The chief disadvantage is the safety issue sing visibleness and currents Degree centigrades: UsersNathanielDesktopWelding.Programs.jpg Hyperbaric Dry Welding ; here the dyer's rocket is done in a certain chamber. This chamber is normally filled up with He incorporating 0.5 saloon of O at positive force per unit area somewhat above ambient. These dyer's rockets are somewhat higher in quality that of moisture welding and run into X-ray cryptography demands. For such a procedure the ‘Manual Metal Arc ‘ is used or the ‘Gas Tungsten Arc ‘ welding is used ( depending on the welder accomplishments ) . The welding is done in dry conditions but at hydrostatic force per unit areas of the deepness of the environing sea. For the dry dyer's rocket procedure the welding power generator could be AC and DC. Degree centigrades: UsersNathanielDesktopCommercialDryBell.jpg Some advantages of dry welding are that the frogman is safer since the dyer's rocket is performed in an enclosed chamber, hence no direct distractions from currents, and visibleness is much better than moisture welding since the chamber is illuminated. Good quality dyer's rockets are achieved comparable to come up welding and H2 degrees are much lower than H2O dyer's rockets, not distructave proving could be performed in the chamber. Some disadvantages are that the procedure requires much more capital and support at the surface as the method is much more complex, the cost additions with deepness, and the procedure is non every bit flexible as the unfastened H2O dyer's rocket as the connection subdivisions should suit the enclosed chamber. ( Akers, 2012 ) To depict the procedure of Manual Arc Welding, the work that is traveling to be welded should be straight connected to the positive side of the electric circuit via overseas telegrams. Sometimes the Earth overseas telegram incorporates more than 1 connexion in order to obtain the best circuit continuity for the land. A flux ( plus H2O proofing ) electrode is connected to the manus held holder via another overseas telegram which are connected to a power welding coevals beginning. When the tip of the electrode touches the work piece, the current discharge from the spread and causes a flicker which melts the base metal and the electrode organizing a dyer's rocket puddle. Degree centigrades: UsersNathanielDesktopwelding-circuit.gif Comparing both diagrams we can detect some differences. For the moisture procedure, DC current, a knife switch and dual insularity overseas telegrams are required. The mutual opposition is -ve, whilst the circuit is fundamentally the same. As the discharge is moved off from the work piece, the pool solidifies and the articulations are fused together. This welding pool is controlled by changing the current which flows through the discharge being produced and by altering the electrode diameters. Typical temperatures are those of 5000Â °C. by such a procedure a consequence of metallurgical bonding is achieved through the work piece. At these elevated temperatures, metals are ‘active ‘ and if it comes in contact with air it rusts immediately and the mechanical belongingss of the joint fail. For such a ground the discharge welding provides agencies of screening to the dyer's rocket pool ( gas, scoria ) . This is known as metallic discharge shield and is accomplished by the flux covering the electrode nucleus. The scoria produced as the pool cools and solidifies has its map to minimise contact of dyer's rocket to air until temp lessenings. The discharge creates a little pit formed inside the flux. This is for the flux to fire slower than the metal barrel i.e. helping in the protection and control of the metal sedimentation that leave the electrode. For the welding procedure this is a critical in order to keep a changeless discharge and weld articulation. Even in hapless under H2O visibleness, the frogman needs to maintain force per unit area on the electrode to keep a changeless good provender rate. In under H2O welding in is really of import to advert that the discharge behaves otherwise than it does in air. In H2O gas bubbles are a really of import factor as these create an unstable discharge for good welding conditions. In concurrence with this, it is much more hard to command the dyer's rocket puddle. The frogman must put currents by test and mistake depending on the Waterss conditions ( temp, salt, etc ) . Apart from this there is no difference between surface and under H2O welding. ( Kaets, 2000 ) Degree centigrades: UsersNathanielDesktopshielding-weld-arc.gif When compared to other welding procedures Manual discharge welding is normally used because the equipment is comparatively easy to utilize and inexpensive ( compared to other types ) , it is flexible, portable, and ideal for the frogman to utilize in confined infinites, no gas shield is required and eventually it is suited for about all sort of metals and metals. Some disadvantages of discharge welding are that the electrode needs to be replaced often ( more exposed to daze ) , the scoria should be removed after the dyer's rocket is performed, and the procedure is somewhat slower since the rate of deposition is slower than continuously fed electrode procedure ( Gas Tungsten Arc ) . ( Kaets, 2000 ) One last note sing under H2O welding ; there is a procedure non normally used which features a specially built keeping torch which sprays a changeless cone made of high force per unit area H2O, with protective gas under force per unit area to insulate the welded are from the H2O during the dyer's rocket is performed. Besides a recent development was done affecting under H2O optical maser beam welding. This method is still being improved but will shortly be applicable for the offshore industry. ( Clutter, 2012 )