2MalleableA temporary shape change that is self-reversing after the force is removed, so that the object returns to its original shape, is called elastic deformation. In other words, elastic deformation is a change in shape of a material at low stress that is recoverable after the stress is removed. This type of deformation involves stretching of the bonds, but the atoms do not slip past each other.
3Plastic DeformationBeyond the elastic limit the material undergoes plastic deformation. Unlike elastic deformation, plastic deformation is not recoverable, i.e. the change is permanent.Ductile materials undergo large plastic deformations and waisting before fracturing; brittle materials undergo very little plastic deformation.Also known as placticity
4Plastic Deformation Failure by plastic deformation Use the info link to see examples of designs and materials testing, using rapid prototyping
6AlloysA mixture containing two or more metallic elements or metallic and non-metallic elements usually fused together or dissolving into each other when molten; "brass is an alloy of zinc and copperFerrous and nonferrous alloys
7Alloys Change the melting point Increase strength, hardness & ductilityChange colourGive rise to better castingChange electrical and thermal properties
8Iron & Carbon Stainless Steel is an alloy of Carbon and Iron Stainless steel is one of the fastest growing metals. Today, it is difficult to imagine life without this most durable and versatile material. And, it is 100% recyclable.
10Task 1Explain the term ‘alloy’ and give examples of two ferrous and two non-ferrous alloys.Give one example of how the following metals might be used and state which of the material’s characteristics makes it particularly appropriate for the application that you have given.Cast iron CopperAluminium Brass
13SuperalloysA superalloy, or high-performance alloy, is an alloy that exhibits excellent mechanical strength and creep resistance at high temperatures, good surface stability, and corrosion and oxidation resistance. Superalloys typically have an austenitic face-centred cubic crystal structure.
14SuperalloysA superalloy's base alloying element is usually nickel, cobalt, or nickel-iron. Superalloy development has relied heavily on both chemical and process innovations and has been driven primarily by the aerospace and power industries.
15SuperalloysTypical applications are in the aerospace industry, eg. for turbine blades for jet engines
16Task 2Define the following words and add a suitable images to illustrate your answerPlastic deformationElastic deformationSuperalloysCreepOxidisationMalleableDuctile