Question

What are the main classes of engineering materials?

Answer 1

Engineering materials are mainly classified into the following categories.

a) Ferrous Metals-

Some normal ferrous metals incorporate compound steel, carbon steel, cast iron and created iron. These metals are valued for their elasticity and sturdiness. Carbon Steel – otherwise called auxiliary steel. Examples of ferrous material include

(I) Carbon Steel-

(ii) Alloy Steel -

(iii) Steel-

(iv) Wrought Iron -

(v) Cast Iron -

b) Non-ferrous Metals-

Non-ferrous metals incorporate aluminium, copper, lead, zinc and tin, just as valuable metals like gold and silver. Their fundamental bit of leeway over ferrous materials is their pliability. Examples of non-ferrous material include

(I) Copper -

(ii) Aluminium -

(iii) Zinc

(iv) Lead -

(v) Tin-

c) Plastics (thermoplastics, thermosets)-

(I) Thermoplastics-

Thermoplastics have the easiest sub-atomic structure, with artificially

autonomous macromolecules

• By warming, they are mellowed or softened, at that point moulded, shaped, welded, and hardened when cooled.

• Multiple patterns of warming and cooling can be rehashed without serious harm,

permitting reprocessing and reusing.

(ii) Thermosets-

Thermosets before solidifying, similar to thermoplastics, are autonomous macromolecules. Be that as it may, in their last state, in the wake of solidifying, they have a three dimensional structure gotten by substance crosslinking created after (splash up trim or fibre twisting) or during the process.

d) Ceramics-

Ceramics is mixed among metallic and nonmetallic components for which the between nuclear bonds are either ionic or prevalently ionic. They show physical properties that are not the same as that of metallic materials. In this way, metallic materials, earthenware production, and even polymers will in general supplement each other in service. They gang High-temperature stability, High hardness, Brittleness, High mechanical quality, and so on.

e) Composite Materials -

A composite material is made by joining at least two materials – frequently ones that have very various properties. The two materials comprise single. unique property.

Be that as it may, inside the composite you can undoubtedly distinguish the various materials as they don't break up or mix into each other. The greatest bit of leeway of current composite materials is that they are light just as solid.

f) Nano-materials -

Nanomaterials are compound substances or materials that are fabricated and utilized at an extremely little scope. Nanomaterials are created to show novel qualities contrasted with a similar material without nanoscale highlights, for example, expanded quality, synthetic reactivity or conductivity.