MECHANCAL PROPERTIES
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1.Elasticity
*It is the property by virtue of which a material deformed under the load is enabled to return to its original dimension when the load is removed.
*Steel,Aluminium,Copper may be considered to be perfectly elastic within certain limit.
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2.Plasticity
*The characteristics of the material by which it undergoes inelastic strain beyond those at the elastic limit is known as plasticity.
*This property is particularly useful in operation of pressing and forging.
3.Ductility
*It is the property which permits a material to be drawn out longitudinally to reduced section, under the action of tensile force.
*Ductile material must have low degree of elasticity.
*This is useful in wire drawing.
4.Brittleness
*It is the property by virtue of which a material breaks easily under action of shock loads
*It is lack of ductility
*EX: glass,ceramics
5.Malleability
*It is the property of material which permits the material to be extended in all direction without breaking.
*A malleable material posses a high degree of plasticity.
6.Toughness
*It is the property of material which enables it to absorb energy without fracture.
7.Hardness
*It is the ability of a material to resist indentation (or) Surface Abrasion.
*Brinell hardness test is used to check hardness.
8.Strength
*It is the property enables material to resist fracture under load
*This is the most important property from design point of view
9. Machinability
*It is the property of a material, which indicates the ease with which it can be out cur (or) removed in various machining operations such as turning, drilling, boring and shaping
10. Workability
*It is the property of a material which indicates the ease with which it can be formed into different shapes and sizes.
11. Stiffness
*It is the property of a material by virtue of which it resists deformation.
12. Creep
*It is the property of a material by virtue of which it deforms continously under as steady load
13. Fatigue
*It is the property of a material by virtue of which it deforms under the fluctuating (or) repeated loads.