Mechanical properties of metals

Mechanical properties of metals

1:Strength
It is the ability of a material to resist against external applied forces without breaking.
2: Stiffness
It is the ability of a material to resist deformation under stress
3: Elasticity
It is the property of a material to regain its original shape after deformation when the external forces are removed.So we can say that steel is more elastic than rubber.
4:Plasticity
It is the property of a material  which retains the deformation produced under load permanently. This property of material is essential for forging and stamping on coins.
5: Ductility
It is the property of a material enabling it to be drawn into wire with the application of a tensile force. So according this ability mild steel,copper,aluminium,zinc,tin and lead are ductile materials
6: Brittleness
It is the property of a material opposite to ductility. So cast iron is a brittle material.
7: Malleability
It is the property of a material which allow the material to be rolled or hammered into sheets.soft steel and wrought iron are examples of malleable materials.
8: Toughness
It is the property of a material to resist fracture against impact load like hammer blows.This property of material is decreased when they heated.
9: Resilience
It is the property of a material to absorb energy and resist against shock loads. Springs are perfect example of this property.
10 Creep
When parts are subjected under constant stress at high temperature at the long duration, slowly and permanently deformation is called creep. Internal combustion engines,boilers and turbines are designed to consider this property.
11: Fatigue
When a material is subjected under repeated stresses,it fail at stresses below the yield point. Such type of failure is called fatigue.This property is used to design gears,shafts and connecting rods.
12: Hardness
It is the property of a metal to cut another metal.

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