Comparative study of structure and property modification by

Comparative study of structure and property modification by cold and hot working processes .? At least five comparisons !?

note : in word denouements place so i can copy it and paste it

Solution

Hot Working

Cold Working

simultaneous process of deformation and recovery takes place.

no appreciable recovery can take place during deformation.

hardening due to plastic deformation is completely eliminated by recovery and re crystallization, only if the rate of re crystallization is higher than deformation.

Harding is not eliminated in this case. This is always accompanied by work hardening.

Refinement of crystal occurs.

Grains are only elongated and distorted.

Cracks and blow holes are welded up.

Possibility of crack formation and its propagation is great.

Mechanical properties such as elongation, reduction of area, and impact value are improved

Cold working decreases elongation, reduction of area, and impact value.