Question

g. Draw strain and stress curve for cold, hot and warm working in one graph

Answer 1

The below is the graph comparing cold, hot and worm worked componet.

1) Cold worked component

2) Worm worked component

3)Hot worked component

The following points are to be remembered while making a graph between stress and strain

1) Yield strength increases with cold working.

2) Tensile strength increases with cold working

3) DUctility decreases with cold working.

4) Ductility improves for the hot worked component but strength decreases.

5) Worm worked component will have properties in between hot worked and cold worked component.