Cold working of a metal involves strain hardening effect Pic

Cold working of a metal involves strain hardening effect. Pick all mechanisms that are applied to this effect. A. Dislocation density increases B. Grain boundary vanishes C. No slip systems are activated D. Dislocation mobility decreases E. Interatomic bonding strength increases F. Crystal structure rearranges G. Impurity in the metal precipitates

Solution

Reasons behind strain hardening due to cold working:

A. Dislocation density increases.

D. Dislocation mobility decreases.

F. Crystal structure rearranges.

G. Impurity in the metal precipitates.