Question

For a metal alloy, which one of the following descriptions relates to the stress-relief annealing process?

 

(A) Heating the workpiece material above its recrystallization temperature, soaking and then cooling in still air

 (B) Heating the workpiece material below its recrystallization temperature, holding for some time and then furnace cooling

 (C) Heating the workpiece material up to its recrystallization temperature and then rapid cooling

(D) Heating the workpiece up to its recrystallization temperature and cooling to room temperature alternately for a few cycles

Answer 1

slow cooling will lead to stress reliving. so furance cooling is the slowest so B will be answer