A Theory of Plastic Deformation of Metals at High Temperatures : (III) Creep with a Period of Stress-Removal

Abstract

Behaviour of mild steel in interrupted stress creep tests was discussed in view of the authors' theory of deformation, in which the behaviour of metallurgically stable metals was taken as the processes consisting of both effects of work hardening and recovery. It was understood that the theory of recovery based on the existence of dislocations and vacancies as imperfection in metals was applicable for interpreting the delayed recovery after sudden change in strain rate. The delayed recovery was studied by experimentins with a 0.12 percent carbon steel subjected to interrupted stressing at 450°C. The experimental results were interpreted quantitatively by the authors' theory.