EFFECT OF INITIAL GRAIN SIZE ON STATIC RECRYSTALLIZA-TION SOFTENING IN Cr STEEL USING STRESS RELAXATION TECHNIQUE

Effect of initial grain size (I.G.S.) on static recrystallization softening in Cr steel (0.77wt. % Cr) has been investigated through the use of interrupted hot compression tests and stress relaxation curves from Gleeble 1500. Initial grain sizes were varied between 20 and 93 microns. Stress strains curves for Cr steel for different initial grain sizes and recrystallization times have been highlighted. Similar observation was made for metadynamic recrystallization with shorter retardation times. Statically recrystallized grain size also increased as initial grain size increases. It is found that the values of initial grain size have significant effects on the mean flow stress and static recrystallization kinetics as well as the peak strain values to initiate dynamic recrystallization.

EFFECT OF INITIAL GRAIN SIZE ON STATIC RECRYSTALLIZA-TION SOFTENING IN Cr STEEL USING STRESS RELAXATION TECHNIQUE

Effect of initial grain size (I.G.S.) on static recrystallization softening in Cr steel (0.77wt. % Cr) has been investigated through the use of interrupted hot compression tests and stress relaxation curves from Gleeble 1500. Initial grain sizes were varied between 20 and 93 microns. Stress strains curves for Cr steel for different initial grain sizes and recrystallization times have been highlighted. Similar observation was made for metadynamic recrystallization with shorter retardation times. Statically recrystallized grain size also increased as initial grain size increases. It is found that the values of initial grain size have significant effects on the mean flow stress and static recrystallization kinetics as well as the peak strain values to initiate dynamic recrystallization.