简介概要

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

来源期刊:Acta Metallurgica Sinica2002年第6期

论文作者:A.R.Morgridge

Key words:initial grain size; recrystallization; stress relaxation;

Abstract: 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 compressiontests and stress relaxation curves from Gleeble 1500. Initial grain sizes were variedbetween 20 and 93 microns. Stress strains curves for Cr steel for different initialgrain sizes and recrystallization times have been highlighted. Similar observation wasmade for metadynamic recrystallization with shorter retardation times. Staticallyrecrystallized grain size also increased as initial grain size increases. It is found thatthe values of initial grain size have significant effects on the mean flow stress andstatic recrystallization kinetics as well as the peak strain values to initiate dynamicrecrystallization.

详情信息展示

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

A.R.Morgridge1

(1.Mechanical Engineering Dept. of University of Ibadan, Ibadan, Nigeria)

Abstract: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 compressiontests and stress relaxation curves from Gleeble 1500. Initial grain sizes were variedbetween 20 and 93 microns. Stress strains curves for Cr steel for different initialgrain sizes and recrystallization times have been highlighted. Similar observation wasmade for metadynamic recrystallization with shorter retardation times. Staticallyrecrystallized grain size also increased as initial grain size increases. It is found thatthe values of initial grain size have significant effects on the mean flow stress andstatic recrystallization kinetics as well as the peak strain values to initiate dynamicrecrystallization.

Key words:initial grain size; recrystallization; stress relaxation;

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