DISLOCATION THEORY OF STEADY-STATE DEFORMATION AND ITS APPROACH IN CREEP AND DYNAMIC TESTS

被引：75

作者：

GOTTSTEIN, G ^{[1
]}

ARGON, AS ^{[1
]}

机构：

[1] MIT,CAMBRIDGE,MA 02139

来源：

ACTA METALLURGICA | 1987年 / 35卷 / 06期

关键词：

METALLOGRAPHY - Lattice Defects - STRAIN - STRESSES;

D O I：

10.1016/0001-6160(87)90007-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A concept of strain hardening in constant strain rate (CSR) tests and creep tests is presented taking into account dislocation production and recovery by slip, climb and concurrent subboundary migration. A master equation is derived to relate the evolution of the dislocation density with strain rate and stress. Transient and steady state equations are developed for various combinations of recovery mechanisms in both types of tests and are analyzed with respect to material characteristics and test conditions. For steady state, equivalent relations between stress and strain rate are obtained for both test modes. The derived dependencies are discussed with respect to experimental results in order to elucidate the occurrence and impact of possible recovery mechanisms.

引用

页码：1261 / 1271

页数：11