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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 3    June 2002

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Damage evolution of metallic materials during
high temperature plastic deformation
WANG Ling-yun(汪凌云)1, LIU Xue-feng(刘雪峰)2,
TANG Ai-tao(汤爱涛)1, HUANG Guang-jie(黄光杰)1

1. College of Materials Science and Engineering,
Chongqing University, Chongqing 400044, China;
2. Department of Metal Materials Engineering,
Sichuan University, Chengdu 610065, China

Abstract:The damage evolution of high temperature plastic deformation of metallic materials was studied by use of continuum damage mechanics (CDM) theory. Based on thermodynamics, on a damage variable D and Zener-Hollomon parameter Z, and on the effective stress concept, a damage evolution model of high temperature plastic deformation was derived and was used to analyze the damage evolution of 1420 Al-Li alloy during high temperature plastic deformation. The model that is verified by tests can also be applied to the materials that are loaded prorata or out of proportion during high temperature plastic deformation. It extends the applied scope of damage mechanics.

 

Key words: damage mechanics; Zener-Hollomon parameter; damage variable

ISSN 1672-7029
CN 43-1423/U

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