MICROMECHANICS OF STRESS AND STRAIN-CONTROLLED, HIGH-CYCLE FATIGUE-CRACK INITIATION OF INTERMETALLIC COMPOUNDS

被引：2

作者：

LIN, TH

CHEN, QY

机构：

[1] Department of Civil Engineering, University of California, Los Angeles

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 170卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90373-M

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Tests have shown that ordered intermetallic compounds favor planar slip and tend to have no cross-slip or multislip. The yield stress of ordered compounds is less than that of disordered compounds. However, the stress-controlled, high cycle fatigue fife of ordered compounds is appreciably more than that of disordered compounds. This is considered to be caused by a low rate of crack initiation. In contrast, strain-controlled tests show that ordering shortens life by crack initiation. In this paper, we attempt to explain these observed behaviors by the micromechanic theory of high cycle fatigue crack initiation developed by Lin and coworkers. The effect of ordering on crack initiation under cyclic combined axial and torsional loadings is also shown.

引用

页码：103 / 110

页数：8

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