Mean stress sensitivity in fatigue of alpha, (alpha+beta) and beta titanium alloys

被引：39
|
作者：
Lindemann, J [1 ]
Wagner, L [1 ]
机构：
[1] TECH UNIV BRANDENBURG,D-03013 COTTBUS,GERMANY
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 234卷
关键词：
titanium alloys; mean stress sensitivity; crack nucleation; strength differentials;
D O I：
10.1016/S0921-5093(97)00347-X
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of the stress ratio on high cycle fatigue (HCF) strength has been investigated on alpha, (alpha + beta) and beta titanium alloys. While alpha and beta titanium alloys show a normal mean stress sensitivity, (alpha + beta) alloys can behave anomalously, i.e. their HCF strength at low tensile mean stresses can be much lower than expected from a linear interpolation between fully reversed HCF strength (R = -1) and tensile strength. This anomalous mean stress dependence of the HCF strength is discussed in terms of fatigue crack nucleation mechanisms. (C) 1997 Elsevier Science S.A.
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页码：1118 / 1121
页数：4
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