Effect of stress ratio on fatigue crack growth of Ti40 alloy

The effect of stress ratio on fatigue crack growth （FCG） behavior of Ti40 alloy was analyzed. A unified approach, developed by VASUDEVAN and SADANANDA was used. The approach is based on the realization that fatigue requires two load parameters for unambiguous description. They are two fracture mecha...

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Bibliographic Details
Published inTransactions of Nonferrous Metals Society of China Vol. 17; no. A01; pp. 209 - 212
Main Author 吴欢 赵永庆 曾卫东
Format Journal Article
LanguageEnglish
Published 01.11.2007
Subjects
应力实验
疲劳裂缝
钛合金
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Summary:The effect of stress ratio on fatigue crack growth （FCG） behavior of Ti40 alloy was analyzed. A unified approach, developed by VASUDEVAN and SADANANDA was used. The approach is based on the realization that fatigue requires two load parameters for unambiguous description. They are two fracture mechanics parameters： the maximum stress intensity factor K~ and the stress intensity amplitude AK. The results show that there are two mechanisms controlling the FCG behavior of Ti40 alloy. The curves of the two mechanisms in trajectory map are similar. They deviate to Kmax axial more strongly compared with other titanium alloy, which indicates that Ti40 alloy is more sensitive to environment.
Bibliography:Ti40 alloy; stress-ratio; fatigue crack growth; unified approach; trajectory map
43-1239/TG
fatigue crack growth
stress-ratio
TG146.2
Ti40 alloy
trajectory map
unified approach
ISSN:1003-6326