Fatigue behavior of Ti-6Al-4V alloy in vacuum and at low temperature

被引：4

作者：

Zuo, J. H. ^{[1
]}

Wang, Z. G. ^{[2
]}

Han, E. H. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Environm Corros Res Ctr, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

STRUCTURAL INTEGRITY AND FAILURE | 2008年 / 41-42卷

基金：

中国国家自然科学基金;

关键词：

Ti-6Al-4V alloy; vacuum; low temperature; fatigue behavior; coupling function;

D O I：

10.4028/www.scientific.net/AMR.41-42.83

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Investigations have been conducted on the fatigue behavior of Ti-6Al-4V alloy with the bimodal microstructure in air at room temperature, in vacuum at room temperature and in vacuum at low temperature (100K), respectively. The results show that the fatigue life of this alloy is longer in vacuum and/or at low temperature than that in air at room temperature. The combination of vacuum and low temperature can much improve the fatigue properties of this alloy because of their purifying effect on fatigue cracks propagation. SEM observation of fatigue fracture surface indicates that all the fatigue cracks initiate in the sample surface when N-f <= 10(6) cycles. The above three testing conditions lead to different modes of fatigue crack propagation and therefore much different morphology of fatigue fracture.

引用

页码：83 / +

页数：3

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