Study on Fatigue Crack Propagation Behavior of Low Cost Titanium Alloy Ti8LC

被引：0
|
作者：
Jia Weiju [1 ]
Zeng Weidong
Duan Fengchuan [2 ]
Wang Yan [2 ]
Zhou Yigang
机构：
[1] NW Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] Hong Yuan Aviat Forging & Casting Ind Co, AVIC 1, Sanyuan 713801, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷 / 12期
关键词：
low cost titanium alloy; fracture toughness; fatigue crack propagation rate; FRACTURE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Low-cost titanium alloy Ti8LC was heat treated by duplex annealing. Its tensile properties were tested, and the fatigue crack propagation behavior as well as fatigue fracture mechanism were studied. Results show that the strength of the alloy increases a little but the ductility decreases with the increase of the first annealing temperature. SEM analysis on the fatigue crack propagation was performed, and the analysis results indicate that the fatigue crack propagates in three modes of three regions. The presplitting region was cleavage fracture. In the stationary state growth region, fatigue crack grew ahead in the form of striation mechanism and many second fatigue cracks were observed in the meantime. In the fast-growth region is mainly dimple. The temperature of duplex annealing has little influence on fatigue crack propagation behavior.
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页码：2171 / 2174
页数：4
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