Study on fatigue crack propagation in different zones of TA15 electron beam welded joint

被引：3
|
作者：
Li X.-Z. [1 ]
Hu S.-B. [1 ]
Xiao J.-Z. [1 ]
Wang Y.-J. [2 ]
Li Q.-H. [1 ]
Ji L.-B. [1 ]
机构：
[1] State Key Laboratory of Material Processing and Die and Mould Technology, Huazhong University of Science and Technology
[2] Beijing Institute of Aeronautical Materials
来源：
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | 2010年 / 30卷 / 01期
关键词：
Electron beam weld (EBW); Fatigue crack propagation; Microstructure; TA15; titanium;
D O I：
10.3969/j.issn.1005-5053.2010.1.010
中图分类号：
学科分类号：
摘要：
The microstructure, hardness, fatigue crack propagation and fatigue fractograph in the fusion zone (FZ) and heat affection zone (HAZ) of TA15 electron beam welded (EBW) joint were studied in this paper. The results indicate that the microstructure in FZ is characterized by bulky aciculate martensite, and in HAZ, the microstructure is composed of α' martensite + lamellar α and β. That is, it shows a transition from FZ to base material (BM). The hardness of FZ is largest, that of BM is the lowest, and HAZ with between them. The fatigue crack propagation rate is closely relative with their microstructure. The HAZ containing more plastic lamellar α exhibits a better resistance to the fatigue crack propagation than FZ.
引用
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页码：52 / 56
页数：4
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