The propagation mechanism of thermal fatigue cracks on Ti/Al2O3 functionally graded materials

被引：0
|
作者：
Shi Guopu [1 ]
Wang Zhi
Ji Yingrui
Sun Xiang
Xu Qiuhong
机构：
[1] Jinan Univ, Jinan 250022, Peoples R China
[2] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
[3] Shandong Tiezheng Project Testing Ctr, Jinan 250014, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2007年 / 36卷
关键词：
functionally gradient materials; thermal fatigue; cracks propagation; intergranular crack; transcrystalline fracture;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phases in the Ti/Al2O3 FGM section cross ware tested by XRD. The origin of thermal fatigue cracks and their propagation way and shapes were studied. The results show that the system is mainly composed Ti, Al2O3 and a few of TiAl, TiAl, AlNb2. The thermal fatigue cracks mainly germinate and expand at the Ti3Al particles in the interface of Ti/Al2O3 and the pores around the Ti3Al particles. Along with the diversification of components, the propagation form of cracks changes from intergranular crack into transcrystalline fracture and the cracks propagation route is not straight-line but deflection at different gradient layers.
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页码：685 / 688
页数：4
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