Micromechanism of short crack initiation and propagation in Ti-15-3 alloy

被引：0

作者：

Wang, Ping ^{[1
]}

Liang, Tian ^{[1
]}

Hou, Shi-Yao ^{[1
]}

Lei, Jia-Feng ^{[2
]}

机构：

[1] The Key laboratory of Ministry of Education for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China

[2] Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2008年 / 29卷 / 12期

关键词：

Crack initiation - Titanium alloys - Crack propagation - Grain boundaries;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Effects of grain misorientation angles on the short crack initiation and propagation in Ti-15-3 alloy were studied by means of electron back scattered diffraction (EBSD) and scanning electronic microscope (SEM). In Ti-15-3 alloy, 98% of misorientation angles between adjacent grains are greater than 10. Among adjacent grains the big misorientation angles are favorable to short crack initiation, whereas the small ones are favorable to short crack propagation. If the included angle between the orientation of short crack tip and that of slip band of next grain is greater than 35, the crack is easy to zigzag when passing through the next grain; if the angle is less than 35, the crack propagates along the orientation slip band. When the short crack tip propagates to reach grain boundary and if the included angle between the orientation of short crack tip and that of grain boundary is less than 35, the short crack propagates along grain boundary and if the angle is greater than 35, a transgranular crack propagates.

引用

页码：1711 / 1714