Effects of Microstructure on Deformation and Fracture Behavior of Titanium Alloys

摘要：

The deformation and fracture behavior of Ti alloys with LM and BM microstructures under both monotonic and cyclic loading were investigated. The results indicate that the ductile rupture occurs with coarse LM microstructure under monotonic loading, since the crystal orientation of part lamellar is often changed by the annealing twins. While,for the BM microstructure, the deformation easy occurs with the dislocation multiplication and movement in both αp phase and lathlike second α phase.it leads the early yielding and larger plastic deformation before fracture. Under the cyclic loading,because the crack propagation direction can be hindered by the αp phase in BM microstructure, the fracture will be delayed by the present of αp phase,and also the resistance of crack propagation of αp phase in BM can be increased by the precipitation of α2 phase. It is found that after thermal exposure the fracture of the specimen become hardly with the α2 phase precipitated in αp phase.

关键词： titanium alloy microstructure deformation behavior fracture behavior

作者: Lei Wang Teng Yu Yong-qing Zhao Yang Liu

作者单位: Key Laboratory for Anisotropy and Texture of Materials Ministry of Education) , Northeastern Univer Northeast Special Steel Group Co. ,Ltd. ,Fushun 113001 .China North-west Institute for Nonferrous Metal Research,Xian 710016,China

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 928-931

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）