Effects of Mo Addition on the Microstructure and Mechanical Properties of Ti45A15Nb0. 3Y Alloy
Effects of 0. 8～1. 4at ％ (in atomic fraction) Mo addition on the microstructure and mechanical properties of Ti45A15Nb0. 3Y alloy have been studied Small quantity of β phase distributes along grain boundaries as discontinuous network in Ti45Al5NbXMo0. 3Y alloys owing to Mo segregation. With the increase of Mo content, the β blocks form on grain boundaries when Mo addition exceeds 0. 8at. ％ and the y grains occur when the Mo addition reaches 1. 2at. ％. The (3 phase can be eliminated by uniform heat treatment when the Mo content is below lat. ％. With the increase of Mo content,yield strength (YS) and ultimate compression strength (UCS) first increase and then decrease. However,the maximum compression deformation to failure (Emax)increases with increasing Mo content at room temperature. Therefore,the content of Mo element should be controlled in the vicinity of lat. ％ for Ti45Al5Nb0. 3Y alloy for avoiding reduction of creep resistance and promoting other mechanical properties.
A. TiAl Microstructure mechanical property
Hao Zhang Debin Shan Wenchen Xu
Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China Harbin Institute of Technology,Harbin 150001 ,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1575-1578
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）