Study on Precipitates Behavior During Heat Treatment in Ti-B19 Titanium Alloy

摘要：

The phase transformation and microstructure evolution of near β Ti-B19 alloy during solution and aging treatment were studied systematically by using the optical microscopy(OM), x-ray diffractometer(XRD), scanning electron microscope(SEM) and transmission electron microscope (TEM). The results showed that equiaxed β structure consisting of metastable β phase and silicide phase formed in the sample after solution treatment. When the samples were aged between 300℃ and 450℃ ,the ellipsoid ω phase appeared firstly in β matrix,and gradually transformed into equilibrium α phase,acicular α could precipitate directly from β matrix besides particle α precipitation from β phase through transition of ω phase. Upon increasing the aging temperature to 500-650℃, acicular α phase precipitated directly in β grain boundaries. Linear α phase consisting of particle α phase was found in the samples at the ageing temperature above 500°C. For the samples aged at 700-750°C ,the plate-like α phase precipitated along β grain boundaries.

关键词： TirB19 titanium alloy aging treatment phase transformation

作者: Luo Yuanyuan Zeng Weidong Zhao Yongqing Lu Yafeng Xi Zhengping

作者单位: School of Materials Science and Engineering,Northxvestern Polytechnical University ,Xian 710072,P. School of Materials Science and Engineering,Northxvestern Polytechnical University ,Xian 710072,P. Northwest Institute for Nonferrous Metal Research ,Xian 710016 ,P. R. 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: 1054-1057

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）