Effects of solution and aging treatment parameters on the microstructure evolution of Ti–10V–2Fe–3Al alloy

High Temperature Materials and Processes

Xiong Wei¹  Hao Wen-Tao¹  Shi Rui-Ju²  Zhao Jiang²  Liu Qiao²  Quan Guo-Zheng²  Zhang Wan-Liang³ 

[1] Institute of Nuclear and New Energy Technology of Tsinghua University, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Beijing, 100084, China;School of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China;State Key Laboratory of Deep-sea Manned Vehicles, China Ship Scientific Research Center, Wuxi, 214082, China;

关键词: heat treatment;    titanium alloy;    microstructure evolution;   

DOI  :  10.1515/htmp-2020-0060

来源: DOAJ

【 摘 要 】

The solution-aging treatment parameters, including solution temperature, cooling rate and aging temperature, have significant influences on the microstructures and comprehensive mechanical properties of titanium alloy. In this work, the detailed microevolution behaviors of Ti–10V–2Fe–3Al alloy under different solution and aging conditions have been investigated through a series of heat-treatment experiments. The results of solution-treatment experiments reveal that the content of αp-phase is reduced to zero as the solution temperature is raised to a certain α → β critical transformation point. Recrystallized β-grains can be observed at the solution temperature of 820°C. In addition, the cooling way (air cooling or water cooling) has little influence on the microevolution behaviors for this alloy during the solution-treatment process. As for the solution-aging-treatment experiments, the results reveal that αs-phases are precipitated from the supersaturated β-phase, and the fraction of αs-phase increases with increasing aging temperature. However, the precipitated α-grains intend to coalesce and coarsen as the aging temperature raises above 510°C. Therefore, the advocated solution-aging-treatment program is solution treatment at 820°C with air cooling followed by aging treatment at 510°C with air cooling.

【 授权许可】

Unknown