刘永达 董福宇 林雪健 张悦 石明浩 黄宏军 袁晓光
中图分类号:TG146.2 文献标志码 A
Effects of Plasma hydrogenation on Microstructure and Mechanical Properties of TiAl Alloy
Liu Yongda, Dong Fuyu, Lin Xuejian, Zhang Yue, Shi Minghao, Huang Hongjun, Yuan Xiaoguang
(School of Materials Science and Engineering, Shenyang University of Technology)
Abstract:Effects of hydrogen on the microstructure and mechanical properties of TiAl alloy hydrogenated by plasma were investiagted. The actual hydrogen content measured by the LECO ROH600 hydrogen and oxygen analyzer reach 0.060%. The XRD, SEM, microhardness, room temperature and high temperature mechanical properties, and high temperature deformed microstructures were analyzed for hydrogenated and unhydrogenated TiAl alloys. The results reveal that the phase composition of TiAl alloy with hydrogen is absent change, and it is still γ Ti Al and α2-Ti3Al. Hydrogen exists in solid solution in the TiAl alloy. After the TiAl alloy is hydrogenated by plasma, the hardness and compressive strength at room temperature are improved. The flow stress during high temperature deformation is decreased, and the degree of material recrystallization is improved, so the deformation presents more uniform.
Key Words: TiAl Alloy, Plasma hydrogenation, Microstructure, Mechanical Properties, EBSD