Grain refinement in a cast high Nb containing TiAl alloy by heat treatment
来源期刊：Rare Metals2004年第3期
论文作者：LIU Zicheng, LIN Junpin, WANG Yanli, LIN Zhi, SONG Xiping, and CHEN Guoliang State Key Laboratory for Advance Metals and Materials, University of Science and Technology Beijing, Beijing , China
文章页码：260 - 262
摘 要：<正> The grain refinement of an as-cast Ti-46Al-8.5Nb-0.2W （atom fraction in %） alloy by the cyclic heat treatments was studied. The heat treatment scheme included a tempering at 1250°C and cyclic tempering at 1000 and 1200°C three times after solution treatment at the temperature above α phase transus followed by immediate fan cooling. The fine and homogeneous near-γ microstructure can be obtained by this heat treatment, which causes the breakdown of as-cast microstructure and prevents the anomalous growing of original γphase.
LIU Zicheng, LIN Junpin, WANG Yanli, LIN Zhi, SONG Xiping, and CHEN Guoliang State Key Laboratory for Advance Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
摘 要：<正> The grain refinement of an as-cast Ti-46Al-8.5Nb-0.2W （atom fraction in %） alloy by the cyclic heat treatments was studied. The heat treatment scheme included a tempering at 1250°C and cyclic tempering at 1000 and 1200°C three times after solution treatment at the temperature above α phase transus followed by immediate fan cooling. The fine and homogeneous near-γ microstructure can be obtained by this heat treatment, which causes the breakdown of as-cast microstructure and prevents the anomalous growing of original γphase.
关键词：
