EFFECTS OF THERMO-MECHANICAL TREATMENTS ON MICROSTRUCTURE OF Ti-43Al-9V-Y ALLOY

摘要：

Ti-43Al-9V-Y alloy billets was prepared by the quasi-isothermal canned forging processing, and effect of heat treatment processes on the microstructure of as-forged Ti-43Al-9V-Y alloy was investigated. The results show that, as-forged Ti-43Al-9V-Y alloy has streamline microstructure including a large number of recrystallized grains and broken lamellae, and different heat treatment processes were employed to obtain different microstructures of Ti-43Al-9V-Y alloy. After heat treatment at 1250℃, the microstructure of as-forged Ti-43Al-9V-Y alloy becomes γ+B2 microstructure. Comparing with the microstructure after HT of 1250℃/30 min, the precipitation of B2 lath phase in γ equiaxed grains increased and γ grains refined after HT of 1280℃/30min or 1320℃/30min. However, after the heat treatment of 1300℃/30 min, the duplex microstructures can be gained.

关键词： TiAl alloy forging heat treatment microstructure

作者: FANTAO KONG YUYONG CHEN

作者单位: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Peoples Republic of China

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 1009-1013

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）