张树志,张长江,候赵平,林鹏,孔凡涛,陈玉勇

• 1:太原理工大学材料科学与工程学院
• 2:哈尔滨工业大学金属精密热加工国家级重点实验室

摘要(Abstract)：

为了获得不同典型组织,对锻态Ti-45Al-9Nb-Y合金进行不同工艺的热处理。在1330℃锻态Ti-45Al-9Nb-Y合金进行高于锻造温度的热处理,等轴γ晶粒内析出魏氏α相。魏氏α相以Blackburn位向关系在γ相内形成,其出现有利于双态组织中片层晶团的形成,因此锻态Ti-45Al-9Nb-Y合金在1340℃保温10 min即可获得双态组织。在全层片组织的热处理中,魏氏α相基本消失,1410℃保温30 min可获得全层片组织。不同形态的组织力学性能测试表明:全层片组织的强度最高在800℃,可达710 MPa;双态组织在900℃的伸长率可达42%左右。

关键词(KeyWords)： 高Nb-TiAl合金;热处理;魏氏α组织;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51074058);; 北京科技大学新材料国家重点实验室基金(2013-ZD06,2014-ZD06);; 太原理工大学人才引进资金(tyut-rc201342a);; 太原理工大学校基金-青年团队基金(2013T004)

作者(Author): 张树志,张长江,候赵平,林鹏,孔凡涛,陈玉勇

DOI: 10.13289/j.issn.1009-6264.2015.08.017

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