刘巧沐

• 1:中国航发四川燃气涡轮研究院

摘要(Abstract)：

利用光学显微镜(OM)和电子背散射技术(EBSD)研究α+β型TC25G钛合金大规格棒材不同位置的显微组织和晶体取向。结果表明:锻态TC25G棒材不同位置组织和织构不同;表面位置和1/2R位置为双态组织,棒材中心为等轴状初生α相、棒状α板条和β转变组织;棒材表面为α相<0001>//AD和<1120>/<1010>//AD的弱织构,1/2R位置处为<1120>//AD的弱织构,中心位置形成<2022>织构;适当增加β单相区的锻造变形量,细化原始β晶粒并通过控制α+β两相区的终锻温度,降低坯料的温度梯度,提高坯料应变场的均匀性,可提高棒材组织和晶体取向分布的均匀性。

关键词(KeyWords)： 钛合金;显微组织;织构;热加工;棒材

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘巧沐

DOI: 10.13289/j.issn.1009-6264.2018-0045

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