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TiAl 合金低周疲劳失效机理综述
Overview of the Low-cycle Fatigue Failure Mechanism of TiAl Alloy
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- DOI:
- 作者:
- 罗青松1，相恒高1，魏代修1，殷亚军2，祁志祥1，郑 功1，许 昊1，周 冰1，陈 旸1
LUOQingsong1, XIANG Henggao1, WEI Daixiu1, YIN Yajun2, QI Zhixiang1, ZHENG Gong1, XUHao1, ZHOUBing1
- 作者单位:
- 1. 南京理工大学高端装备铸造技术全国重点实验室，先进金属与金属间化合物材料技术工业和信息化部重点实验室， 材料评价与设计教育部工程研究中心，江苏南京210094；2.华中科技大学材料科学与工程学院，材料成形与模具技术全 国重点实验室，湖北武汉430074
1. State Key Laboratory of Advanced Casting Technologies, MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology, Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China; 2. School of Materials Science and Engineering, State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
- 关键词:
- TiAl 合金；低周疲劳；片层取向；位错；孪晶；失效机理
TiAl alloy; low-cycle fatigue; lamella orientation; dislocation; twin; failure mechanism
- 摘要:
- TiAl合金具有优异的比强度和高温稳定性，被广泛应用于航空航天领域。随着社会发展对飞机发动机运行 稳定性和可靠性的要求越来越高，TiAl合金的低周疲劳性能和失效机理越来越受到关注。 本文综述了近30年来TiAl 合金低周疲劳方面的研究进展，包括应变范围、温度、合金成分、组织类型、片层取向、微观变形等对TiAl合金低周疲劳 行为的影响机理，重点阐释了测试条件与TiAl合金微观结构的交互作用对疲劳失效行为的影响规律。TiAl alloys have excellent specific strength and high-temperature microstructure stability and are widely used in the aerospace field. With the increasing demand for stable and reliable aircraft engine operation in social development, the low-cycle fatigue performance and failure mechanism of TiAl alloys are receiving increasing attention. This study summarizes the research on low-cycle fatigue of TiAl alloys over the past 30 years, including the influence mechanism of strain range, temperature, alloy composition, microstructure type, layer orientation, and microdeformation on the low-cycle fatigue behavior of TiAl alloys. The effects of the interaction between the test conditions and the TiAl alloy microstructure on the fatigue failure behavior are emphasized.