TiAl合金疲劳小裂纹行为
收稿日期: 2025-11-12
修回日期: 2026-01-12
网络出版日期: 2026-03-13
基金资助
国家自然科学基金项目(12202201);国家自然科学基金项目(52571145);国家自然科学基金项目(92463301);国家自然科学基金项目(52433016);国家自然科学基金项目(92163215);国家自然科学基金项目(52305379);国家自然科学基金项目(52174364);国家自然科学基金项目(52595663);江苏省自然科学基金项目(BK20243066);江苏省自然科学基金项目(BE2023024);高温轻合金及应用技术全国重点实验室开放基金项目(Sysjj2025203);高温轻合金及应用技术全国重点实验室开放基金项目(Sysjj2025101)
Fatigue Small Crack Behavior of TiAl Alloys
Received date: 2025-11-12
Revised date: 2026-01-12
Online published: 2026-03-13
Supported by
National Natural Science Foundation of China(12202201);National Natural Science Foundation of China(52571145);National Natural Science Foundation of China(92463301);National Natural Science Foundation of China(52433016);National Natural Science Foundation of China(92163215);National Natural Science Foundation of China(52305379);National Natural Science Foundation of China(52174364);National Natural Science Foundation of China(52595663);Jiangsu Provincial Natural Science Foundation(BK20243066);Jiangsu Provincial Natural Science Foundation(BE2023024);State Key Laboratory of Light Superalloys(Sysjj2025203);State Key Laboratory of Light Superalloys(Sysjj2025101)
相恒高 , 宋伟东 , 加陆毅 , 祁志祥 , 陈旸 , 周冰 , 郑功 , 应盼 , 陈光 . TiAl合金疲劳小裂纹行为[J]. 金属学报, 2026 , 62(5) : 721 -732 . DOI: 10.11900/0412.1961.2025.00367
TiAl alloys are important lightweight materials for aerospace propulsion systems owing to their low density, creep resistance, corrosion resistance, and other properties. Fatigue is the primary failure mode of aeroengine blades. Once a long crack forms in a blade, rapid fracture can occur. The initiation and propagation of small fatigue cracks therefore directly determine the service life of blades. Focusing on the issue of small fatigue cracks in TiAl alloys, this paper systematically reviews the definition and characteristics of small fatigue cracks and summarizes the mechanisms of crack initiation and propagation in TiAl alloys. In addition, the propagation models of small fatigue cracks, together with their applicability and limitations, are discussed. Finally, future perspectives are presented regarding the characterization of fatigue small-crack initiation and propagation behavior and the development of unified life prediction methods for TiAl alloys.
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