文献类型：期刊文献

英文题名：Low-Cycle Fatigue Behavior and Microstructural Damage Mechanisms of 316L Austenitic Stainless Steel in Cryogenic Environments

作者：Guo, Sujuan[1];Zhang, Guolong[1];Chen, Junnan[1];Li, Lei[2];Zhang, Hui[2];Li, Qicong[1];Zhao, Jian[2,3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Natl Key Lab Strength & Struct Integr, Xian 710065, Peoples R China;[3]Tongji Univ, Sch Aerosp Engn & Appl Mech, Key Lab AI Aided Airworthiness Civil Aircraft Stru, Shanghai 201804, Peoples R China

年份：2026

卷号：19

期号：12

外文期刊名：MATERIALS

收录：;EI(收录号：20262621001749);WOS:【SCI-EXPANDED(收录号:WOS:001803168400001)】；

基金：This research work is supported by the National Natural Science Foundation of China (project nos. 52275151, 52575187, and 52175144) and the Foundation of the National Key Laboratory of Strength and Structural Integrity.

语种：英文

外文关键词：cryogenic environment; 316L stainless steel; low-cycle fatigue; microstructural mechanisms; fatigue failure

摘要：This study focuses on the low-cycle fatigue behavior and microstructural damage mechanisms of 316L austenitic stainless steel in cryogenic environments to enhance understanding of its fatigue performance and failure mechanisms over a wide temperature range. Uniaxial tensile and strain-controlled low-cycle fatigue tests were performed at 293 K, 173 K, and 77 K; microstructural evolution and damage mechanisms were explored via interrupted tests combined with multiple microscopic techniques and quantitative martensite analysis. The results show that the room temperature fatigue stress response has three stages, while low temperatures induce continuous cyclic hardening that stabilizes quickly; fatigue life increases with lower temperature and strain amplitude, more notably at high strains. Low temperatures enhance strength, increase hardness, slightly reduce plasticity, but maintain good toughness, suppressing crack initiation and propagation with ductile fracture. The findings clarify cryogenic fatigue damage mechanisms, providing experimental and theoretical support for cryogenic pressure-bearing component design and safety assessment.