理化检验-物理分册2025，Vol.61Issue(6)：20-25,6.DOI:10.11973/lhjy-wl240132
321和321H奥氏体不锈钢低周疲劳寿命的影响因素
Factors affecting low cycle fatigue life of 321 and 321H austenitic stainless steel
摘要
Abstract
The low cycle fatigue damage process of S321 and S321H austenitic stainless steel was studied,and the influence of carbon element content on their fatigue life was analyzed.The results show that at room temperature,the low cycle fatigue process of S321 and S321H steels went through four stages,initially mild cyclic hardening,less obvious saturation,rapid cyclic hardening,and final fracture.The materials also went through a cyclic softening stage at high temperature.As the mass fraction of carbon element increased,the content of deformation martensite in the material decreased and the fatigue life extended.As the strain amplitude increased,the content of deformation martensite in the material increased and the fatigue life shortened.S321H steel exhibited defects such as secondary cracks,second phase particles,and pores at higher strain amplitudes,resulted in a shortened fatigue life of the material.关键词
奥氏体不锈钢/低周疲劳/应变幅值/形变马氏体/疲劳寿命Key words
austenitic stainless steel/low cycle fatigue/strain amplitude/deformed martensite/fatigue life分类
通用工业技术引用本文复制引用
张玉刚,何国求,林媛..321和321H奥氏体不锈钢低周疲劳寿命的影响因素[J].理化检验-物理分册,2025,61(6):20-25,6.基金项目
国家重点研发计划资助项目(2021YFB3803004) （2021YFB3803004）
太原市关键核心技术攻关项目(20230224002) （20230224002）
