铸造技术2025，Vol.46Issue(5)：458-463,6.DOI:10.16410/j.issn1000-8365.2025.5014
疲劳损伤奥氏体304不锈钢组织与性能的关联性
Correlation between the Microstructure and Properties of Fatigue-damaged Austenitic 304 Stainless Steel
摘要
Abstract
Metastable austenitic 304 stainless steel is widely used in the field of nuclear power,but it is prone to fatigue damage and affects the service life;thus,it is crucial to assess the fatigue damage during service via nondestructive testing meansmethods.The correlations among the microstructure,Vickers hardness,and saturation magnetization of 304 stainless steel under different fatigue cycles were investigated via X-ray diffraction,electron backscatter diffraction,hardness,and magnetic property testing.The experimental results show that with increasing number of fatigue cycles,304 stainless steel transforms from the austenite phase to the martensite phase,and the martensite phase content continues to increase;the dislocation density increases rapidly during the fatigue process from 0 to 1 cycle and remains relatively constant thereafter.The martensite content and number of dislocations affect the Vickers hardness of 304 stainless steel during 0 to 1 cycle of the fatigue process;as the number of fatigue cycles further increases,the increase in the Vickers hardness is related to only the increase in the martensite content,and a linear relationship exists between them.The saturation magnetization of 304 stainless steel is associated with the martensite content in the steel,and there is also a linear relationship between the two.关键词
304不锈钢/疲劳损伤/马氏体相变/维氏硬度/饱和磁化强度Key words
304 stainless steel/fatigue damage/martensitic transformation/Vickers hardness/saturation magnetization分类
金属材料引用本文复制引用
张孟浩,支辉辉,王维俊,罗皎,王海丰..疲劳损伤奥氏体304不锈钢组织与性能的关联性[J].铸造技术,2025,46(5):458-463,6.基金项目
国家重点研发计划(2022YFB3707201) （2022YFB3707201）
国家自然科学基金(52201141) （52201141）
广东省基础与应用基础研究基金(2021A1515110692) （2021A1515110692）
重庆市自然科学基金(cstc2021jcyj-msxmX1189) （cstc2021jcyj-msxmX1189）
中国博士后科学基金(2021M702662) （2021M702662）
中央高校基本科研业务费专项资金(G2024KY05101) （G2024KY05101）
