压力容器2011，Vol.28Issue(12)：5-10,6.DOI:10.3969/j.issn.1001-4837.2011.12.002
应变强化022Cr17Ni12Mo2奥氏体不锈钢室温低周疲劳性能研究
Study on Room Temperature Low- cycle Fatigue of Strain - strengthening Austenitic Stainless Steels 022Cr17Ni12Mo2
摘要
Abstract
The low cycle fatigue of strain - strengthening 022Crl7Nil2Mo2 austenitic stainless steel was investigated by MTS fatigue testing machine, optical microscopy, SEM, X - ray diffraction. The results show that the strain - strengthening samples exhibited much lower total strain fatigue life in comparison with the solution - treatment( ST) samples. ST and PSS samples showed initial hardening in the first three cycles and then softening,reached a saturation or stable response, except at a amplitude of 0. 25% in a 4% prior strain - strengthening samples and at a amplitude of 0. 25% ,0. 5% in the prior strain -strengthening 8% samples exhibited gradual softening from the beginning until the peak stress decreased rapidly due to the formation of macrocracks. Crack initiation and propagation modes were transgranular inboth ST and PSS samples. The low cycle fatigue life of materials could be predicted by Manson - Coffinequation.关键词
应变强化/低周疲劳/Manson-Coffin方程/022Cr17Ni12Mo2Key words
strain - strengthening/ low cycle fatigue/ Manson - coffin equation/022Cr17Ni12Mo2分类
机械制造引用本文复制引用
闫永超,陈学东,杨铁成,孔韦海,姜恒..应变强化022Cr17Ni12Mo2奥氏体不锈钢室温低周疲劳性能研究[J].压力容器,2011,28(12):5-10,6.基金项目
国家"863"计划先进制造技术领域重点项目"极端条件下重大承压设备的设计、制造与维护"(2009AA044800) （2009AA044800）
