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Effects of Natural Aging and Discontinuous Cyclic Loading on High Cycle Fatigue Behavior of Steels

文献类型：期刊论文

作者Li G(李根); Liu, Jiajun1; Sun, Jian1; Sun CQ(孙成奇)
刊名METALS
出版日期2023-03
卷号13期号:3页码:511
关键词natural aging discontinuous loading steels high cycle fatigue failure mechanism
DOI10.3390/met13030511
英文摘要Metallic components may not be used immediately and are stored for several months or years after fabrication in some cases, which experience long term natural aging. Moreover, the fatigue beared components commonly suffer discontinuous cyclic loadings in service. In this paper, the effects of natural aging and discontinuous loading on high cycle fatigue life and failure mechanism were investigated through rotating bending fatigue tests. The long term natural aging (e.g., more than 20,000 h) reduced the fatigue life of both 25CrMo4 and 30CrMnSiA steels, and this effect was irrespective of the roughness of the specimen surface. The effect of natural aging on the failure mechanism was related to the microstructure of materials. The natural aging promoted the probability of multi site crack initiation for 25CrMo4 steel, but had no influence on the crack initiation mode of 30CrMnSiA steel. The discontinuous cyclic loading had no harmful influence on the fatigue life of 25CrMo4 steel, and it had no influence on the failure mechanism. The specimens under continuous and discontinuous cyclic loadings both failed from single site crack initiation or multi site crack initiation at the specimen surface.
分类号二类
WOS研究方向Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000959640600001
资助机构National Natural Science Foundation of China Basic Science Center [11988102] ; International Postdoctoral Exchange Fellowship Program (China)
其他责任者Sun, CQ (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Sun, CQ (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
源URL[http://dspace.imech.ac.cn/handle/311007/91792]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li G,Liu, Jiajun,Sun, Jian,et al. Effects of Natural Aging and Discontinuous Cyclic Loading on High Cycle Fatigue Behavior of Steels[J]. METALS,2023,13(3):511.
APA 李根,Liu, Jiajun,Sun, Jian,&孙成奇.(2023).Effects of Natural Aging and Discontinuous Cyclic Loading on High Cycle Fatigue Behavior of Steels.METALS,13(3),511.
MLA 李根,et al."Effects of Natural Aging and Discontinuous Cyclic Loading on High Cycle Fatigue Behavior of Steels".METALS 13.3(2023):511.

入库方式： OAI收割

来源：力学研究所

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