| Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15 | |
Li G(李根)1; Ke, Lei2; Peng, Wenjie3; Ren, Xuechong2; Sun CQ(孙成奇)1,4
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| 通讯作者 | Ren, Xuechong(Xcren@ustb.edu.cn) ; Sun, Chengqi(scq@lnm.imech.ac.cn) |
| 发表期刊 | THEORETICAL AND APPLIED FRACTURE MECHANICS
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| 2022-06-01 | |
| 卷号 | 119页码:10 |
| ISSN | 0167-8442 |
| 摘要 | Natural aging and variable amplitude loading are very common for structural parts subjected to fatigue loading. In this paper, ultrasonic frequency fatigue tests without intermittence were conducted to investigate the effects of natural aging and variable amplitude loading on very high cycle fatigue (VHCF) behavior of a high strength steel GCr15. It was shown that a natural aging of 10000 h prolonged the fatigue life of GCr15 steel in VHCF regime. The reason was that more granular carbides precipitated in the microstructure after the natural aging, and they strengthened the fatigue resistance of the material. The natural aging had no influence on the characteristics of the crack initiation and early growth region of GCr15 steel in VHCF regime. The effect of low loading in variable amplitude on fatigue life was related to its loading sequence, loading cycles and stress level. Under step loadings, the low loading with a number of cycles could reduce the fatigue life. The high loading in variable amplitude with a small number of cycles accelerated the crack initiation and growth. It could also change the fatigue failure mechanism to the one dominated by high loading. |
| 关键词 | GCr15 High strength steel Natural aging Variable amplitude loading Very high cycle fatigue Crack initiation |
| DOI | 10.1016/j.tafmec.2022.103360 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000796004400002 |
| 关键词[WOS] | SUBSURFACE CRACK INITIATION ; HIGH-STRENGTH STEEL ; GROWTH ; LIFE |
| WOS研究方向 | Engineering ; Mechanics |
| WOS类目 | Engineering, Mechanical ; Mechanics |
| 资助项目 | National Natural Science of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics[11988102] ; fund of International Postdoctoral Exchange Fellowship Program (China) |
| 项目资助者 | National Natural Science of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics ; fund of International Postdoctoral Exchange Fellowship Program (China) |
| 论文分区 | 二类/Q1 |
| 力学所作者排名 | 1 |
| RpAuthor | Ren, Xuechong ; Sun, Chengqi |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/89433 |
| 专题 | 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 Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China; 3.Baosteel Cent Res Inst, Wuhan 430080, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li G,Ke, Lei,Peng, Wenjie,et al. Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,119:10. |
| APA | 李根,Ke, Lei,Peng, Wenjie,Ren, Xuechong,&孙成奇.(2022).Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15.THEORETICAL AND APPLIED FRACTURE MECHANICS,119,10. |
| MLA | 李根,et al."Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15".THEORETICAL AND APPLIED FRACTURE MECHANICS 119(2022):10. |
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