Microstructure evolution, crack initiation and early growth of high-strength martensitic steels subjected to fatigue loading
文献类型：期刊论文
| 作者 | Rui SS(芮少石)3; Wei, Shaolou2; Sun CQ(孙成奇)1,3
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| 刊名 | INTERNATIONAL JOURNAL OF FATIGUE
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| 出版日期 | 2024-11-01 |
| 卷号 | 188页码:18 |
| 关键词 | High-strength martensitic steels Fatigue loading Microstructure evolution Crack initiation and early growth |
| ISSN号 | 0142-1123 |
| DOI | 10.1016/j.ijfatigue.2024.108534 |
| 通讯作者 | Sun, Chengqi(scq@lnm.imech.ac.cn) |
| 英文摘要 | Fatigue loading induced microstructure evolution featured by Fine Granular Area (FGA) in high-strength martensitic steels have close ties to the fatigue crack initiation and early growth, which are worthy of being investigated. On this issue, we conducted Very High Cycle Fatigue (VHCF), High Cycle Fatigue (HCF) and Low Cycle Fatigue (LCF) tests on three different types of specimens. Combined with post-mortem/quasi in-situ Scanning Electron Microscope (SEM) and Electron Back-Scattered Diffraction (EBSD) observations, as well as further Transmission Kikuchi Diffraction (TKD) and Transmission Electron Microscope (TEM) analyses, we captured two different types of microstructure evolution behaviors during the fatigue loading. One is the "dynamic precipitation", a kind of phase transformation from martensitic matrix (BCC) to Nb- and Mo-rich small carbides (MC, M7C3) 7 C 3 ) accelerated by repeated slight plastic deformation, whose formation does not rely on the stress concentration effect and also has no ties to the plastic strain localization and fatigue crack initiation. Another is the "local grain refinement" around those stress singularities (crack tip, or interior inclusion) generating substantial amounts of fine sub-grains in VHCF, HCF and LCF regimes, which can then promote fatigue crack initiation and early growth along sub-grain boundaries, fine/coarse grain boundaries and martensitic packet boundaries. |
| 分类号 | 一类 |
| WOS关键词 | HIGH-CYCLE FATIGUE ; DEFORMATION-BEHAVIOR ; FORMATION MECHANISM ; LIFE ; AREA ; ALLOYS ; REGION ; DAMAGE ; MODEL ; FGA |
| 资助项目 | National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics[11988102] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001294016600001 |
| 资助机构 | National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics |
| 其他责任者 | Sun, Chengqi |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/96358]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Max Planck Inst Eisenforschung GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany; 3.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Rui SS,Wei, Shaolou,Sun CQ. Microstructure evolution, crack initiation and early growth of high-strength martensitic steels subjected to fatigue loading[J]. INTERNATIONAL JOURNAL OF FATIGUE,2024,188:18. |
| APA | 芮少石,Wei, Shaolou,&孙成奇.(2024).Microstructure evolution, crack initiation and early growth of high-strength martensitic steels subjected to fatigue loading.INTERNATIONAL JOURNAL OF FATIGUE,188,18. |
| MLA | 芮少石,et al."Microstructure evolution, crack initiation and early growth of high-strength martensitic steels subjected to fatigue loading".INTERNATIONAL JOURNAL OF FATIGUE 188(2024):18. |
入库方式： OAI收割
来源：力学研究所
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