| Microstructure evolution, crack initiation and early growth of high-strength martensitic steels subjected to fatigue loading | |
Rui SS(芮少石)1; Wei, Shaolou2; Sun CQ(孙成奇)1,3
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| Corresponding Author | Sun, Chengqi([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF FATIGUE
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| 2024-11-01 | |
| Volume | 188Pages:18 |
| ISSN | 0142-1123 |
| Abstract | 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. |
| Keyword | High-strength martensitic steels Fatigue loading Microstructure evolution Crack initiation and early growth |
| DOI | 10.1016/j.ijfatigue.2024.108534 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001294016600001 |
| WOS Keyword | HIGH-CYCLE FATIGUE ; DEFORMATION-BEHAVIOR ; FORMATION MECHANISM ; LIFE ; AREA ; ALLOYS ; REGION ; DAMAGE ; MODEL ; FGA |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary |
| Funding Project | National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics[11988102] |
| Funding Organization | National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Sun, Chengqi |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96359 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China; 2.Max Planck Inst Eisenforschung GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation 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.Rp_Au:Sun, Chengqi |
| 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. |
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