Crack-tip plasticity mediated grain refinement and its resisting effect on the fatigue short crack growth
文献类型：期刊论文
| 作者 | Li, Jianghua3; Wang, Zhiyang2; Zhang, Ningyu3; Shi, Tao3; Gilbert, Elliot P.2; Chen, Gang1; Qian, Guian3 ; Qian GA(钱桂安)
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| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
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| 出版日期 | 2024-10-01 |
| 卷号 | 181页码:14 |
| 关键词 | High cycle fatigue Fatigue short crack Crack propagation Grain refinement Nanoprecipitation Ni-based superalloy |
| ISSN号 | 0749-6419 |
| DOI | 10.1016/j.ijplas.2024.104102 |
| 通讯作者 | Wang, Zhiyang(zhiyangw@ansto.gov.au) ; Qian, Guian(qianguian@imech.ac.cn) |
| 英文摘要 | Fatigue short crack growth governed by the crack-tip plasticity dominates the fatigue life and strength of metallic materials or structural components. Here, for the first time, we discover a new mechanism of resisting fatigue short crack growth by grain refinement near the crack-tip driven by dynamic recrystallization in a Ni-based superalloy during high-cycle fatigue. The local cumulative plastic strain plays a determining role in the crack-tip grain refinement and concurrent dissolution of nanoprecipitation. Comprehensive microstructural analysis provides the evidence that the refined grains reduce the plastic micro-strain gradient in the vicinity of the crack-tip, which causes the crack blunting and deflection towards the interface of coarse-fine grains, hence decelerating the short crack growth. Although the grain refinement reduces the local stress threshold in the fine-grained areas (FGA), the dominant effects of FGA are identified to provide additional microstructural resistance to the propagation of short cracks. |
| WOS关键词 | HIGH-CYCLE FATIGUE ; HIGH-STRENGTH STEELS ; DYNAMIC RECRYSTALLIZATION ; FORMATION MECHANISM ; INITIATION ; PROPAGATION ; LIFE ; BEHAVIOR ; TI-6AL-4V ; FAILURE |
| 资助项目 | National Natural Science Foundation of China[12072345] ; National Natural Science Foundation of China[11932020] ; National Natural Science Foundation of China[12202444] |
| WOS研究方向 | Engineering ; Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001311488000001 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/96572]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Wang, Zhiyang; Qian, Guian |
| 作者单位 | 1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin, Peoples R China 2.Australian Nucl Sci & Technol Org ANSTO, Sydney, NSW 2234, Australia 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jianghua,Wang, Zhiyang,Zhang, Ningyu,et al. Crack-tip plasticity mediated grain refinement and its resisting effect on the fatigue short crack growth[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2024,181:14. |
| APA | Li, Jianghua.,Wang, Zhiyang.,Zhang, Ningyu.,Shi, Tao.,Gilbert, Elliot P..,...&钱桂安.(2024).Crack-tip plasticity mediated grain refinement and its resisting effect on the fatigue short crack growth.INTERNATIONAL JOURNAL OF PLASTICITY,181,14. |
| MLA | Li, Jianghua,et al."Crack-tip plasticity mediated grain refinement and its resisting effect on the fatigue short crack growth".INTERNATIONAL JOURNAL OF PLASTICITY 181(2024):14. |
入库方式： OAI收割
来源：力学研究所
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