| Crack-tip plasticity mediated grain refinement and its resisting effect on the fatigue short crack growth | |
Li JH(李江华)1; Wang, Zhiyang2; Zhang NY(张宁豫)1; Shi T(时涛)1; Gilbert, Elliot P2; Chen, Gang3; Qian GA(钱桂安)1
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| Corresponding Author | Wang, Zhiyang([email protected]) ; Qian, Guian([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF PLASTICITY
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| 2024-10-01 | |
| Volume | 181Pages:14 |
| ISSN | 0749-6419 |
| Abstract | 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. |
| Keyword | High cycle fatigue Fatigue short crack Crack propagation Grain refinement Nanoprecipitation Ni-based superalloy |
| DOI | 10.1016/j.ijplas.2024.104102 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001311488000001 |
| WOS Keyword | HIGH-CYCLE FATIGUE ; HIGH-STRENGTH STEELS ; DYNAMIC RECRYSTALLIZATION ; FORMATION MECHANISM ; INITIATION ; PROPAGATION ; LIFE ; BEHAVIOR ; TI-6AL-4V ; FAILURE |
| WOS Research Area | Engineering ; Materials Science ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics |
| Funding Project | National Natural Science Foundation of China[12072345] ; National Natural Science Foundation of China[11932020] ; National Natural Science Foundation of China[12202444] |
| Funding Organization | National Natural Science Foundation of China |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Wang, Zhiyang ; Qian, Guian |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96573 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China; 2.Australian Nucl Sci & Technol Org ANSTO, Sydney, NSW 2234, Australia; 3.Tianjin Univ, Sch Chem Engn & Technol, Tianjin, Peoples R China |
| Recommended Citation GB/T 7714 | Li JH,Wang, Zhiyang,Zhang NY,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.Rp_Au:Wang, Zhiyang, Qian, Guian |
| APA | 李江华.,Wang, Zhiyang.,张宁豫.,时涛.,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 | 李江华,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. |
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