| Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion | |
Li JH(李江华); Huang, Qinghui; Wang, Zhiyang; Zhang NY(张宁豫); Chen, Gang; Qian GA(钱桂安)
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| Corresponding Author | Wang, Zhiyang([email protected]) ; Qian, Guian([email protected]) |
| Source Publication | INTERNATIONAL JOURNAL OF PLASTICITY
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| 2023-12-01 | |
| Volume | 171Pages:15 |
| ISSN | 0749-6419 |
| Abstract | The microstructural sensitivity of fatigue short crack path and its propagation rate in a Ni-based superalloy GH4169 manufactured by laser powder bed fusion (LPBF) was investigated at room temperature. In-situ digital image correlation (DIC) observation and post-mortem microstructural analysis around the crack path were performed. The results show that the intragranular cracks developed in the shear cracking mode are closely aligned along the activated slip bands in the gamma-matrix grains with the crystallographic characteristics of parallel to the gamma-{111} slip planes. Multiple slip was also activated, causing the crack retardation or deflection. Low-angle grain boundaries and subgrain boundaries were shown to cause deflections of intragranular cracking, while high-angle grain boundaries significantly arrested the short crack propagation. Moreover, the resistance of grain boundaries to short cracking was assessed using combined metrics including the crystallographic and microstructural parameters of twist angle, the Schmid factor and the geometrical compatibility factor. These site-specific microstructural analyses around the crack path provide insights into the microstructural origins of resistance to the short crack propagation as well as an interpretation of the observed significant fluctuations in the crack propagation rate. |
| Keyword | Ni -based superalloy Fatigue short cracks Microstructure Propagation model |
| DOI | 10.1016/j.ijplas.2023.103800 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001111910600001 |
| WOS Keyword | LOW-CYCLE FATIGUE ; GRAIN-BOUNDARIES ; GROWTH ; BEHAVIOR ; INITIATION ; ALLOY |
| 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] ; National Science and Technology Major Project[J2019-VI-0012-0126] ; Science Center for Gas Turbine Project[P2022-B-III-008-001] ; China Postdoctoral Science Foundation[2021M693240] |
| Funding Organization | National Natural Science Foundation of China ; National Science and Technology Major Project ; Science Center for Gas Turbine Project ; China Postdoctoral Science Foundation |
| 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/311007/93573 |
| Collection | 非线性力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Li JH,Huang, Qinghui,Wang, Zhiyang,et al. Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2023,171:15.Rp_Au:Wang, Zhiyang, Qian, Guian |
| APA | 李江华,Huang, Qinghui,Wang, Zhiyang,张宁豫,Chen, Gang,&钱桂安.(2023).Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion.INTERNATIONAL JOURNAL OF PLASTICITY,171,15. |
| MLA | 李江华,et al."Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion".INTERNATIONAL JOURNAL OF PLASTICITY 171(2023):15. |
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| Jp2023Fa147.pdf（17525KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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