| Chemical inhomogeneity inhibits grain boundary fracture: A comparative study in CrCoNi medium entropy alloy | |
Cao FH(曹富华) ; Chen Y(陈艳); Wang HY(汪海英); Dai LH(戴兰宏)
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| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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| 2023-08-01 | |
| Volume | 153Pages:228-241 |
| ISSN | 1005-0302 |
| Abstract | Grain boundary (GB) fracture is arguably one of the most important reasons for the catastrophic failure of ductile polycrystalline materials. It is of interest to explore the role of chemical distribution on GB defor mation and fracture, as GB segregation becomes a key strategy for tailoring GB properties. Here we report that the inhomogeneous chemical distribution effectively inhibits GB fracture in a model CoCrNi medium entropy alloy compared to a so called 'average atom' sample. Atomic deformation kinematics combined with electronic behavior analysis reveals that the strong charge redistribution ability in chemical disor dered CrCoNi GBs enhances shear deformation and thus prevents GB crack formation and propagation. Inspects on the GBs with different chemical components and chemical distributions suggest that not only disordered chemical distribution but also sufficient harmonic elements with large electronic flexibility contribute to improving the GB fracture resistance. This study provides new insight into the influence mechanism of GB chemistry on fracture behavior, and yields a systematic strategy and criterion, from the atoms and electrons level, forward in the design of high performance materials with enhanced GB fracture resistance.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Fracture Chemical inhomogeneity Grain boundary Medium entropy alloy |
| DOI | 10.1016/j.jmst.2023.02.002 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000955589200001 |
| WOS Research Area | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science ; Metallurgy & Metallurgical Engineering |
| Funding Organization | National Natural Science Foundation of China (NSFC) [12102433, U2241285, 11972346, U2141204] ; NSFC Basic Science Center Program for Multi scale Problems in Nonlinear Mechanics [11988102] ; Key Research Program of the Chinese Academy of Sciences [ZDRW CN 2021 2 3] |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Chen, Y ; Dai, LH (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Chen, Y ; Dai, LH (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China. ; Dai, LH (corresponding author), Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91853 |
| 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, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 3.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Cao FH,Chen Y,Wang HY,et al. Chemical inhomogeneity inhibits grain boundary fracture: A comparative study in CrCoNi medium entropy alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,153:228-241.Rp_Au:Chen, Y, Dai, LH (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China., Chen, Y, Dai, LH (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China., Dai, LH (corresponding author), Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China. |
| APA | 曹富华,陈艳,汪海英,&戴兰宏.(2023).Chemical inhomogeneity inhibits grain boundary fracture: A comparative study in CrCoNi medium entropy alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,153,228-241. |
| MLA | 曹富华,et al."Chemical inhomogeneity inhibits grain boundary fracture: A comparative study in CrCoNi medium entropy alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 153(2023):228-241. |
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| Jp2023Fa192.pdf（9353KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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