Grain boundary phase transformation in a CrCoNi complex concentrated alloy
文献类型：期刊论文
| 作者 | Cao, Fuhua2,4; Chen, Yan2,4; Zhao, Shiteng1; Ma, En4; Dai, Lanhong2,3,4; Cao FH(曹富华) ; Dai LH(戴兰宏); Chen Y(陈艳)
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| 刊名 | ACTA MATERIALIA
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| 出版日期 | 2021-05-01 |
| 卷号 | 209页码:13 |
| 关键词 | Grain boundary Structural transformation Medium-entropy alloy Local chemical order Diffusion |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2021.116786 |
| 通讯作者 | Dai, Lanhong(lhdai@lnm.imech.ac.cn) |
| 英文摘要 | The phase-transformation-like behavior of grain boundaries, where their chemistry, structure and properties change discontinuously, is emerging as a fundamental interest in the context of grain boundary engineering. The cases studied so far pertain primarily to elemental metals and dilute alloy systems. The next step of complexity would be a system still of a single phase structure but involving multiple and concentrated elements. The recently emerging high/medium entropy alloys (H/MEAs), alternatively known as complex concentration alloys (CCAs), fit the bill in this regard. Here we use CoCrNi as a model CCA to highlight that intricate interatomic interactions influence the grain boundary element distribution and consequently phase transitions. By combining classical molecular dynamics simulations and first-principles density functional theory calculations, we reveal that grain boundary phase transition temperature is sensitive to the grain boundary atomic configuration. The CCA grain boundary with random atomic distribution is more apt to transform due to a larger thermodynamic driving force and faster diffusion kinetics, compared to a hypothetical reference that bears the same bulk properties but no distinguishable constituent components. In contrast, when the three elements redistribute with local Ni-clustering and Co & ndash;Cr ordering in the grain boundary structure, diffusion is rendered more sluggish, delaying grain boundary phase transformation. Our work is a step forward in understanding critical phenomena in grain boundaries and CCAs, and enriches the knowledge base for materials design via grain boundary engineering. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 资助项目 | National Key Research and Development Program of China[2017YFB0702003] ; NSFC Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics[11988102] ; NSFC[11790292] ; NSFC[11972346] ; Strategic Priority Research Program[XDB22040302] ; Strategic Priority Research Program[XDB22040303] ; Key Research Program of Frontier Sciences[QYZDJSSW-JSC011] ; Science Challenge Project[TZ2016001] ; opening project of State Key Laboratory of Explosion Science and Technology |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000641587500008 |
| 资助机构 | National Key Research and Development Program of China ; NSFC Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics ; NSFC ; Strategic Priority Research Program ; Key Research Program of Frontier Sciences ; Science Challenge Project ; opening project of State Key Laboratory of Explosion Science and Technology |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/86518]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Dai, Lanhong |
| 作者单位 | 1.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 3.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Fuhua,Chen, Yan,Zhao, Shiteng,et al. Grain boundary phase transformation in a CrCoNi complex concentrated alloy[J]. ACTA MATERIALIA,2021,209:13. |
| APA | Cao, Fuhua.,Chen, Yan.,Zhao, Shiteng.,Ma, En.,Dai, Lanhong.,...&陈艳.(2021).Grain boundary phase transformation in a CrCoNi complex concentrated alloy.ACTA MATERIALIA,209,13. |
| MLA | Cao, Fuhua,et al."Grain boundary phase transformation in a CrCoNi complex concentrated alloy".ACTA MATERIALIA 209(2021):13. |
入库方式： OAI收割
来源：力学研究所
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