Quantifying contribution of hierarchically correlated shear microdomains underlying creep in metallic glass
文献类型：期刊论文
| 作者 | Zhu, F5 ; Xing, GH5; Wang YJ(王云江)3,4; Pineda, E2; Qiao, JC1,5
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| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
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| 出版日期 | 2024-03-01 |
| 卷号 | 174页码:18 |
| 关键词 | Metallic glasses Hierarchical correlation Shear microdomains Structural relaxation Microstructural heterogeneity |
| ISSN号 | 0749-6419 |
| DOI | 10.1016/j.ijplas.2024.103900 |
| 通讯作者 | Qiao, J. C.(qjczy@nwpu.edu.cn) |
| 英文摘要 | Investigation of the strain evolution of a Cu46Zr47Al7 metallic glass (MG) was conducted through creep deformation encompassing various temperature and stress conditions. The fundamental framework of atomic motion was established through hierarchically dynamic correlation. By discerning a transition in strain rate from three to two regions under cyclic loading conditions, we effectively identified the two underlying mechanisms of creep. The initial deformation mechanism is associated with tau-defects (shear microdomains, SMDs) characterized by a high degree of atomic correlation. This mechanism entails both reversible deformation within a short temporal span and irreversible deformation over an extended duration. Remarkably, the atomic correlation of SMDs remains nearly unaffected by variations in stress and temperature. Furthermore, a fundamental intrinsic correlation emerges between the atomic correlation of SMDs and the defect concentration as ascertained through the framework of quasi-point defect (QPD) theory. The second deformation mechanism entails irreversible deformation attributed to structural relaxation, exhibiting a relatively diminished atomic correlation. In this mechanism, the correlation of atomic motion exhibits a decline with rising temperatures, while remaining relatively less influenced by mechanical effects. Meanwhile, after annealing treatment, the deformation strength associated with structural relaxation significantly decreases. Our study sheds light on the underlying mechanisms of creep in MGs, compensates for the shortcomings of QPD theory in describing long-term creep and provides insights into the fundamental atomic-scale processes governing the mechanical behavior of MGs. |
| 分类号 | 一类 |
| WOS关键词 | PLASTIC-DEFORMATION ; STRUCTURAL RELAXATION ; MECHANICAL-PROPERTIES ; SECONDARY RELAXATION ; FREE-VOLUME ; DYNAMICS ; MODEL ; DEFECTS ; HETEROGENEITY ; COMPOSITES |
| 资助项目 | NSFC[12072344] ; Natural Science Basic Research Plan for Distin- guished Young Scholars in Shaanxi Province[2021JC-12] ; Fundamental Research Funds for the Central Universities[D5000220034] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences |
| WOS研究方向 | Engineering ; Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001196519500001 |
| 资助机构 | NSFC ; Natural Science Basic Research Plan for Distin- guished Young Scholars in Shaanxi Province ; Fundamental Research Funds for the Central Universities ; Youth Innovation Promotion Association of the Chinese Academy of Sciences |
| 其他责任者 | Qiao, J. C. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/94926]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Northwestern Polytech Univ, State Key Lab Clean & Efficient Turbomachinery Pow, Xian 710072, Peoples R China 2.Univ Politecn Cataluna, Inst Energy Technol, Dept Phys, Barcelona 08019, Spain; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 5.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhu, F,Xing, GH,Wang YJ,et al. Quantifying contribution of hierarchically correlated shear microdomains underlying creep in metallic glass[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2024,174:18. |
| APA | Zhu, F,Xing, GH,王云江,Pineda, E,&Qiao, JC.(2024).Quantifying contribution of hierarchically correlated shear microdomains underlying creep in metallic glass.INTERNATIONAL JOURNAL OF PLASTICITY,174,18. |
| MLA | Zhu, F,et al."Quantifying contribution of hierarchically correlated shear microdomains underlying creep in metallic glass".INTERNATIONAL JOURNAL OF PLASTICITY 174(2024):18. |
入库方式： OAI收割
来源：力学研究所
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