| Quantifying contribution of hierarchically correlated shear microdomains underlying creep in metallic glass | |
Zhu, F1 ; Xing, GH1; Wang YJ(王云江)2,3; Pineda, E4; Qiao, JC1,5
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| Corresponding Author | Qiao, J. C.(qjczy@nwpu.edu.cn) |
| Source Publication | INTERNATIONAL JOURNAL OF PLASTICITY
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| 2024-03-01 | |
| Volume | 174Pages:18 |
| ISSN | 0749-6419 |
| Abstract | 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. |
| Keyword | Metallic glasses Hierarchical correlation Shear microdomains Structural relaxation Microstructural heterogeneity |
| DOI | 10.1016/j.ijplas.2024.103900 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001196519500001 |
| WOS Keyword | PLASTIC-DEFORMATION ; STRUCTURAL RELAXATION ; MECHANICAL-PROPERTIES ; SECONDARY RELAXATION ; FREE-VOLUME ; DYNAMICS ; MODEL ; DEFECTS ; HETEROGENEITY ; COMPOSITES |
| WOS Research Area | Engineering ; Materials Science ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics |
| Funding Project | 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 |
| Funding Organization | 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 |
| Classification | 一类 |
| Ranking | 3 |
| Contributor | Qiao, J. C. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94927 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Univ Politecn Cataluna, Inst Energy Technol, Dept Phys, Barcelona 08019, Spain; 5.Northwestern Polytech Univ, State Key Lab Clean & Efficient Turbomachinery Pow, Xian 710072, Peoples R China |
| Recommended Citation 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. |
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