| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Structural evolution in deformation-induced rejuvenation in metallic glasses: A cavity perspective |
| Shaoqin Jiang(江少钦), Yong Huang(黄勇), Maozhi Li(李茂枝) |
| Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China |
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Abstract Classical molecular dynamics simulations have been performed to investigate the structural evolution in deformation-induced rejuvenation in Cu80Zr20 metallic glass. Metallic glasses obtained by different cooling rates can be rejuvenated into the glassy state with almost the same potential energy by compressive deformation. The aging effect in different metallic glasses in cooling process can be completely erased by the deformation-induced rejuvenation. The evolution of cavities has been analyzed to understand the structural evolution in rejuvenation. It is found that as metallic glasses are rejuvenated by mechanical deformation, a lot of cavities are created. The lower the potential energy is, the more the cavities are created. The cavities are mainly created in the regions without cavities or with small cavities populated, indicating that the irreversible rearrangements induced by deformation are accompanied by the creation of cavity. This finding elucidates the underlying structural basis for rejuvenation and aging in metallic glasses from the cavity perspective.
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Received: 24 January 2019
Revised: 22 February 2019
Accepted manuscript online:
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PACS:
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61.43.Dq
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(Amorphous semiconductors, metals, and alloys)
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64.70.pe
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(Metallic glasses)
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61.72.Qq
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(Microscopic defects (voids, inclusions, etc.))
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62.20.-x
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(Mechanical properties of solids)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51631003 and 51271197), the Ministry of Science and Technology (MOST) 973 Program, China (Grant No. 2015CB856800), the Fundamental Research Funds for the Central Universities, China, and the Research Funds of Renmin University of China (Grant No. 16XNLQ01). |
Corresponding Authors:
Maozhi Li
E-mail: maozhili@ruc.edu.cn
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Cite this article:
Shaoqin Jiang(江少钦), Yong Huang(黄勇), Maozhi Li(李茂枝) Structural evolution in deformation-induced rejuvenation in metallic glasses: A cavity perspective 2019 Chin. Phys. B 28 046103
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