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Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses

We theoretically investigate high-pressure effects on the atomic dynamics of metallic glasses. The theory predicts compression-induced rejuvenation and the resulting strain hardening that have been recently observed in metallic glasses. Structural relaxation under pressure is mainly governed by loca...

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Main Authors: Anh D. Phan, Alessio Zaccone, Vu D. Lam, Katsunori Wakabayashi
Format: Bài trích
Language:eng
Published: PHYSICAL REVIEW LETTERS 2021
Online Access:https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.025502
https://dlib.phenikaa-uni.edu.vn/handle/PNK/2827
https://doi.org/10.1103/PhysRevLett.126.025502
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spelling oai:localhost:PNK-28272022-08-17T05:54:46Z Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses Anh D. Phan Alessio Zaccone Vu D. Lam Katsunori Wakabayashi We theoretically investigate high-pressure effects on the atomic dynamics of metallic glasses. The theory predicts compression-induced rejuvenation and the resulting strain hardening that have been recently observed in metallic glasses. Structural relaxation under pressure is mainly governed by local cage dynamics. The external pressure restricts the dynamical constraints and slows down the atomic mobility. In addition, the compression induces a rejuvenated metastable state (local minimum) at a higher energy in the free-energy landscape. Thus, compressed metallic glasses can rejuvenate and the corresponding relaxation is reversible. This behavior leads to strain hardening in mechanical deformation experiments. Theoretical predictions agree well with experiments. 2021-09-13T04:24:48Z 2021-09-13T04:24:48Z 2021 Bài trích https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.025502 https://dlib.phenikaa-uni.edu.vn/handle/PNK/2827 https://doi.org/10.1103/PhysRevLett.126.025502 eng PHYSICAL REVIEW LETTERS
institution Digital Phenikaa
collection Digital Phenikaa
language eng
description We theoretically investigate high-pressure effects on the atomic dynamics of metallic glasses. The theory predicts compression-induced rejuvenation and the resulting strain hardening that have been recently observed in metallic glasses. Structural relaxation under pressure is mainly governed by local cage dynamics. The external pressure restricts the dynamical constraints and slows down the atomic mobility. In addition, the compression induces a rejuvenated metastable state (local minimum) at a higher energy in the free-energy landscape. Thus, compressed metallic glasses can rejuvenate and the corresponding relaxation is reversible. This behavior leads to strain hardening in mechanical deformation experiments. Theoretical predictions agree well with experiments.
format Bài trích
author Anh D. Phan
Alessio Zaccone
Vu D. Lam
Katsunori Wakabayashi
spellingShingle Anh D. Phan
Alessio Zaccone
Vu D. Lam
Katsunori Wakabayashi
Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses
author_facet Anh D. Phan
Alessio Zaccone
Vu D. Lam
Katsunori Wakabayashi
author_sort Anh D. Phan
title Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses
title_short Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses
title_full Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses
title_fullStr Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses
title_full_unstemmed Theory of Pressure-Induced Rejuvenation and Strain Hardening in Metallic Glasses
title_sort theory of pressure-induced rejuvenation and strain hardening in metallic glasses
publisher PHYSICAL REVIEW LETTERS
publishDate 2021
url https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.025502
https://dlib.phenikaa-uni.edu.vn/handle/PNK/2827
https://doi.org/10.1103/PhysRevLett.126.025502
_version_ 1751856264322744320
score 8.881002

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