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Relaxation and Strain-Hardening Relationships in Highly Rejuvenated Metallic Glasses

Yuan, Xudong ; Şopu, Daniel ; Song, Kaikai ; Eckert, Jürgen (2022)
Relaxation and Strain-Hardening Relationships in Highly Rejuvenated Metallic Glasses.
In: Materials, 2022, 15 (5)
doi: 10.26083/tuprints-00021024
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Relaxation and Strain-Hardening Relationships in Highly Rejuvenated Metallic Glasses
Language: English
Date: 11 April 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Materials
Volume of the journal: 15
Issue Number: 5
Collation: 10 Seiten
DOI: 10.26083/tuprints-00021024
Corresponding Links:
Origin: Secondary publication DeepGreen

One way to rejuvenate metallic glasses is to increase their free volume. Here, by randomly removing atoms from the glass matrix, free volume is homogeneously generated in metallic glasses, and glassy states with different degrees of rejuvenation are designed and further mechanically tested. We find that the free volume in the rejuvenated glasses can be annihilated under tensile or compressive deformation that consequently leads to structural relaxation and strain-hardening. Additionally, the deformation mechanism of highly rejuvenated metallic glasses during the uniaxial loading–unloading tensile tests is investigated, in order to provide a systematic understanding of the relaxation and strain-hardening relationship. The observed strain-hardening in the highly rejuvenated metallic glasses corresponds to stress-driven structural and residual stress relaxation during cycling deformation. Nevertheless, the rejuvenated metallic glasses relax to a more stable state but could not recover their initial as-cast state.

Uncontrolled Keywords: metallic glass, molecular dynamics simulations, rejuvenation, relaxation, strain-hardening
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-210249
Classification DDC: 500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 11 Apr 2022 11:24
Last Modified: 14 Nov 2023 19:04
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21024
PPN: 500770794
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