A nanoindentation study of Ti-based high entropy bulk metallic glasses at elevated temperatures

Qing Zhou; Yin Du; Qian Jia; Weichao Han; Xiaoxing Zhao; Yuyu Deng; Haifeng Wang

doi:10.1016/j.jnoncrysol.2019.119878

A nanoindentation study of Ti-based high entropy bulk metallic glasses at elevated temperatures

Qing Zhou, Yin Du, Qian Jia, Weichao Han, Xiaoxing Zhao, Yuyu Deng, Haifeng Wang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Nanoindentation was used to explore the mechanical properties of high entropy bulk metallic glasses (HE-BMGs) from room to elevated temperatures. Two Ti-based HE-BMGs and two conventional counterparts were investigated. Below the glass transition temperature, softening is observed for conventional BMGs with increasing temperature, whereas hardness keeps almost unchanged for HE-BMGs. The resistance to thermal softening might originate from the highly stable high entropy structure, which retards atomic diffusion and rearrangement for shear transformation. Above the glass transition temperature, HE-BMGs show quite low hardness and pronounced creep deformation, suggesting that high entropy may facilitate fast diffusion in the viscous flow.

Original language	English
Article number	119878
Journal	Journal of Non-Crystalline Solids
Volume	532
DOIs	https://doi.org/10.1016/j.jnoncrysol.2019.119878
State	Published - 15 Mar 2020

Keywords

Bulk metallic glasses
Elevated temperatures
High entropy
Nanoindentation

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10.1016/j.jnoncrysol.2019.119878

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title = "A nanoindentation study of Ti-based high entropy bulk metallic glasses at elevated temperatures",

abstract = "Nanoindentation was used to explore the mechanical properties of high entropy bulk metallic glasses (HE-BMGs) from room to elevated temperatures. Two Ti-based HE-BMGs and two conventional counterparts were investigated. Below the glass transition temperature, softening is observed for conventional BMGs with increasing temperature, whereas hardness keeps almost unchanged for HE-BMGs. The resistance to thermal softening might originate from the highly stable high entropy structure, which retards atomic diffusion and rearrangement for shear transformation. Above the glass transition temperature, HE-BMGs show quite low hardness and pronounced creep deformation, suggesting that high entropy may facilitate fast diffusion in the viscous flow.",

keywords = "Bulk metallic glasses, Elevated temperatures, High entropy, Nanoindentation",

author = "Qing Zhou and Yin Du and Qian Jia and Weichao Han and Xiaoxing Zhao and Yuyu Deng and Haifeng Wang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

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doi = "10.1016/j.jnoncrysol.2019.119878",

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TY - JOUR

T1 - A nanoindentation study of Ti-based high entropy bulk metallic glasses at elevated temperatures

AU - Zhou, Qing

AU - Du, Yin

AU - Jia, Qian

AU - Han, Weichao

AU - Zhao, Xiaoxing

AU - Deng, Yuyu

AU - Wang, Haifeng

PY - 2020/3/15

Y1 - 2020/3/15

N2 - Nanoindentation was used to explore the mechanical properties of high entropy bulk metallic glasses (HE-BMGs) from room to elevated temperatures. Two Ti-based HE-BMGs and two conventional counterparts were investigated. Below the glass transition temperature, softening is observed for conventional BMGs with increasing temperature, whereas hardness keeps almost unchanged for HE-BMGs. The resistance to thermal softening might originate from the highly stable high entropy structure, which retards atomic diffusion and rearrangement for shear transformation. Above the glass transition temperature, HE-BMGs show quite low hardness and pronounced creep deformation, suggesting that high entropy may facilitate fast diffusion in the viscous flow.

AB - Nanoindentation was used to explore the mechanical properties of high entropy bulk metallic glasses (HE-BMGs) from room to elevated temperatures. Two Ti-based HE-BMGs and two conventional counterparts were investigated. Below the glass transition temperature, softening is observed for conventional BMGs with increasing temperature, whereas hardness keeps almost unchanged for HE-BMGs. The resistance to thermal softening might originate from the highly stable high entropy structure, which retards atomic diffusion and rearrangement for shear transformation. Above the glass transition temperature, HE-BMGs show quite low hardness and pronounced creep deformation, suggesting that high entropy may facilitate fast diffusion in the viscous flow.

KW - Bulk metallic glasses

KW - Elevated temperatures

KW - High entropy

KW - Nanoindentation

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U2 - 10.1016/j.jnoncrysol.2019.119878

DO - 10.1016/j.jnoncrysol.2019.119878

M3 - 文章

AN - SCOPUS:85078180068

SN - 0022-3093

VL - 532

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

M1 - 119878

ER -

A nanoindentation study of Ti-based high entropy bulk metallic glasses at elevated temperatures

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Keywords

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