New evidences for understanding the serrated flow and shear band behavior in nanoindentation of metallic glasses

Hu Huang; Minqiang Jiang; Jiwang Yan

doi:10.1016/j.jallcom.2020.157587

New evidences for understanding the serrated flow and shear band behavior in nanoindentation of metallic glasses

Hu Huang, Minqiang Jiang, Jiwang Yan

Department of Mechanical Engineering

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

1 Citation (Scopus)

Abstract

Nanoindentation of a Zr-based metallic glass was performed under various loading rates by using a cube-corner indenter. Experimental results showed that increasing the loading rate from 2 to 20 mN/s, the size of serrated flow was greatly weakened, but the number of serrated flow kept very stable, together with very similar shear band features around the residual indents. These results challenge the current understanding derived from the results obtained by using the Berkovich indenter, and can be well explained by the shear-band propagation dynamics model, i.e., loading rate impeded the propagation of shear band rather than its nucleation.

Original language	English
Article number	157587
Journal	Journal of Alloys and Compounds
Volume	857
DOIs	https://doi.org/10.1016/j.jallcom.2020.157587
Publication status	Published - 2021 Mar 15

Keywords

Bulk metallic glass
Nanoindentation
Serrated flow
Shear band

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "New evidences for understanding the serrated flow and shear band behavior in nanoindentation of metallic glasses",

abstract = "Nanoindentation of a Zr-based metallic glass was performed under various loading rates by using a cube-corner indenter. Experimental results showed that increasing the loading rate from 2 to 20 mN/s, the size of serrated flow was greatly weakened, but the number of serrated flow kept very stable, together with very similar shear band features around the residual indents. These results challenge the current understanding derived from the results obtained by using the Berkovich indenter, and can be well explained by the shear-band propagation dynamics model, i.e., loading rate impeded the propagation of shear band rather than its nucleation.",

keywords = "Bulk metallic glass, Nanoindentation, Serrated flow, Shear band",

author = "Hu Huang and Minqiang Jiang and Jiwang Yan",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant No. 51705197 ), Science and Technology Project from the Education Department of Jilin Province (Grant No. JJKH20190014KJ ), and Young Elite Scientists Sponsorship Program by CAST (YESS) (Grant No. 2017QNRC001 ). Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

month = mar,

day = "15",

doi = "10.1016/j.jallcom.2020.157587",

language = "English",

volume = "857",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

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T1 - New evidences for understanding the serrated flow and shear band behavior in nanoindentation of metallic glasses

AU - Huang, Hu

AU - Jiang, Minqiang

AU - Yan, Jiwang

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant No. 51705197 ), Science and Technology Project from the Education Department of Jilin Province (Grant No. JJKH20190014KJ ), and Young Elite Scientists Sponsorship Program by CAST (YESS) (Grant No. 2017QNRC001 ). Publisher Copyright: © 2020 Elsevier B.V.

PY - 2021/3/15

Y1 - 2021/3/15

N2 - Nanoindentation of a Zr-based metallic glass was performed under various loading rates by using a cube-corner indenter. Experimental results showed that increasing the loading rate from 2 to 20 mN/s, the size of serrated flow was greatly weakened, but the number of serrated flow kept very stable, together with very similar shear band features around the residual indents. These results challenge the current understanding derived from the results obtained by using the Berkovich indenter, and can be well explained by the shear-band propagation dynamics model, i.e., loading rate impeded the propagation of shear band rather than its nucleation.

AB - Nanoindentation of a Zr-based metallic glass was performed under various loading rates by using a cube-corner indenter. Experimental results showed that increasing the loading rate from 2 to 20 mN/s, the size of serrated flow was greatly weakened, but the number of serrated flow kept very stable, together with very similar shear band features around the residual indents. These results challenge the current understanding derived from the results obtained by using the Berkovich indenter, and can be well explained by the shear-band propagation dynamics model, i.e., loading rate impeded the propagation of shear band rather than its nucleation.

KW - Bulk metallic glass

KW - Nanoindentation

KW - Serrated flow

KW - Shear band

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New evidences for understanding the serrated flow and shear band behavior in nanoindentation of metallic glasses

Abstract

Keywords

ASJC Scopus subject areas

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