Effect of hydrogen charging on pop-in behavior of a zr-based metallic glass

Lin Tian; Dominik Tönnies; Moritz Hirsbrunner; Tim Sievert; Zhiwei Shan; Cynthia A. Volkert

doi:10.3390/met10010022

Effect of hydrogen charging on pop-in behavior of a zr-based metallic glass

Lin Tian
, Dominik Tönnies
, Moritz Hirsbrunner
, Tim Sievert
, Zhiwei Shan
, Cynthia A. Volkert

School of Materials Science and Engineering

University of Göttingen
Xi'an Jiaotong University

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

12 Scopus citations

Abstract

In this work, structural and mechanical properties of hydrogen-charged metallic glass are studied to evaluate the effect of hydrogen on early plasticity. Hydrogen is introduced into samples of a Zr-based (Vit 105) metallic glass using electrochemical charging. Nanoindentation tests reveal a clear increase in modulus and hardness as well as in the load of the first pop-in with increasing hydrogen content. At the same time, the probability of a pop-in occurring decreases, indicating that hydrogen hinders the onset of plastic instabilities while allowing local homogeneous deformation. The hydrogen-induced stiffening and hardening is rationalized by hydrogen stabilization of shear transformation zones (STZs) in the amorphous structure, while the improved ductility is attributed to the change in the spatial correlation of the STZs.

Original language	English
Article number	22
Journal	Metals
Volume	10
Issue number	1
DOIs	https://doi.org/10.3390/met10010022
State	Published - Jan 2020

Keywords

Hydrogen
Indentation
Metallic glass
Plasticity
Pop-in

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10.3390/met10010022

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title = "Effect of hydrogen charging on pop-in behavior of a zr-based metallic glass",

abstract = "In this work, structural and mechanical properties of hydrogen-charged metallic glass are studied to evaluate the effect of hydrogen on early plasticity. Hydrogen is introduced into samples of a Zr-based (Vit 105) metallic glass using electrochemical charging. Nanoindentation tests reveal a clear increase in modulus and hardness as well as in the load of the first pop-in with increasing hydrogen content. At the same time, the probability of a pop-in occurring decreases, indicating that hydrogen hinders the onset of plastic instabilities while allowing local homogeneous deformation. The hydrogen-induced stiffening and hardening is rationalized by hydrogen stabilization of shear transformation zones (STZs) in the amorphous structure, while the improved ductility is attributed to the change in the spatial correlation of the STZs.",

keywords = "Hydrogen, Indentation, Metallic glass, Plasticity, Pop-in",

author = "Lin Tian and Dominik T{\"o}nnies and Moritz Hirsbrunner and Tim Sievert and Zhiwei Shan and Volkert, \{Cynthia A.\}",

note = "Publisher Copyright: {\textcopyright} 2019 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2020",

month = jan,

doi = "10.3390/met10010022",

language = "英语",

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TY - JOUR

T1 - Effect of hydrogen charging on pop-in behavior of a zr-based metallic glass

AU - Tian, Lin

AU - Tönnies, Dominik

AU - Hirsbrunner, Moritz

AU - Sievert, Tim

AU - Shan, Zhiwei

AU - Volkert, Cynthia A.

PY - 2020/1

Y1 - 2020/1

N2 - In this work, structural and mechanical properties of hydrogen-charged metallic glass are studied to evaluate the effect of hydrogen on early plasticity. Hydrogen is introduced into samples of a Zr-based (Vit 105) metallic glass using electrochemical charging. Nanoindentation tests reveal a clear increase in modulus and hardness as well as in the load of the first pop-in with increasing hydrogen content. At the same time, the probability of a pop-in occurring decreases, indicating that hydrogen hinders the onset of plastic instabilities while allowing local homogeneous deformation. The hydrogen-induced stiffening and hardening is rationalized by hydrogen stabilization of shear transformation zones (STZs) in the amorphous structure, while the improved ductility is attributed to the change in the spatial correlation of the STZs.

AB - In this work, structural and mechanical properties of hydrogen-charged metallic glass are studied to evaluate the effect of hydrogen on early plasticity. Hydrogen is introduced into samples of a Zr-based (Vit 105) metallic glass using electrochemical charging. Nanoindentation tests reveal a clear increase in modulus and hardness as well as in the load of the first pop-in with increasing hydrogen content. At the same time, the probability of a pop-in occurring decreases, indicating that hydrogen hinders the onset of plastic instabilities while allowing local homogeneous deformation. The hydrogen-induced stiffening and hardening is rationalized by hydrogen stabilization of shear transformation zones (STZs) in the amorphous structure, while the improved ductility is attributed to the change in the spatial correlation of the STZs.

KW - Hydrogen

KW - Indentation

KW - Metallic glass

KW - Plasticity

KW - Pop-in

UR - https://www.scopus.com/pages/publications/85077361130

U2 - 10.3390/met10010022

DO - 10.3390/met10010022

M3 - 文章

AN - SCOPUS:85077361130

SN - 2075-4701

VL - 10

JO - Metals

JF - Metals

IS - 1

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ER -

Effect of hydrogen charging on pop-in behavior of a zr-based metallic glass

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Keywords

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