Effect of hydrogen on grain boundary migration in tungsten

Yi Yu; Xiao Lin Shu; Yi Nan Liu; Liang Liang Niu; Shuo Jin; Fei Gao; Guang Hong Lu

doi:10.1007/s11433-015-5662-y

Effect of hydrogen on grain boundary migration in tungsten

Yi Yu
, Xiao Lin Shu
, Yi Nan Liu
, Liang Liang Niu
, Shuo Jin
, Fei Gao
, Guang Hong Lu^*

^*Corresponding author for this work

School of Physics

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

15 Scopus citations

Abstract

Motivated by a grain boundary (GB) healing mechanism that GB turns into a mobile sink through migration to eliminate the vacancies in a bulk, we have further investigated the influence of the retained hydrogen (H) on the GB migration in tungsten using a molecular dynamics simulation. We show that H hinders the GB migration at different H concentrations and temperatures, and such friction of GB migration due to the presence of H increases with the H concentration and decreases with temperature. We demonstrate that H follows the GB-migration as the temperature is higher than 300 K. Most importantly, the presence of H induces a disordering of GB, which affects the GB migration significantly.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Science China: Physics, Mechanics and Astronomy
Volume	58
Issue number	7
DOIs	https://doi.org/10.1007/s11433-015-5662-y
State	Published - 13 Jul 2015

Keywords

disordering
hydrogen
migration
molecular dynamics
tungsten grain boundary

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title = "Effect of hydrogen on grain boundary migration in tungsten",

abstract = "Motivated by a grain boundary (GB) healing mechanism that GB turns into a mobile sink through migration to eliminate the vacancies in a bulk, we have further investigated the influence of the retained hydrogen (H) on the GB migration in tungsten using a molecular dynamics simulation. We show that H hinders the GB migration at different H concentrations and temperatures, and such friction of GB migration due to the presence of H increases with the H concentration and decreases with temperature. We demonstrate that H follows the GB-migration as the temperature is higher than 300 K. Most importantly, the presence of H induces a disordering of GB, which affects the GB migration significantly.",

keywords = "disordering, hydrogen, migration, molecular dynamics, tungsten grain boundary",

author = "Yi Yu and Shu, \{Xiao Lin\} and Liu, \{Yi Nan\} and Niu, \{Liang Liang\} and Shuo Jin and Fei Gao and Lu, \{Guang Hong\}",

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TY - JOUR

T1 - Effect of hydrogen on grain boundary migration in tungsten

AU - Yu, Yi

AU - Shu, Xiao Lin

AU - Liu, Yi Nan

AU - Niu, Liang Liang

AU - Jin, Shuo

AU - Gao, Fei

AU - Lu, Guang Hong

PY - 2015/7/13

Y1 - 2015/7/13

N2 - Motivated by a grain boundary (GB) healing mechanism that GB turns into a mobile sink through migration to eliminate the vacancies in a bulk, we have further investigated the influence of the retained hydrogen (H) on the GB migration in tungsten using a molecular dynamics simulation. We show that H hinders the GB migration at different H concentrations and temperatures, and such friction of GB migration due to the presence of H increases with the H concentration and decreases with temperature. We demonstrate that H follows the GB-migration as the temperature is higher than 300 K. Most importantly, the presence of H induces a disordering of GB, which affects the GB migration significantly.

AB - Motivated by a grain boundary (GB) healing mechanism that GB turns into a mobile sink through migration to eliminate the vacancies in a bulk, we have further investigated the influence of the retained hydrogen (H) on the GB migration in tungsten using a molecular dynamics simulation. We show that H hinders the GB migration at different H concentrations and temperatures, and such friction of GB migration due to the presence of H increases with the H concentration and decreases with temperature. We demonstrate that H follows the GB-migration as the temperature is higher than 300 K. Most importantly, the presence of H induces a disordering of GB, which affects the GB migration significantly.

KW - disordering

KW - hydrogen

KW - migration

KW - molecular dynamics

KW - tungsten grain boundary

UR - https://www.scopus.com/pages/publications/84930867821

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DO - 10.1007/s11433-015-5662-y

M3 - 文章

AN - SCOPUS:84930867821

SN - 1674-7348

VL - 58

SP - 1

EP - 9

JO - Science China: Physics, Mechanics and Astronomy

JF - Science China: Physics, Mechanics and Astronomy

IS - 7

ER -

Effect of hydrogen on grain boundary migration in tungsten

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