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Effect of amorphization-mediated plasticity on the hydrogen-void interaction in ideal lattices under hydrostatic tension

Abstract

A thermodynamic model is derived to study the void nucleation in ideal lattices under hydrostatic tension loading and predicts that the plasticity has to be initiated before homogeneous nucleation of voids. Molecular dynamics simulations are performed to evaluate the mechanical behavior of Ni specimens with and without hydrogen charged. The results show that in both cases dislocations are generated before the nucleation of voids, and the insertion of hydrogen atoms does not alter the void nucleation significantly. The fact that the mechanical property is not sensitive on hydrogen is attributed to the formation of an amorphous shell around the voids.
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Category

Academic article

Language

English

Author(s)

  • Kai Zhao
  • Jianying He
  • Inga Gudem Ringdalen
  • Zhiliang Zhang

Affiliation

  • SINTEF Industry / Materials and Nanotechnology
  • Norwegian University of Science and Technology

Year

2018

Published in

Journal of Applied Physics

ISSN

0021-8979

Volume

123

Issue

24

View this publication at Norwegian Research Information Repository