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

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

Category
Journal publication
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.
Client
  • Notur/NorStore / NN9391K
  • Notur/NorStore / NN9110K
  • Norges forskningsråd / 234130
Language
English
Author(s)
Affiliation
  • Norwegian University of Science and Technology
  • SINTEF Industry / Materials and Nanotechnology
Year
2018
Published in
Journal of Applied Physics
ISSN
0021-8979
Publisher
American Institute of Physics (AIP)
Volume
123
Issue
24