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Influence of stress field of expanding and contracting plate shaped precipitate on hydride embrittlement of Zr-alloys

Singh, R. N.; Khandelwal, H. K.; Bind, A. K.; Sunil, S. and Ståhle, Per LU (2013) In Materials Science & Engineering: A 579. p.157-163
Abstract
The stress fields of expanding (precipitation) and contracting (dissolution) hydride plates were computed by finite element method using Zr-H solid solution and hydride properties at 25, 200 and 400 degrees C for fully and semi-constrained hydride plates. For the first time simultaneous hydride expansion and matrix contraction and vice-versa have been considered in a simulation of hydride precipitation and dissolution, respectively. It was observed that a fully constrained expanding hydride plate exerts a tensile stress field in the matrix close to the edge of the hydride plate while a partially contracting hydride plate exerts a tensile stress field in the hydride plate as well as a large compressive stress in the surrounding matrix close... (More)
The stress fields of expanding (precipitation) and contracting (dissolution) hydride plates were computed by finite element method using Zr-H solid solution and hydride properties at 25, 200 and 400 degrees C for fully and semi-constrained hydride plates. For the first time simultaneous hydride expansion and matrix contraction and vice-versa have been considered in a simulation of hydride precipitation and dissolution, respectively. It was observed that a fully constrained expanding hydride plate exerts a tensile stress field in the matrix close to the edge of the hydride plate while a partially contracting hydride plate exerts a tensile stress field in the hydride plate as well as a large compressive stress in the surrounding matrix close to the edge of the hydride plate. It is suggested that a compressive stress component in the matrix acting normal to a partially shrinking hydride plate could possibly explain an enhanced resistance to hydride embrittlement of Zr-alloy at elevated temperature. (C) 2013 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Zr-alloy, Hydride embrittlement, Fracture toughness, Stress-field, Fully, constrained
in
Materials Science & Engineering: A
volume
579
pages
157 - 163
publisher
Elsevier
external identifiers
  • wos:000321681900021
  • scopus:84878726590
ISSN
1873-4936
DOI
10.1016/j.msea.2013.04.117
language
English
LU publication?
yes
id
a9ac0d4b-4dec-4a6d-abfc-de5476d6eeab (old id 3975413)
date added to LUP
2013-08-21 17:28:28
date last changed
2019-03-12 01:02:19
@article{a9ac0d4b-4dec-4a6d-abfc-de5476d6eeab,
  abstract     = {The stress fields of expanding (precipitation) and contracting (dissolution) hydride plates were computed by finite element method using Zr-H solid solution and hydride properties at 25, 200 and 400 degrees C for fully and semi-constrained hydride plates. For the first time simultaneous hydride expansion and matrix contraction and vice-versa have been considered in a simulation of hydride precipitation and dissolution, respectively. It was observed that a fully constrained expanding hydride plate exerts a tensile stress field in the matrix close to the edge of the hydride plate while a partially contracting hydride plate exerts a tensile stress field in the hydride plate as well as a large compressive stress in the surrounding matrix close to the edge of the hydride plate. It is suggested that a compressive stress component in the matrix acting normal to a partially shrinking hydride plate could possibly explain an enhanced resistance to hydride embrittlement of Zr-alloy at elevated temperature. (C) 2013 Elsevier B.V. All rights reserved.},
  author       = {Singh, R. N. and Khandelwal, H. K. and Bind, A. K. and Sunil, S. and Ståhle, Per},
  issn         = {1873-4936},
  keyword      = {Zr-alloy,Hydride embrittlement,Fracture toughness,Stress-field,Fully,constrained},
  language     = {eng},
  pages        = {157--163},
  publisher    = {Elsevier},
  series       = {Materials Science & Engineering: A},
  title        = {Influence of stress field of expanding and contracting plate shaped precipitate on hydride embrittlement of Zr-alloys},
  url          = {http://dx.doi.org/10.1016/j.msea.2013.04.117},
  volume       = {579},
  year         = {2013},
}