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Evidence of stress-induced hydrogen ordering in zirconium hydrides

Steuwer, Axel LU ; Santisteban, J. R.; Preuss, M.; Peel, M. J.; Buslaps, T. and Harada, M. (2009) In Acta Materialia 51(1). p.145-152
Abstract
The formation of hydrides in zirconium alloys significantly affects their mechanical properties and is considered to play a critical role in their failure mechanisms, yet relatively little is known about the micromechanical behavior of hydrides in the bulk. This paper presents the result of in situ uniaxial mechanical tensioning experiments on hydrided zircaloy-2 and zircaloy-4 specimens using energy-dispersive synchrotron X-ray diffraction, which suggests that a stress-induced transformation of the delta-hydride to gamma-hydride via ordering of the hydrogen atoms occurs, akin to a Snoek-type relaxation. Subsequent annealing was found to reverse the ordering phenomenon. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights... (More)
The formation of hydrides in zirconium alloys significantly affects their mechanical properties and is considered to play a critical role in their failure mechanisms, yet relatively little is known about the micromechanical behavior of hydrides in the bulk. This paper presents the result of in situ uniaxial mechanical tensioning experiments on hydrided zircaloy-2 and zircaloy-4 specimens using energy-dispersive synchrotron X-ray diffraction, which suggests that a stress-induced transformation of the delta-hydride to gamma-hydride via ordering of the hydrogen atoms occurs, akin to a Snoek-type relaxation. Subsequent annealing was found to reverse the ordering phenomenon. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydrides, X-ray diffraction, Zircaloy, Short-range ordering
in
Acta Materialia
volume
51
issue
1
pages
145 - 152
publisher
Elsevier
external identifiers
  • wos:000263695300016
  • scopus:55749106568
ISSN
1873-2453
DOI
10.1016/j.actamat.2008.08.061
language
English
LU publication?
yes
id
6f4cc3f5-a012-468e-b64d-0de5821477b0 (old id 1372013)
date added to LUP
2009-05-08 13:59:43
date last changed
2017-10-08 03:33:14
@article{6f4cc3f5-a012-468e-b64d-0de5821477b0,
  abstract     = {The formation of hydrides in zirconium alloys significantly affects their mechanical properties and is considered to play a critical role in their failure mechanisms, yet relatively little is known about the micromechanical behavior of hydrides in the bulk. This paper presents the result of in situ uniaxial mechanical tensioning experiments on hydrided zircaloy-2 and zircaloy-4 specimens using energy-dispersive synchrotron X-ray diffraction, which suggests that a stress-induced transformation of the delta-hydride to gamma-hydride via ordering of the hydrogen atoms occurs, akin to a Snoek-type relaxation. Subsequent annealing was found to reverse the ordering phenomenon. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
  author       = {Steuwer, Axel and Santisteban, J. R. and Preuss, M. and Peel, M. J. and Buslaps, T. and Harada, M.},
  issn         = {1873-2453},
  keyword      = {Hydrides,X-ray diffraction,Zircaloy,Short-range ordering},
  language     = {eng},
  number       = {1},
  pages        = {145--152},
  publisher    = {Elsevier},
  series       = {Acta Materialia},
  title        = {Evidence of stress-induced hydrogen ordering in zirconium hydrides},
  url          = {http://dx.doi.org/10.1016/j.actamat.2008.08.061},
  volume       = {51},
  year         = {2009},
}