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Influence of loading rate and hydrogen content on fracture toughness of Zr-2.5Nb pressure tube material

Bind, A. K.; Singh, R. N.; Khandelwal, H. K.; Sunil, S.; Avinash, G.; Chakravartty, J. K. and Ståhle, Per LU (2015) In Journal of Nuclear Materials 465. p.177-188
Abstract
For the safety assessment of PHWR, it is required to study the flaw tolerance capacity of the pressure tubes as a function of the loading rate. In this work, the effect of loading rate and hydrogen content on the fracture behaviour of a Zr-2.5Nb alloy pressure tube was investigated between 25 and 300 degrees C. For the as received material, the pulling rate only had an effect on fracture toughness at 25 degrees C whereas for. hydrided material the pulling rate affected fracture toughness in the transition regime. For all pulling rates, hydrided materials showed typical S curve behavior with an increase in lower shelf, upper shelf and transition temperature with pulling rate. The number of axial splits on fracture surfaces increased with an... (More)
For the safety assessment of PHWR, it is required to study the flaw tolerance capacity of the pressure tubes as a function of the loading rate. In this work, the effect of loading rate and hydrogen content on the fracture behaviour of a Zr-2.5Nb alloy pressure tube was investigated between 25 and 300 degrees C. For the as received material, the pulling rate only had an effect on fracture toughness at 25 degrees C whereas for. hydrided material the pulling rate affected fracture toughness in the transition regime. For all pulling rates, hydrided materials showed typical S curve behavior with an increase in lower shelf, upper shelf and transition temperature with pulling rate. The number of axial splits on fracture surfaces increased with an increase in the pulling rate and a decrease in temperature and fracture toughness was found to decrease with an increase in the number of axial splits. The reduction in fracture toughness is attributed to a localised deformation between axial splits. (C) 2015 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-2.5Nb alloy, Pressure tubes, Fracture toughness, Hydride, embrittlement, Axial splits, Loading rate
in
Journal of Nuclear Materials
volume
465
pages
177 - 188
publisher
Elsevier
external identifiers
  • wos:000364890300025
  • scopus:84935837068
ISSN
0022-3115
DOI
10.1016/j.jnucmat.2015.05.050
language
English
LU publication?
yes
id
031eb631-3c34-4682-9c69-4fc347139b08 (old id 8539759)
date added to LUP
2016-01-20 11:29:51
date last changed
2017-10-08 03:15:53
@article{031eb631-3c34-4682-9c69-4fc347139b08,
  abstract     = {For the safety assessment of PHWR, it is required to study the flaw tolerance capacity of the pressure tubes as a function of the loading rate. In this work, the effect of loading rate and hydrogen content on the fracture behaviour of a Zr-2.5Nb alloy pressure tube was investigated between 25 and 300 degrees C. For the as received material, the pulling rate only had an effect on fracture toughness at 25 degrees C whereas for. hydrided material the pulling rate affected fracture toughness in the transition regime. For all pulling rates, hydrided materials showed typical S curve behavior with an increase in lower shelf, upper shelf and transition temperature with pulling rate. The number of axial splits on fracture surfaces increased with an increase in the pulling rate and a decrease in temperature and fracture toughness was found to decrease with an increase in the number of axial splits. The reduction in fracture toughness is attributed to a localised deformation between axial splits. (C) 2015 Elsevier B.V. All rights reserved.},
  author       = {Bind, A. K. and Singh, R. N. and Khandelwal, H. K. and Sunil, S. and Avinash, G. and Chakravartty, J. K. and Ståhle, Per},
  issn         = {0022-3115},
  keyword      = {Zr-2.5Nb alloy,Pressure tubes,Fracture toughness,Hydride,embrittlement,Axial splits,Loading rate},
  language     = {eng},
  pages        = {177--188},
  publisher    = {Elsevier},
  series       = {Journal of Nuclear Materials},
  title        = {Influence of loading rate and hydrogen content on fracture toughness of Zr-2.5Nb pressure tube material},
  url          = {http://dx.doi.org/10.1016/j.jnucmat.2015.05.050},
  volume       = {465},
  year         = {2015},
}