Threshold stress intensity factor for delayed hydride cracking in Zr-2.5%Nb pressure tube alloy
(2009) In Materials Science & Engineering: A 523(1-2). p.112-117- Abstract
- Delayed hydride cracking (DHC) velocity was determined at 203,227,250 and 283 degrees C using 17 mm width curved compact toughness specimens machined from an unirradiated Zr-2.5 wt.% Nb pressure tube spool, gaseously charged with 60 ppm of hydrogen by weight. Single CT specimen was used to determine DHC velocity at a constant temperature for a range of stress intensity factor (K-1) obtained by load drop method. For a given temperature and K-1 > 15 Mpa m(1/2), DHC velocity was found to be practically independent of K-1. For 15 > K-1 > 10 MPa m(1/2), DHC velocity decreased significantly with decrease in stress intensity factor and extrapolation of the data suggested the threshold stress intensity factor to be about 9-11 MPa m(1/2)... (More)
- Delayed hydride cracking (DHC) velocity was determined at 203,227,250 and 283 degrees C using 17 mm width curved compact toughness specimens machined from an unirradiated Zr-2.5 wt.% Nb pressure tube spool, gaseously charged with 60 ppm of hydrogen by weight. Single CT specimen was used to determine DHC velocity at a constant temperature for a range of stress intensity factor (K-1) obtained by load drop method. For a given temperature and K-1 > 15 Mpa m(1/2), DHC velocity was found to be practically independent of K-1. For 15 > K-1 > 10 MPa m(1/2), DHC velocity decreased significantly with decrease in stress intensity factor and extrapolation of the data suggested the threshold stress intensity factor to be about 9-11 MPa m(1/2) in the aforementioned temperature range. The activation energy associated with DHC was observed to be 35.1 kJ/mol. (C) 2009 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1507275
- author
- Singh, R. N. ; Ståhle, Per LU ; Chakravartty, J. K. and Shmakov, A. A.
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Threshold stress intensity, Zr-2.5Nb alloy, Delayed hydride cracking, factor, Pressure tube
- in
- Materials Science & Engineering: A
- volume
- 523
- issue
- 1-2
- pages
- 112 - 117
- publisher
- Elsevier
- external identifiers
-
- wos:000270632900017
- scopus:68949192832
- ISSN
- 1873-4936
- DOI
- 10.1016/j.msea.2009.05.066
- language
- English
- LU publication?
- yes
- id
- 7f7615ad-d0cb-4ff9-a980-ee1ea78b4ca2 (old id 1507275)
- date added to LUP
- 2016-04-01 12:00:45
- date last changed
- 2022-03-20 22:12:01
@article{7f7615ad-d0cb-4ff9-a980-ee1ea78b4ca2,
abstract = {{Delayed hydride cracking (DHC) velocity was determined at 203,227,250 and 283 degrees C using 17 mm width curved compact toughness specimens machined from an unirradiated Zr-2.5 wt.% Nb pressure tube spool, gaseously charged with 60 ppm of hydrogen by weight. Single CT specimen was used to determine DHC velocity at a constant temperature for a range of stress intensity factor (K-1) obtained by load drop method. For a given temperature and K-1 > 15 Mpa m(1/2), DHC velocity was found to be practically independent of K-1. For 15 > K-1 > 10 MPa m(1/2), DHC velocity decreased significantly with decrease in stress intensity factor and extrapolation of the data suggested the threshold stress intensity factor to be about 9-11 MPa m(1/2) in the aforementioned temperature range. The activation energy associated with DHC was observed to be 35.1 kJ/mol. (C) 2009 Elsevier B.V. All rights reserved.}},
author = {{Singh, R. N. and Ståhle, Per and Chakravartty, J. K. and Shmakov, A. A.}},
issn = {{1873-4936}},
keywords = {{Threshold stress intensity; Zr-2.5Nb alloy; Delayed hydride cracking; factor; Pressure tube}},
language = {{eng}},
number = {{1-2}},
pages = {{112--117}},
publisher = {{Elsevier}},
series = {{Materials Science & Engineering: A}},
title = {{Threshold stress intensity factor for delayed hydride cracking in Zr-2.5%Nb pressure tube alloy}},
url = {{http://dx.doi.org/10.1016/j.msea.2009.05.066}},
doi = {{10.1016/j.msea.2009.05.066}},
volume = {{523}},
year = {{2009}},
}