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Delayed hydride cracking in Zr-2.5Nb pressure tube material

DSpace at IIT Bombay

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Title Delayed hydride cracking in Zr-2.5Nb pressure tube material
 
Creator SINGH, RN
KUMAR, N
KISHORE, R
ROYCHAUDHURY, S
SINHA, TK
KASHYAP, BP
 
Subject wt pct nb
zirconium alloys
hydrogen
 
Description Delayed hydride cracking (DHC) is one of the localized forms of hydride embrittlement caused by hydrogen migration up the tensile stress gradient. In this work, DHC velocity was measured along the axial direction of the double melted, cold worked and stress-relieved zirconium-2.5niobium pressure tube material in the temperature range of 162-283 degreesC. The DHC crack growth was monitored using the direct current potential drop (DCPD) technique. The calibration curves between the normalized DCPD output and the normalized crack length at different test temperatures were also used to determine the DHC velocity. A simple model capable of explaining the observed features of DHC is proposed. The model explains the basis for the occurrence of incubation period associated with DHC crack initiation. Activation energy associated with the DHC in this alloy was found to be 56 kJ/mol. (C) 2002 .
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-24T16:52:59Z
2011-12-26T12:47:16Z
2011-12-27T05:40:14Z
2011-07-24T16:52:59Z
2011-12-26T12:47:16Z
2011-12-27T05:40:14Z
2002
 
Type Article
 
Identifier JOURNAL OF NUCLEAR MATERIALS, 304(2-3), 189-203
0022-3115
http://dx.doi.org/10.1016/S0022-3115(02)00880-2
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6482
http://hdl.handle.net/10054/6482
 
Language en