Neutron diffraction investigation of phase compositions in as received and modified Zr-2·5Nb pressure tube materials

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DOIResolve DOI: http://doi.org/10.1179/1879139514Y.0000000160
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TypeArticle
Journal titleCanadian Metallurgical Quarterly
ISSN0008-4433
Volume54
Issue1
Pages2429; # of pages: 6
SubjectDiffractometers; Neutron diffraction; Neutrons; Nuclear fuels; Phase composition; Thermal aging; Tubes (components); Zirconium; Atomic energy of canada limiteds; High-temperature annealing; Modified materials; Neutron powder diffractometer; Pressure tubes; Room temperature; Steam autoclave treatments; Thermal aging treatments; Pressure tube reactors
AbstractZr-2·5Nb alloy is used for the pressure tubes in CANDU [CANDU® (CANada Deuterium Uranium) is a registered trademark of Atomic Energy of Canada Limited.] reactor fuel channels. Three phases (α, β and ω) of zirconium are known to exist in Zr-2·5Nb alloy pressure tube materials. An as received pressure tube is composed mainly of a phase and approximately 8% b phase material. In the last step of production, the pressure tube is given a steam autoclave treatment (i.e. thermal aging at 400°C for 24 h). This treatment results in decomposing the b phase into an Nb enriched b phase and a metastable v phase material. In the present experiment, as received pressure tube materials were modified by high temperature annealing and thermal aging treatments. This paper presents a neutron diffraction investigation into the phase compositions in the modified materials at room temperature using the C-2 high resolution neutron powder diffractometer at the Canadian Neutron Beam Centre. © 2015 Canadian Institute of Mining, Metallurgy and Petroleum Published by Maney on behalf of the Institute.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Canadian Neutron Beam Centre (CNBC-CCFN)
Peer reviewedYes
NPARC number21275636
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Record identifier9482f28a-abac-4bd3-910a-fc59b128e694
Record created2015-07-14
Record modified2016-05-09
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