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

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Proceedings titleMaterials Science & Technology Conference and Exhibition 2013 (MS&T'13)
ConferenceMaterials Science and Technology Conference and Exhibition 2013, October 27-31 2013, Montreal, QC, Canada
SubjectNeutron diffraction; Phase composition; Zr-2.5Nb pressure tube
AbstractZr-2.5Nb alloy is used for the pressure tubes in CANDU® 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 α-phase and approximately 8% β-phase material. In the last step of production, the pressure tube is given a steam-autoclave treatment (i.e., thermal ageing at 400°C for 24 h). This treatment results in decomposing the β-phase into an Nb-enriched β-phase and a metastable ω-phase material. In this present experiment, as received pressure tube materials were modified by high-temperature annealing and thermal ageing 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.
Publication date
PublisherMaterials Science and Technology
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number23000574
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Record identifierc9db53a7-696c-4b04-b0f6-ec1b9bb7853c
Record created2016-08-03
Record modified2016-08-03
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