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Post-weld heat treatment stress relaxation in Zircaloy 4 plasma welds

Santisteban, J. R.; Fernandez, L.; Corsco, H.; Martinez, R. L.; Boccanera, L.; Edwards, L.; James, J. A. and Turski, M. (2006). Post-weld heat treatment stress relaxation in Zircaloy 4 plasma welds. Materials Science Forum, 524-525 pp. 491–496.

URL: http://www.scientific.net
DOI (Digital Object Identifier) Link: https://doi.org/10.4028/www.scientific.net/MSF.524-525.491
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Abstract

We have studied the effect of a post-weld heat treatment on plasma arc welds on Zircaloy 4 plates. The samples consist of two 100 mm long, 50 mm wide, and 6.25 mm thick plates, welded along the rolling (longitudinal) direction. The heat-treatment consisted of a steady increase in temperature from room temperature to 450 degrees C over a period of 4.5 hours; followed by cooling with an equivalent cooling rate. Residual strains and stresses along the longitudinal, transverse and normal directions on an as-welded and a heat-treated specimen were measured by neutron diffraction on the ENGIN-X beamline at the Isis Facility, Rutherford Laboratory, UK. Peak tensile stresses of (105 +/- 25) MPa were found in the as-welded specimen, which were reduced to (70 20) MPa after the heat-treatment. Thermal compressive stresses of (-80 +/- 20) MPa were found along the normal direction, which were not affected by the heat treatment. The use of a full-pattern Rietveld refinement for the determination of bulk strains in Zircaloy specimens is also discussed.

Item Type: Journal Item
ISSN: 0255-5476
Extra Information: Conference; 7th European Conference on residual stresses (ERCS 7) 13-15 Sep 2006; Reimers W, Quander S (eds);
Keywords: Zircaloy 4; Plasma welds; Residual stresses; Neutron diffraction;
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 16085
Depositing User: Users 8955 not found.
Date Deposited: 14 May 2009 13:56
Last Modified: 08 May 2019 13:35
URI: http://oro.open.ac.uk/id/eprint/16085
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