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Persistent URL http://purl.org/net/epubs/work/37170
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Record Id 37170
Title Post-weld heat treatment stress relaxation in Zircaloy 4 plasma welds
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.
Organisation CCLRC , ISIS , ISIS-ENGIN-X
Keywords neutron diffraction , Zircaloy 4 , plasma welds , residual stresses , ISIS 2006
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Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article RESIDUAL STRESSES VII MATERIALS SCIENCE FORUM 524-525 (2006): 491-496. doi:10.4028/0-87849-414-6.491 2006