【摘 要】
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A 3-D sequential coupling finite element simulation is performed to investigate thetemperature field and residual stress in the dissimilar metal weld of a PWR safe-end and nozzle.Chemical compositions
【机 构】
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Suzhou Nuclear Power Research Institute, Suzhou 215004, PR China
【出 处】
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The 4th International Symposium on Materials and Reliability
论文部分内容阅读
A 3-D sequential coupling finite element simulation is performed to investigate thetemperature field and residual stress in the dissimilar metal weld of a PWR safe-end and nozzle.Chemical compositions and welding residual stress of the dissimilar metal weld is tested.And residual stress of the welded joint of nozzle and safe-end has been studied, aiming to provide a referencefor the fabrication and operationof safe-end and nozzle.The results show that large hoop (S33) and axial (S22) of welding residual stresses are generated in the weld metal.The maximum tensile and compressive stresses of S22 and S33 are all in the weld metal or at the interface of the nozzle and weld metal.Due to the difference in mechanical properties and chemical compositions between the basemetal and weld metal, a discontinuous stress distribution is generated across the interface between the weld metal and nozzle.
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