This paper provides the numerical simulations of two welding benchmark cases defined in the frame of the European Network on Neutron Techniques Standardization for Structural Integrity. The network involves over 35 organizations from industry and promotes the application of modern experimental and numerical techniques to problems related to the determination of residual stress and distortion in components. The first case issued by Task Group 1, addresses the estimation of residual stress fields around a single weld bead deposited on an austenitic stainless steel plate. The second case issued by Task Group 4, deals with the estimation of residual stress fields in a three-pass slot weld in an austenitic stainless steel plate. In both cases, the welding processes and types of material are same: tungsten-inert-gas welding and AISI 316 stainless steel. It is therefore of interest to compare these two studies in terms of differences between calculated / measured and in terms of the influences of the number of welding pass and heat input.

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