3D modelling of multipass welding of a 316L stainless steel pipe

3D modelling of a multi pass dissimilar tube welding and post weld heat treatment of nickel based alloy and chromium steel

“…This is evident because the numerical simulation of the residual stresses and distortions needs to accurately take into account the interactions between heat transfer, metallurgical transformations and mechanical fields [2]. 3D finite element model is developed in order to accurately capture the temperature fields and the residual stresses in the dissimilar welded tubes.…”

“…In this case, the microstructure, residual stresses, and distortion are altered with each applied weld pass. Moreover, welding dissimilar tubes introduce additional complexity due to varying temperature dependent material properties of base and weld metal [2]. Therefore, the investigation of these residual stresses is vital for determination of the fatigue lifetime as well as the damage behaviour of such welded tubes.…”

Investigation of indentation-, impact- and scratch-induced mechanically affected zones in a copper single crystal

“…The MAZ corresponds to the zone in which the microstructure was altered by the mechanical treatment. This concept defined in the present paper has been inspired from the well-known Heat Affected Zone (HAZ) induced by welding processes [32] or the Thermo-Mechanically Affected Zone (TMAZ) induced by friction stir welding processes [33]. One important issue is to find a reliable method to characterize the MAZ in such processes.…”

Three-dimensional thermal simulation and experimental investigation of GTAW circumferentially butt-welded Incoloy 800 pipes

“…However, the complexity of welding processes and the complex geometry of real engineering components have made the prediction of defects, welding distortions and residual stresses a very difficult task. FE methods such as coupled/decoupling thermal and mechanical analysis for local and global models of complex structures have been developed to reduce solution time with sufficient accuracy (Chang and Teng, 2004;Michaleris and DeBiccari, 1997 tive meshing technique combined with a data transfer method has been reported for three-dimensional (3D) simulation of multipass welding processes, leading to highly reduce CPU costs (Duranton et al, 2004). In this regard the metallurgical and mechanical consequences of phase transformations have been considered in numerical modelling of welding processes (Leblond et al, 1997;Ronda and Oliver, 2000).…”