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- W2460997825 abstract "Abstract A 3D thermal-mechanical-metallurgical finite element (FE) model has been developed to investigate the microstructure and the distribution of residual stress of a muck-up represents a dissimilar metal weld (DMW) joint of a VVER 440 reactor pressure vessel safety-end nozzle. In order to capture the correct microstructure evolution a number of material properties were required for present simulations. The first task of mechanical characterization was the determination, with accurate experimental devices and its numerical interpretation, of the mechanical properties in terms of stress-strain curve of all DMW constitutive materials: austenitic stainless steel, ferrite steel, heat affected ferrite steel zone and buttering layers properties. For characterization and validation purpose microstructure and hardness map were also evaluated. To get addition information for further investigation, fracture properties for base materials, heat affected ferrite steel zone and buttering layers were also measured. The welding was simulated by the 3D finite element model using temperature and phase dependent material properties. The commercial finite element code was used to obtain the numerical results by implementing the Goldak’s double ellipsoidal shaped weld heat source and combined convection radiation boundary conditions. The results of the simulation provide the size of the HAZ and the volume of the molten zone. The volume fraction of bainite and martensite can be quantified and serves as an additional response that can be used to validate this model with experiments and to predict phase volume fractions under new processing conditions. This paper also presents the results of the through-thickness residual stress distributions on the certain DMW. The results of FE analyses were compared with the experimental measurements in the ferritic steel section of the weld." @default.
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- W2460997825 date "2016-01-01" @default.
- W2460997825 modified "2023-09-29" @default.
- W2460997825 title "Material Characterization and Numerical Simulation of a Dissimilar Metal Weld" @default.
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- W2460997825 doi "https://doi.org/10.1016/j.prostr.2016.06.131" @default.
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