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- W2270469076 abstract "The aim of this work is to describe the formulation adopted for the numerical simulation of the Metal Deposition process (MD). MD process consists of a manufacturing technology similar to the multi-pass welding used for building features such as bosses and flanges on fabricated components. A fully coupled thermo-mechanical solution is considered including phase-change phenomena defined in terms of latent heat release and shrinkage effects. Temperature evolution as well as residual stresses and distortions due to the successive welding layers are accurately studied coupling the heat transfer analysis together with the mechanical field. The material behaviour is characterized by a thermo-elasto-viscoplastic constitutive model (at macro-level) coupled with a metallurgical model (at micro-level). Nickel alloy (INCONEL-718) is the target material of this work. Both heat convection and heat radiation models are introduced to dissipate heat through the boundaries. An in-house developed coupled FE software was the starting point to deal with the simulation and an ad-hoc activation methodology has been implemented to simulate the deposition of the different layers of melted material. Thermo-mechanical results are presented in terms of temperature evolution, residual stresses generated and prediction of the final shape. Difficulties and simplifying hypotheses are discussed." @default.
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- W2270469076 date "2008-09-01" @default.
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- W2270469076 title "A NUMERICAL MODEL FOR THE SIMULATION OF MULTI-PASS WELDING AND METAL DEPOSITION PROCESSES" @default.
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