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• W2897642815 abstract "Despite immense advances in Laser Aided Direct Metal Deposition (DMD) process many issues concerning the adverse effects of process parameters on the stability of variety of properties and the integrity of microstructure have been reported. Comprehensive understanding of the transport phenomena and heat transfer analysis including phase transformations are essential to predict the effects of thermally induced residual stresses and distortions in the deposited materials. A complete model that provides a quantitative relationship between process parameters, cooling rates and desired material properties is highly desirable. This model, which aims at predicting the thermal residual stress history and the type of microstructure in the material, would reduce the time-consuming and cumbersome experimental route to compile sufficient data to predict the material behavior under similar loading conditions. Due to the complexity and nonlinearity of laser aided DMD process, analytical solutions to this process can rarely address the practical manufacturing process. This paper is an attempt towards a methodology of finite element (FE) analysis for the prediction of quenching related macroscopic and microscopic residual stresses in laser aided DMD process. The computer simulation code is based on the metallo-thermo-mechanical theory and FE analysis coupled temperature, phase transformation and stress/strain fields. The significance of including phase transformation effects in the process has been demonstrated by a thorough comparison of residual stresses in the material with and without the phase transformation kinetics. The FE code of this type can prove to be a very useful tool in predicting the material behavior and optimizing the process parameters for laser aided DMD process to obtain the best internal quality and dimensional accuracy.Despite immense advances in Laser Aided Direct Metal Deposition (DMD) process many issues concerning the adverse effects of process parameters on the stability of variety of properties and the integrity of microstructure have been reported. Comprehensive understanding of the transport phenomena and heat transfer analysis including phase transformations are essential to predict the effects of thermally induced residual stresses and distortions in the deposited materials. A complete model that provides a quantitative relationship between process parameters, cooling rates and desired material properties is highly desirable. This model, which aims at predicting the thermal residual stress history and the type of microstructure in the material, would reduce the time-consuming and cumbersome experimental route to compile sufficient data to predict the material behavior under similar loading conditions. Due to the complexity and nonlinearity of laser aided DMD process, analytical solutions to this process can ra..." @default.
• W2897642815 created "2018-10-26" @default.
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• W2897642815 date "2003-01-01" @default.
• W2897642815 modified "2023-09-26" @default.
• W2897642815 title "3-dimensional transient residual stress finite element analysis for laser aided direct metal deposition process" @default.
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• W2897642815 doi "https://doi.org/10.2351/1.5060091" @default.
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