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Numerical analysis of the effect of processing parameters on the microstructure of stainless steel 316L manufactured by laser-based powder bed fusion

Abstract:

Additive manufacturing is a highly projected technology that continues to evolve and improve. In this context, laser-based powder bed fusion (L-PBF) offers a series of advantages for manufacturing parts of high geometric complexity, impossible or too costly to process through conventional processes. However, anticipating the effect of processing parameters on the resulting microstructure remains challenging due to the complexity of the involved processes. In this sense, numerical simulation, also substantially improved in the recent decade, in particular finite element analysis, offers considerable precision, comparable to results obtained by experimentation. Therefore, in this work, the applicability of numerical simulation is evaluated to predict the effect of laser power, scanning speed, and hatch spacing on the dimensions of the molten pool, degree of porosity, and the resulting microstructure. Ansys Additive …