SLM (selective laser melting) is one of many processes belonging to the additive manufacturing sector, where a laser beam completely melts the particles of the manufactured part layer by layer. In contrast to common models, this framework is based on the minimisation of the free energy density where the phase transformation from powder to molten pool to re‐solidified material is modelled explicitly. The goal is to develop a more sophisticated model which is based on the material behaviour itself rather than on the use of temperature dependent material parameters. The following model is adapted from phase transformations in shape memory alloys, cf. [1]. With this at hand, more insight into the process is gained and the deformation as well as the residual stresses are predictable.
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