Malmö University, Sweden
Residual stresses in additive manufactured components are a known phenomenon. It increases the risks of crack formation, limiting the in-service performance and distorting printed parts. A deeper understanding of how process parameters affect residual stresses is crucial for a better design. To investigate the impact of process parameters, we have measured the residual stress field in laser powder bed fusion additive manufactured components utilizing high-energy synchrotron X-ray diffraction experimental data. The experimental findings are compared with thermo-mechanically modelled finite element results. The elasto- plastic behavior of the material is described by a mechanism-based material model that accounts for microstructural and relaxation effects. The results from the model and measurements give the same trend in the residual stress field, showing that it is possible to model the residual stress field.
Abstract
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