Effect of Process Parameters on Distortions Based on the Quantitative Model in the SLM Process

The selective laser melting (SLM) process provides a more extensive design space and manufacturability. However, it is still hindered by its inaccuracy in dimension functionality. distortion the SLM affects dimensional accuracy of component may even hinder process. Still, mechanism has not been well explained; specifically, effects from parameters scan strategies on have sufficiently investigated. In this study, quantitative model that considers displacements, plastic strains, thermal strains each layer developed to analyze mechanism. found be induced residual stress gradient among layers. Then, transient numerical method calculates stress, strain, Different simulations with various layers, scanning speeds, stiffness support structures, are performed study relationship between distortion. It can decreases as height increases. increases speed, reaching maximum at 700 mm/s then dropping. We concluded increasing structures beneficial reduce changing direction layers useless This gives theoretical guidance for reducing distortions