Thermal and Stress Modeling of Laser Fabrication of Multiple Material Components
Solid freeform fabrication (SFF) is an automated manufacturing process that builds threedimensional complex-shaped structures layer-by-layer directly from CAD data without partspecific tooling and human intervention. In many cases multiple materials are involved in fabricating one component using SFF approaches. Porcelain-fused-to-metal (PFM) restoration for permanent fixed prosthodontics is an example of this kind. In this study 3-dimensional finite element modeling has been carried out to investigate the temperature and stress field in processing of multiple material components using a moving laser beam. Effects of fabrication sequences, laser scanning patterns and scanning rates on residual stresses have been investigated. Implications of these results on laser fabrication of multiple materials have been discussed.