APPLICATIONS OF POWDER SINTERING TO SELECTIVE LASER SINTERING

摘要

Selective Laser Sintering (SLS) is a Solid Freeform Fabrication process in which a part is built quickly from powders without the use of part-specific tooling. Production of metallic, ceramic and composite parts often requires some form of pre-processing or post-process sintering to achieve full density. Powder Densification Maps represent a potent tool for optimizing the pre-and post-processing parameters. Such maps are computational representations of part density as affected by time, temperature, pressure and materials properties. Critical to the formulation of densification maps is an understanding of time-dependent plasticity. This presentation will summarize SLS developments at The University of Texas at Austin with emphasis on the utility of powder densification mapping of powder pre-processing and part post-processing.