3D printing of biocompatible PM-materials

The fabrication of complex-shaped parts out of Co-Cr-Mo alloy and 316L stainless steel by three-dimensional printing (3DP) is studied using two grades of each alloy with average particle size of 20 and 75 micrometer, respectively. To produce sound specimens, the proper 3DP processing parameters were determined. The sintering behavior of the powders is characterized by dilatometric analysis and by batch sintering in argon atmosphere at 1280 deg C for 2h. The 3DP process has successfully produced complex-shaped biomedical parts with total porosity of 12 - 25 % and homogenous pore structure, which is suitable for tissue growth into the pores.