Observed of Change in the Hardness of Ni-Cr alloy used to Dental Selective Laser Melting System

摘要

This study reviewed hardness change according to penetration depth in the laser fusing zone as an Nd:YAG laser was irradiated to an Ni-Cr alloy. As a result, this study found the following conclusions. High hardness was achieved because the microstructure of the base metal was modified due to the laser heat source. It was verified that the fusing zone had the characteristics of amorphous alloys, which have better properties than crystalline metal due to the self-quenching caused by laser irradiation.