Mechanical Properties of Selective Laser Melted CoCr Alloys: A Review

Cobalt-chromium (CoCr) alloys are widely known for their biomedical applications due to their numerous favorable characteristics. The fabrication process for these alloys is crucial and plays an important role in the mechanical and metallurgical properties. Powder bed fusion (PBF) is a type of additive manufacturing technique, which includes selective laser melting (SLM) process as one of the 3D printing techniques that is used for CoCr fabrication. There are different SLM process parameters that affect the mechanical properties of the built part. The present work is the review of different parameters that affect the component manufactured using SLM. It was found that the laser scanning speed was the most influential factor for the density and hardness of the SLM formed CoCr alloys. It was also found that the mechanical properties of the SLM manufactured CoCr alloys are higher as compared to the cast alloys due to the dense, compact, homogeneous, and finer microstructure formed during the SLM process.