A Review on Effect of Process Parameters on the Density, Hardness and Porosity of The Part Fabricated by Powder Bed Fusion Techniques in Additive Manufacturing

Abstract

Direct metal laser sintering is an additive manufacturing method which allows manufacturing of complex parts without using dies in short time. In this paper different methods and experiments conducted in the domain are reviewed and presented. A comprehensive review has been done and this paper presents the experiments and their results. DMLS and SLS has attracted more attention as compared to the other methods available in the additive manufacturing. DMLS and SLS method uses the LASER power source for the melting the metal and manufacturing the part. These methods are categorized under powder bed fusion methods which either by melting or by sintering the powder manufactures the component. Different metals are experimented and it was observed from the results that electric current, scan speed, laser frequency are some parameters which are affecting the density and layer thickness of the material.