Abstract

Manufacturing sectors are shifting their interest toward additive manufacturing technologies, where components are fabricated directly from CAD models layer by layer. Laser engineered net shaping most known to produce a near net shape of functionally graded materials. In this paper, process parameters that affect mechanical properties, surface topology and physical properties are reviewed. Powder feed rate, hatch distance and layer thickness more related to porosity of the parts that being produced. Mechanical properties get affected by laser power scan speed. Density and hardness sensitive to focal distance of the optimal convergence of the maximal laser intensity and the localized spatial concentration of the powder beam. To get homogeneous microstructure shorter focal distance is preferable. However, working distance has no such impact on density.