NUMERICAL MODELING THE EFFECTS OF ADDITIVE MANUFACTURING PARAMETERS, HEAT TREATMENT AND ORIENTATION ON RESIDUAL STRESS AND DISTORTION OF METAL POWDER IN718 PUMP IMPELLER FABRICATION
Selective laser melting (SLM) technology based on IN718 powder bed by means of finite element method (FEM) has been concerned with effects of additive manufacturing (AM) parameters, heat treatment and part orientation on residual stress and distortion of IN718 pump impeller. It is found that fabrication in horizontal position has the least and vertical position has the most residual stress and distortion between considered conditions. Also, increasing the speed of the process is very efficient and reduce the residual stress and distortion of the process up to 65% and heat treatment is beneficial in reducing the distortion in most of the conditions.
Selective Laser Melting, IN718, Pump Impeller, Finite Element Method.