Calculation of the heat afected zone based inherent strain in 3D metal printing = Tính toán biến dạng dư từ vùng ảnh hưởng nhiệt khi in 3D kim loại

Abstract

Heat affected zone (HAZ) depends on the printing process parameters and material properties. Calculation of the HAZ enables to determize the inherent strain (IS) caused by the fast change of material phases from solid - liquid - solid during 3D printing. IS based deformation of the printed part after removing from the base plate by using electrical discharge machining (EDM) is determined. This paper presents method to calculate the HAZ in different plans according to the printing process parameters for printing 316L stainless steel with SLM printing method. From that, calculation of the IS values in X, y, z directions. Then, we propose the equation for calculating the IS value for whole part.