On the numerical simulation of the microstructural evolution induced by laser additive manufacturing of steel products

Abstract

Laser powder bed fusion additive manufacturing of metals; physics, computational, and materials challenges Applied Physics Reviews 2, 041304 (2015) Abstract. A numerical model is developed to simulate the microstructural evolution during a laser additive manufacturing process. The model is based on original algorithms designed with the use of a modified cellular automata method proposed by Rappaz and Gandin to describe the formation of grain structure during solidification, together with the classical numerical finite difference solution of a heat transfer equation. A double ellipsoid heat source model is employed to calculate the heat input during laser additive manufacturing. The model is validated using experimental data.

Assessment of Additive Manufactured IN 625’s Tensile Strength Based on Nonstandard Specimens

“…Multiple studies were conducted on metallic materials manufactured by AM, most of them being realized on titanium-based alloys [16][17][18], nickel-based superalloys [19][20][21][22][23][24], cobaltchromium alloys [25][26][27], and aluminium alloys [28][29][30]. However, current studies validate new materials for AM [31], and the computational methods and programs used for conventionally manufactured alloys are tailored for AM [32][33][34][35][36][37][38][39]. Many standards are applied during the material selection and testing campaigns to produce new parts.…”