Computer-aided site-specifc control of 3D printed metals

Abstract

Conventionally, additive manufacturing (AM) methods such as Direct Energy Deposition (DED) and Laser Powder Bed Fusion (LPBF) has been mainly adopted to produce complex designs. In recent times, site-specific AM properties can be produced by adopting a bidirectional scanning strategy to produce near-perfect single crystals through epitaxial grain growth. In this study, various site-specific dogbone models’ mechanical behaviour is observed using finite element analysis. The effects on von-Mises stress concentrations at various equivalent plastic strain (PEEQ) levels were analysed by experimenting with various geometric designs and texture orientation. Simulation results demonstrated that site-specific AM textures' tensile strength has a strong dependency on the orientation of textures to the applied load.