Crystal plasticity modeling of additively manufactured metallic microstructures

Abstract

Different manufacturing processes such as flow forming, rolling, wire drawing and additive manufacturing induce anisotropic structure and texture evolution at the micro scale, which results in macroscopic anisotropic plastic behavior. Among these crostructures, development of columnar grain structure is quite common especially in additively manufactured metallic mate A systematic micromechanical analysis is necessary to evaluate the influence of both grain morphology and texture (orient alignment) on the mechanical response of the metallic alloys produced through such innovative techniques. In this context objective of the present study is to investigate qualitatively the influence of the columnar grain morphology and the orient alignment observed in additively manufactured alloys through crystal plasticity finite element (CPFEM) simulations in repres tive volume elements (RVEs). Different RVEs are generated through Voronoi tessellation and subjected to uniaxial tensile loa in different directions. A detailed analysis is conducted to evaluate the influence of grain structure and orientation alignment o plastic behavior of the material through homogenization for different microstructures.