On the Linking Performance Evaluation Toolset to Process-Structure-Properties Mapping of Selective Laser Melting 316L Stainless Steel Using Micromechanical Approach with a Length-Scale Dependent Crystal Plasticity

摘要

Under rapid solidification, the cellular microstructure of additively manufactured 316L stainless steel has a highly relevant contribution to its strength and deformation behavior. Two major factors can be identified at micro-scale, the size scale dependencies of the cellular microstructure and solute segregation process within the forming microstructure. To establish a view on the formation of the microstructure, first a macroscopic model is used to analyze thermal gradients and cooling rates. Then a phase field model utilizes this data to form cellular structure and account for solute trapping effects with continuous growth model kinetics. Length-scale dependent crystal plasticity model is then used to analyze the deformation behavior of the formed cellular microstructures.