|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Multi-scale Modeling of Selective Laser Melting of Inconel 718
||Kubra Karayagiz, Thien Duong, Vahid Attari, Luke Johnson, Brian Franco, Gustavo Tapia, Mohamad Mahmoudi, Alaa Elwany, Ji Ma, Ibrahim Karaman, Raymundo Arroyave
|On-Site Speaker (Planned)
Predicting the microstructure of SLM-fabricated parts is very challenging due to the complex thermal histories that result from rapid heating-cooling cycles upon successive passes of the laser beam. In the present work, we develop a multi-scale modeling framework for simulating the rapid solidification process during SLM of Ni-Nb alloy approximating Inconel 718. First, the thermal history is simulated using a finite element (FE) model, serving as input to the multi-phase-field (PF) model coupled with CALPHAD technique. As opposed to the requirement of the near equilibrium condition in the traditional phase field models, the employed phase field model accounts for highly non-equilibrium conditions, which makes it convenient to use for the SLM process. The developed framework is used to investigate the effect of process parameters on the final microstructure, particularly, the dendritic structure and Nb segregation. The predictions are validated through comparison with experiments.
||Planned: Supplemental Proceedings volume