|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications III
||Simulation of Part Printability in Electron Beam Melting Additive Manufacturing
||Yousub Lee, Patxi Fernandez-Zelaia, Srdjan Simunovic, Mike Kirka
|On-Site Speaker (Planned)
Electron beam melting is an additive manufacturing process used to print metallic components with complex geometries for aerospace applications. A preheating characteristic enables this technology to avoid large accumulation of residual stress during printing. However, cracking mechanisms particularly in Ni-based superalloys are associated with not only residual stress but also with microstructure (i.e., solidification morphology, transient evolution of Ƴ’). In this study, we investigate the effect of scan strategies on 1) thermal history and microstructure (e.g., Ƴ and Ƴ’), 2) stress development, and 3) cracking susceptibility of Ni-based superalloys during printing. The transient evolution of Ƴ’ is predicted based on thermal cycle and thermodynamic phase diagram in finite element method. Also, thermo-mechanical simulation is utilized to track transient stress evolution.
||Additive Manufacturing, High-Temperature Materials, Modeling and Simulation