|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Applications of Solidification Fundamentals
||Optimizing and Validating the Cellular Automata Finite Element Model for Additive Manufacturing
||Kirubel Teferra, David J Rowenhorst
|On-Site Speaker (Planned)
The present work details an implementation of the Cellular Automata Finite Element (CAFE) model that introduces key steps to improve its computational efficiency in order to simulate the additive manufacturing (AM) solidification process for large polycrystalline domain sizes. The CAFE model, which representing growing dendrites by their envelope geometry, is suitable for AM, where rapid solidification leads to a cellular and nearly planar solidification front. However, the highly localized and translating melt pool renders the CAFE model highly computationally inefficient, since only a small part of the simulation domain is active for any given time step. Key algorithmic improvements are made, and its parallel scalability is demonstrated. This enables simulating large 3D domains such that pole figure plots achieve convergence. Validation studies performed show an excellent comparison of grain morphology and texture to experimental characterization data for two different laser scan patterns for laser powder bed fusion 316L stainless steel.
||Additive Manufacturing, ICME, Solidification