|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Applications of Solidification Fundamentals
||A Phase-field Study of Epitaxial Effect on Solidification Microstructure in Metal Additive Manufacturing
||Jiwon Park, Joo-Hee Kang, Chang-Seok Oh
|On-Site Speaker (Planned)
In this work, the epitaxial effect on the microstructure evolution under rapid solidification condition of additively manufactured AlSi10Mg alloy was investigated with phase-field simulation and electron backscatter diffraction analysis (EBSD). In order to perform the quantitative modeling, phase-field simulations were set from the crystallographic information observed in EBSD and directly compared to the orientation maps. Phase-field simulation successfully demonstrated the microstructural evolution when the appropriate interface anisotropy model is chosen in 3-dimensional simulation. The resulting microstructure was primarily determined by the local thermal gradient and cooling rates. Due to the epitaxial effect from partially melted, previously deposited layer, kinked grain structure across several melt-pool boundaries were observed along the building direction.