|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Powder Materials Processing and Fundamental Understanding
||Rapid Solidification Behavior of Cast Ni-based Superalloy IN-100 by EBM Process
||Yusaku Hasebe, Takehito Hagisawa, Satoru Ohsaki, Kazuya Kubo, Cheng Yang, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba
|On-Site Speaker (Planned)
Rapid solidification behavior of cast Ni-based superalloy IN-100 was investigated by using electron beam melting (EBM) process. Arcam A2X was used for the single bead experiments, and 30 single scans of electron beam with various beam power and speeds were scanned on the plate pre-heated to 1323K under 2×10-3 mbar of He atmosphere after evacuation. Melt pool depth and width were increased with increasing current and decreasing scan speed. Electron backscatter diffraction (EBSD) analysis revealed that epitaxial growth with the crystal orientation of the underlying substrates was observed when the melt pool is shallow. With increasing the melt pool depth, columnar grain nucleation got dominated with regardless crystal orientation of substrate. Computational fluid dynamics (CFD) simulation was performed considering the experimental results, then evaluated columnar-equiaxed transition of the alloy based on the theory of dendritic growth.
||Additive Manufacturing, Solidification, Copper / Nickel / Cobalt