About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
A-13: Achieving Single Crystals of Pure Ni via Laser Powder Bed Fusion with a Flat-top Laser Profile |
Author(s) |
Dennis Edgard Jodi, Tomonori Kitashima, Yuichiro Koizumi, Takayoshi Nakano, Makoto Watanabe |
On-Site Speaker (Planned) |
Dennis Edgard Jodi |
Abstract Scope |
The microstructure control in laser powder bed fusion (LPBF) using a flat-top laser profile to achieve a single crystal pure Ni structure was investigated. Using the flat-top profile, a parametric optimization yielded a planar melt pool. There was no usage of powder stage heating or SX seed. Based on the optimized parameters, at the high building heights, a suppression of high-angle grain boundary (HAGB, misorientation > 15°) was obtained, yielding the formation of an SX structure with a homogeneous configuration of near-{001}<100> parallel to the build direction. The SX structure was supplemented by a lower strain accumulation, which was beneficial in preventing HAGB formation from the continuous dynamic recrystallization process. This study showed that it is feasible to use a flat-top profile in the LPBF process to achieve an SX structure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Solidification |