About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
Alloy Design/Modification, Powder Feedstock Atomization and Process Optimization Modeling for Additive Manufacturing by Laser Powder Bed Fusion |
Author(s) |
Yongho Sohn, Jeongmin Woo, Abhishek Mehta, Kevin Graydon, Thinh Huynh, Nathalia Diaz, Asif Mahmud |
On-Site Speaker (Planned) |
Yongho Sohn |
Abstract Scope |
Laser powder bed fusion (LPBF) of metallic alloys is a transformative additive manufacturing technology for production of engineering components with nearly unlimited geometrical complexity and customization. This technology also brings an opportunity to develop new and modified alloys that take advantage of thermo-kinetic environment of LPBF, which warrants fundamental understanding of phase transformations and microstructural development. CALPHAD-based strategies in alloy design/modification coupled with experimental facility that includes gas atomization, laser powder bed fusion and a suite of microstructural and mechanical characterization are introduced, followed by selected results from Mg- Al-, Ti-, Fe-, Ni-, and multi-principal element alloys. Detailed observations on keyhole porosity, lack-of-fusion flaws, solidification microstructure and cracking are documented with respect to the alloy composition, solidification paths, and LPBF parameters. Computation investigations using generic algorithm and machine learning to establish process optimization for a wide range of metallic alloys based on their thermophysical properties are presented and discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Solidification, Other |