|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Hume-Rothery Symposium: Accelerated Measurements and Predictions of Thermodynamics and Kinetics for Materials Design and Discovery
||Printability and Properties of Metallic Alloys for Laser Powder Bed Fusion Additive Manufacturing
||Yongho Sohn, Le Zhou, Holden Hyer, Abhishek Mehta
|On-Site Speaker (Planned)
Laser powder bed fusion (LPBF) of metallic alloys is a transformative technology that can produce net-shape components with nearly unlimited geometrical complexity and customization. This technology also brings an opportunity to develop new and modified alloys specifically for LPBF, which warrants fundamental understanding of phase stability, diffusion kinetics and solidification so that the dependent process variables are desensitized for printability, and thermo-kinetic environment associated with LPBF are effectively utilized to optimize the functional properties. Selected observations of microstructural development in LPBF, such as grain structure, composition-sensitive solidification cracking, sub-grain micro-segregation, homogenization, and precipitation will be highlighted for additively manufactured Al-alloys, produced from gas atomized alloy powders made for both commercial and experimental applications. Practical use of phase diagrams and diffusion kinetics in designing and modifying the alloy composition for the enhanced buildability and properties will be presented with experimental corroboration.