|About this Abstract
||MS&T23: Materials Science & Technology
||Metal Powder Synthesis and Processing: Fundamental Aspects and Modeling
||Advanced Characterization of Defects in Superalloy Powders Atomized by Various Methods and Effects on Net-shape HIP Product
||Benjamin Georgin, Hamish Fraser, Brian Welk
|On-Site Speaker (Planned)
The performance of additively manufactured product is directly related to the quality and purity of the input powder stock. This is especially true for superalloys, which are frequently used in critical applications where human and environmental safety are considered. In this talk, state-of-the-art electron microscopy techniques are used to characterize surface defects, non-equilibrium phases, non-metallic inclusions, and grain structures in rapidly solidified IN718 powder, produced using various atomization methods in argon, nitrogen, and helium atmospheres. Powders with varying size distributions were consolidated into net shape parts by hot isostatic pressing (HIP) and were evaluated across several length scales. HIP cycles were interrupted using an ultra-rapid quench (URQ) furnace to better understand the mechanisms of densification and evolution of microstructure during consolidation.