|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Effect of Heat Treatment on the Microstructural Evolution of a Nickel-based Superalloy Produced by Powder Bed Fusion Laser Sintering
||Fan Zhang, Lyle E. Levine, Andrew J. Allen, Eric A. Lass, Mark R. Stoudt, Greta Lindwall, Michael B. Katz, Maureen E. Williams, Carelyn E. Campbell
|On-Site Speaker (Planned)
Additive manufacturing (AM) of metals involves repetitive rapid melting and solidification in the build process, which often leads to compositional and microstructural heterogeneities. If untreated, such heterogeneities could adversely affect materials performance. Stress relieving and homogenization heat treatments are often used to optimize the microstructures of AM alloys, although in situ experimental studies are lacking.
We have used a suite of synchrotron-based, high-energy X-ray scattering, diffraction, and imaging techniques to capture the real-time structure and microstructure evolution and phase landscape of nickel-based superalloy Inconel 625 under a wide range of heat-treatment conditions. These in situ measurements provide quantitative information concerning the time-dependent size and volume fraction evolution of the phases that were present. These results are nicely complemented by SEM and TEM observations as well as thermodynamic modeling predictions. Together, our results provide necessary kinetic datasets useful required for a better understanding of the process-structure-property relationship of AM alloys.
||Planned: Supplemental Proceedings volume