|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Forming of Components - Tailoring Specific Material Properties in Low Volume Production
||Effect of Heat Treatment on the Microstructure, Texture and Elastic Anisotropy of a Nickel-based Superalloy Processed
by Direct Laser Deposition
||Rocio Munoz Moreno, Divya Vadegadde Duggappa, Sarah Driver, Trevor Illston, Scarlett Baker, Howard J. Stone
|On-Site Speaker (Planned)
||Rocio Munoz Moreno
Direct-laser-deposition (DLD) of nickel-based superalloys is of great interest for the aerospace industry due to its capability for producing components with complex geometries. However, further understanding of the effect of DLD on alloy microstructures is required to ensure that components with appropriate properties are produced. In this study, the microstructure, texture and elastic anisotropy of the nickel-based superalloy, CM247LC, in the as-DLD and heat-treated states have been analyzed.
The as-DLD microstructure showed fine elongated cells with a preferential alignment of <100> along the build direction and a significant intercellular misorientation. Heat treatment below the 𝛾ʹ solvus resulted in progressive transformation into a coarsened, recovered structure and, at the highest temperatures, into a non-textured, recrystallized structure. The effect of carbides or 𝛾ʹ precipitates on boundary pinning is discussed. The bulk elastic anisotropy of all samples was analyzed by resonant ultrasound spectroscopy and were in agreement with the textures determined by EBSD.
||Planned: A print-only volume