|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Grain Boundary Engineering of a Low Stacking Fault Energy Ni-base Superalloy
||Joshua McCarley, Sammy Tin
|On-Site Speaker (Planned)
The effects of hot deformation parameters on an experimental Ni-based superalloy containing high levels of Co and a corresponding low stacking fault energy (SFE) were investigated. This investigation sought to quantify and subsequently understand the behavior and evolution of both the grain boundary structure and length fraction of Σ3 twin boundaries in the as deformed, sub-solvus (11150C), and super-solvus (11400C) annealed conditions. A processing map was constructed to identify the dominant deformation mechanisms, dislocation based plasticity or superplastic flow, associated with different processing parameters. Dislocation based plasticity mechanisms were found to largely promote grain refinement and the formation of twins following annealing while superplastic flow was found to provide little enhancement of twin boundaries and no grain growth upon annealing. The GBE characteristics of this low stacking fault energy alloy will be discussed and compared to a commercial Ni-base superalloy processed at similar conditions.
||Planned: EPD Congress Volume