|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||N-27: Microstructural Evolution and Compositional Homogenization of As-cast Multicomponent Low Re-containing Ni-based Single Crystal Superalloy during Stepwise Solution and Aging Heat Treatments
||Xianglin Su, Qingyan Xu, Baicheng Liu
|On-Site Speaker (Planned)
Evolution of microstructure and elemental homogenization of as-cast multicomponent low Re-bearing Ni-based single crystal superalloy DD6 during stepwise solution and aging heat treatments has been detailedly studied. The study was investigated through microstructural characterization, compositional homogeneity measurements, differential scanning calorimetry, and thermodynamic calculations, quantifying the time-dependent size and volume fraction variations of interdendritic γ/γ′eutectic, the evolution of dendritic and interdendritc γ′precipitates, the evolution of interdendritic carbides, the evolution of compositional homogeneity across the microstructure, the change in thermo-physical characteristics of the alloy, and the solution behavior of γ′phase in dendritic cores, interdendritic and γ/γ′eutectic regions, to experimentally and theoretically understand these phenomena during the through progression of solution and aging heat treatments. Based on the experimental and theoretical results, the mechanism of microstructural evolution and the diffusion mechanism of elements during the through progression of solution and aging heat treatments has been discussed and clarified.
||Planned: Supplemental Proceedings volume