HeRX in γ/γ’ systems: Data-Driven Recrystallization Analysis
Heteroepitaxial Recrystallization is a strain driven recrystallization mechanism discovered to occur in gamma-gamma prime Ni-superalloys. HeRX is a mechanism of concern since it can lead to abnormal grain growth in superalloys, however the mechanism also hold’s promise for alternative processing methods resulting in recrystallization. The goal of this research is to determine which systems HeRX can occur in, which variables effect and activate the mechanism, and how the mechanism can be controlled.
Research Activities: Scanning Electron Microscopy (SEM), Electron Backscatter Diffraction (EBSD), Energy Dispersive Spectroscopy (EDS), Image Processing using MATLAB, Data processing using MTEX toolbox, Simulating strain/temperature using simulation tools (COMSOL Multiphysics, ABAQUS)
Current Group Members Involved: Yonguk Lee
Recent Publications:
- Y. Lee, C. Hale, E.J. Payton, & V.M Miller (2024). On the Formation of Multiply Coherent γ Grains in a Powder Metallurgy Ni Base Superalloy. In: Cormier, J., et al. Superalloys 2024. ISS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-63937-1_73
- Y. Lee, E. Hershkovitz, H. Kim, K.N. Wertz, E.J. Payton, & V.M. Miller. Prevalence of Heteroepitaxial Recrystallization in the Low Solvus High Refractory (LSHR) γ–γ′ Superalloy. Metallography, Microstructure, and Analysis 13, 114–129 (2024). https://doi.org/10.1007/s13632-023-01036-z