|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Non-equilibrium Features of Grain Boundaries
||Changes in the Grain Boundary Character and Curvature Distributions of Nickel at Multiple Annealing Stages from Three-dimensional X-ray Microscopy
||Aditi Bhattacharya, C.M. Hefferan, S.F. Li, J. Lind, Yufeng Shen, R.M. Suter, G.S. Rohrer
|On-Site Speaker (Planned)
High purity polycrystalline Nickel was annealed at 800 °C and measurements were taken at five different points in time separated by 30 minute intervals. Near-field High Energy X-ray Diffraction Microscopy (nf-HEDM), a non-destructive, synchrotron based 3D characterization technique was used to track the microstructural evolution of nearly 2500 grains. The temporal change in crystallographic orientation and misorientation in the microstructure was measured over the different anneal states.
The data makes it possible to determine the grain boundary (GB) character distribution, the relative GB energies, and the GB curvature distribution at each time step during the interrupted thermal annealing. It was observed that the shapes and sizes of
individual grains change significantly during annealing. Using size, orientation, and location as selection criteria, individual grains were identified and tracked throughout multiple anneal states.
||Planned: Supplemental Proceedings volume