Mack Cullison
Profile Information
- Name
- Mr. Mack Cullison
- Institution
- Oregon State University
- Position
- Research Assistant / Teaching Assistant
- Biography
Mack Cullison is currently a PhD student at Oregon State University. His research interest are nuclear material science, specifically, accident tolerant materials, material treatments, and post irradiation characterization.
- Expertise
- Corrosion, EBSD, Nanoindentation, Oxide Dispersion-Strengthened Alloy (ODS), SEM, Transmission Electron Microscopy (TEM)
Publications:
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"Microstructure study of U-35 wt.% Zr alloy after quick annealing at 650 °C"
Mack Cullison,
Journal of Materials Research
Vol.
2020
1-8
Link
Uranium–35 wt.% zirconium (U–35 wt.% Zr) alloy was annealed for 1 h and 24 h at 650 °C and characterized to understand the early-stage microstructure evolution. Dendritic microstructure with fine (∼300 nm in length) α-U precipitates clustered between dendrite branches were observed in the 1-h annealed sample. After 24-h annealing at 650 °C, the α-U precipitates coarsened, and the dendritic microstructure disappeared because of microstructure homogenization. Furthermore, microchemical homogenization observed with energy-dispersive X-ray spectroscopy analysis suggests that α-U precipitates are approaching thermodynamic equilibrium in the 24-h annealed sample. The findings from this study have potential impacts on the manufacturing and computer modeling of metallic nuclear fuel. |
About Us
The Nuclear Science User Facilities (NSUF) is the U.S. Department of Energy Office of Nuclear Energy's only designated nuclear energy user facility. Through peer-reviewed proposal processes, the NSUF provides researchers access to neutron, ion, and gamma irradiations, post-irradiation examination and beamline capabilities at Idaho National Laboratory and a diverse mix of university, national laboratory and industry partner institutions.
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