Influence of processing on secondary phase formation and microstructural evolution at U-10Mo alloy and Zr interlayer interfaces

Kautz, Elizabeth J.; Song, Miao; Riechers, Shawn; Koziol, Adam; Briggs, Samuel A.; Yano, Kayla; Prabhakaran, Ramprashad; Schemer-Kohrn, Alan; Soulami, Ayoub; Joshi, Vineet V.; Devaraj, Arun

doi:10.1016/j.jallcom.2023.172074

Influence of processing on secondary phase formation and microstructural evolution at U-10Mo alloy and Zr interlayer interfaces

Journal Article · Sat Sep 09 00:00:00 EDT 2023 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2023.172074· OSTI ID:2305707

Kautz, Elizabeth J. ^[1]; Song, Miao ^[2]; Riechers, Shawn ^[2]; Koziol, Adam ^[3]; Briggs, Samuel A. ^[3]; ^[2]; ^[2]; ^[2]; Soulami, Ayoub ^[2]; Joshi, Vineet V. ^[2]; Devaraj, Arun ^[2]

Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); North Carolina State University, Raleigh, NC (United States)
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Oregon State Univ., Corvallis, OR (United States)

Thermo-mechanical processing of uranium-10 wt. % molybdenum (U-10Mo) fuel plates leads to microstructure changes at the U-10Mo/Zr interfaces. Secondary phases formed at this interface are particularly important to interfacial bond strength, process optimization, and maintaining structural integrity of the U-10Mo fuel plates during irradiation. In this work, we determined the phases and phase transformation products occurring at the interface of the U-10Mo fuel and Zr interlayer when the fuel plate is subjected to short and long hot isostatic pressure times. Interfacial morphology, structure and composition of phases formed, and relative hardness across the U-10Mo/Zr interfaces were studied using a multi-length scale, multi-modal characterization approach involving electron microscopy, atom probe tomography, and atomic force microscopy. Here, results highlight that the extent of phase transformations, secondary phase formation, and hardness variability across interfaces can be controlled by modifying processing parameters. Phase diagram construction and thermodynamic calculations were performed using the Thermocalc software to identify expected phases formed at interfaces during the maximum hold temperature of 560 °C experienced during HIP.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2305707

Report Number(s):: PNNL-SA--182384

Journal Information:: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 969; ISSN 0925-8388

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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