TY - JOUR
T1 - Phase identification and morphology in rolled and annealed U-22.5at.%Zr foils
AU - Williams, Walter J.
AU - Yao, Tiankai
AU - Sudderth, Laura
AU - Di Lemma, Fidelma
AU - Capriotti, Luca
AU - Okuniewski, Maria A.
N1 - Funding Information:
This research was partially supported by the US Department of Energy, Office of Nuclear Energy (NE), under DOE Idaho Operations Office Contract DE-AC07-05ID14517 through a Nuclear Science User Facilities experimental project and the Advanced Fuel Campaign. TEM Characterization took place in the Irradiated Material Characterization Laboratory at Idaho National Laboratory.
Publisher Copyright:
© 2021, The Author(s), under exclusive licence to The Materials Research Society.
PY - 2021/12
Y1 - 2021/12
N2 - A uranium-22.5 atomic% zirconium (U-22.5at.%Zr) alloy was characterized using transmission electron microscopy (TEM) following hot/cold-rolling, and again following a post-roll anneal as part of a novel fabrication process for the alloy. The TEM characterization included selected area electron diffraction, energy-dispersive X-ray spectroscopy (EDS), and bright field imaging. The δ-UZr2 phase fraction was 53.47% ± 0.09% in the rolled foil, substantially larger than the near-equilibrium value, 21.93% ± 0.03% in the annealed foil. Phase fractions and EDS analysis suggest a defect-driven U supersaturation in the δ-UZr2 phase. The lamellae mean random spacing was 0.21 μm ± 0.03 μm in the rolled foil and 0.70 μm ± 0.10 μm in the annealed foil. The δ-UZr2 L3 values were 0.11 μm ± 0.02 μm in the rolled foil and 0.16 μm ± 0.03 μm in the annealed foil. Zirconium inclusions in all foils were face-centered cubic (space group Fm-3 m), reinforcing that further investigations into the formation mechanism(s) and evolution of Zr inclusions are needed. Graphical abstract: [Figure not available: see fulltext.].
AB - A uranium-22.5 atomic% zirconium (U-22.5at.%Zr) alloy was characterized using transmission electron microscopy (TEM) following hot/cold-rolling, and again following a post-roll anneal as part of a novel fabrication process for the alloy. The TEM characterization included selected area electron diffraction, energy-dispersive X-ray spectroscopy (EDS), and bright field imaging. The δ-UZr2 phase fraction was 53.47% ± 0.09% in the rolled foil, substantially larger than the near-equilibrium value, 21.93% ± 0.03% in the annealed foil. Phase fractions and EDS analysis suggest a defect-driven U supersaturation in the δ-UZr2 phase. The lamellae mean random spacing was 0.21 μm ± 0.03 μm in the rolled foil and 0.70 μm ± 0.10 μm in the annealed foil. The δ-UZr2 L3 values were 0.11 μm ± 0.02 μm in the rolled foil and 0.16 μm ± 0.03 μm in the annealed foil. Zirconium inclusions in all foils were face-centered cubic (space group Fm-3 m), reinforcing that further investigations into the formation mechanism(s) and evolution of Zr inclusions are needed. Graphical abstract: [Figure not available: see fulltext.].
UR - https://www.scopus.com/pages/publications/85120643072
UR - https://www.mendeley.com/catalogue/726acdb9-2582-3e1a-acd9-4bc2cb062312/
U2 - 10.1557/s43580-021-00162-6
DO - 10.1557/s43580-021-00162-6
M3 - Article
AN - SCOPUS:85120643072
SN - 2059-8521
VL - 6
SP - 1037
EP - 1042
JO - MRS Advances
JF - MRS Advances
IS - 47-48
ER -