skip to main content


This content will become publicly available on December 28, 2018

Title: Temperature dependent elastic properties of γ-phase U – 8 wt% Mo

Polycrystalline elastic moduli and stiffness tensor components of γ-phase U – 8 wt% Mo have been determined by resonant ultrasound spectroscopy in the temperature range of 25-650°C. The ambient temperature elastic properties are compared to results measured via other experimental methods and show reasonable agreement, though there is considerable variation of these properties within the literature at both the U – 8 wt% Mo composition and as a function of Mo concentration. The Young’s modulus of U – 8 wt% Mo measured in this study decreases steadily with temperature at a rate that is slower than trends previously observed at similar Mo concentrations, though the difference is not statistically significant. This first measurement of the temperature dependent elastic stiffness tensor of a polycrystalline U-Mo alloy clarifies that the behavior of the Young’s modulus is due to a strongly weakening C 11 polycrystalline stiffness tensor component, along with milder decreases in C 12 and C 44. The unique partially auxetic properties recently predicted for singlecrystalline U-Mo are discussed in regard to their possible impact on the polycrystalline behavior of the alloy.
 [1] ;  [2] ;  [2] ;  [2] ;  [3]
  1. Univ. of Cincinnati, OH (United States)
  2. Y-12 National Security Complex, Oak Ridge, TN (United States)
  3. Univ. of Virginia, Charlottesville, VA (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 0022-3115
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 500; Journal Issue: C; Journal ID: ISSN 0022-3115
Research Org:
Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)
Sponsoring Org:
Country of Publication:
United States
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; U-Mo; Elastic Constants; Elastic Moduli; Resonant Ultrasound Spectroscopy
OSTI Identifier: