| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Neutron Diffraction-based Assessment of Eutectoid Phase Transformation Kinetics in U-10Mo Alloys with Minor Ternary Alloying Additions of Cr, Co, and Ni |
| Author(s) |
Nathan E. Peterson, Daniel Malta, Saumyadeep Jana, Vineet Joshi, Sean Agnew |
| On-Site Speaker (Planned) |
Nathan E. Peterson |
| Abstract Scope |
U-10Mo alloys are proposed for replacement of highly enriched uranium fuels in research reactors. Below the eutectoid temperature of 560°C, the U(Mo) γ-phase (body centered cubic) solid solution decomposes into orthorhombic α-U and tetragonal γ’-U2Mo phases. The anisotropy of these phases is detrimental to in-reactor fuel performance. Thus, it is critical to develop an understanding of the γ-U(Mo) phase stability at sub-eutectoid temperatures. Here, minor (0.2wt%) ternary alloying additions (Cr, Ni, Co) have been examined using neutron diffraction to quantify the time and temperature dependence of the eutectoid transformation at 450, 500, and 525°C. The effect of the ternary additions on the reaction kinetics will be discussed, as well as the importance of the Debye-Waller factor in Rietveld refinement on the interpretation of the neutron scattering data in this study. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |