Decomposition of a metastable solid solution in uranium-molybdenum alloy

The process leading to the decomposition of a metastable solid solution (γ² phase) in uranium alloys with 13.6 and 20 at.% molybdenum under isothermal holding conditions at the temperature of the phase regions α+γ′ and α+γ of the phase diagram was examined. The proces was studied by the methods of metallography and x-ray crystallographic analysis. The changes in the microstructure and phase composition of the alloys as a function of the temperature and holding time were indicated. The decomposition process was represented in the form of C-shaped diagrams of the isothermal transformation of the γ² phase, which characterize the structural changes occurring in the aloy in the direction of the equilibrium state. It was found that the process occurs in stages, 6 figures, 7 references. Deceased. Federal Science Center of the Russian Federation—A. A. Bochvar All-Russia Scientific-Research Institute of Standardization in Machine Building. Translated from Atomnaya énergiya, Vol. 88, No. 1, pp. 43–48, January, 2000.