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A study was made of a uranium-2% Mo-2%Zr-2%Nb-0.5%Ti alloy in the rolled and forged conditions. It was found that, in the asworked condition, this alloy possessed little or no ductility. However, in the solution-treated and aged condition, it did possess a measurable amount (1 to 3 percent elongation) of ductility. (Author).
Uranium and its alloys are capable of being processed, fabricated and heat treated by many different methods. The deleterious effects of hydrogen on the mechanical properties of uranium and its alloys are well established. In this study the effects of certain processing procedures on hydrogen absorption and removal were investigated. Both unalloyed uranium and uranium-3/4 wt % titanium were involved in this work. The tensile test data for both materials clearly show the adverse effects of hydrogen absorption.
The effects of pile irradiations on the physical properties and corrosion resistance of U-- Mo, U-- Nb; and U--Si alloys are reported. The dimensional stability under irradiation of the gamma phase U-- Mo and U-- Nb alloys is excellent; however, an isotropic volume increase of 4 to 6% per wt.% burnup may limit the ultimate fuel element life. Corrosion resistance of the gamma-phase alloys appesrs to be improved when subjected to s neutron field; this is attributed to an irrsdiation induced stabilization of the gamma phases. The U/ sub 3/Si alloy, on the other hand, suffered severe deterioration, particularly of corrosion resistance. Changes in electrical resistivity, hardness, mechanical properties, and crystal structure are presented and the mechanisms producing the observed changes discussed.
From conference on physical metallurgy of uranium alloys; Vail, Colorado, USA (12 Feb 1974). A review of the state of the art is presented on the fabrication and properties of U-rich alloys in which the alloying elements are highly miscible in gamma -U (Nb, Zr, Ti, Mo). Processing of both low alloys (which will not retain a metastable gamma phase when quenched) and high alloys (which will retain a metastable gamma phase, usually greater than 6% Mo or Nb) is treated. Forging, extrusion, deep drawing, shear spinning, single-point turning, milling, drilling, tapping, and electrical discharge machining are discussed. Heat treatments (metastable, solution treatment, age hardening) to yield the desired mechanical properties are also discussed. (18 figures, 6 tables, 57 references) (DLC).