Abstract

High purity binary uranium alloy specimens with 1_??_ Mo, prepared with electrolytic uranium produced by the Japan Atomic Fuel Corporation, and U-Mo master alloy produced by Mitsubishi Atomic Power Industries, Inc. by co-reduction process were distributed in 1962 among the members organizations represented the Committee (Furukawa Electric Co., Japan Atomic Energy Research Inst., Atomic Fuel Corp., Hitachi, Mitsubishi Atomic Power Industries, Osaka University, Sumitomo Metal Industries and the University of Tokyo). In the ensuing period to 1965, the member organizations carried out the following tests: (1) Thermal cycling, (2) High temperature hardness, (3) Thermal expansion, (4) Internal friction, (5) Creep, (6) High temperature tensile test, (7) Metallography and (8) T-T-T curve determination. The results of similar tests carried out in different organizations could thus be compared with each other, and discussions were held among the Committee members as to the cause of discrepancies in the data, if any.Metallographic tests of 16 binary uranium alloys prepared by arc melting have also been performed among eight laboratories. Photomicrographs thus obtained are reproduced in the present article, and should prove useful in identifying the phases appearing in various uranium alloys.

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