Influence of Fabrication on Structure and Properties of Uranium; VLIYANIE TEKHNOLOGII IZGOTOVLENIYA NA STRUKTURY I SVOISTVA URANA

The report describes the results obtained from the investigation of changes in the structure and mechanical properties of cast and hot-rolled uranium by quenching as well as by deformation and annealing at the alpha phase temperatures. Data are given on the macro- and microstructures of cast and hot- rolled uranium and its mechanical properties which were determined in a wide temperature range, both in short and prolonged testing. Quenching from the BETA and gamma phases is shown to lead to a sharp change in the uranium structure. The investigation of the microstructure of uranium rolled and annealed in the alpha phase resulted in defining the basic recrystallization characteristics and in plotting approximate recrystallization diagrams. The presence of avalanche twinning during the deformation of textured uranium is shown experimentally. Result s are given of investigations of the anisotropy of textured uranium mechanical properties. (auth)