Stress Relaxation of Elastic Precorsor for Unalloyed Uranium and Some Uranium-based Alloys

摘要

The first results related to the structure and parameters of elastic precursors in unalloyed depleted uranium and its alloy with molybdenum were obtained more than 40 years ago using the capacitor method [1-4]. The best time and amplitude resolution for the elastic precursor and a weak plastic wave within the range of aa< 15 GPa were detected during laser interferometric measurements in paper [5]. Some data on the stress relaxation of the elastic precursor for the U-0.75% Ti alloy are presented in [6-8]. The purpose of this work is to obtain data on stress relaxation of the elastic precursor in unalloyed depleted coarse-grained uranium and two uranium-base alloys in the case of their low-intensive explosive loading, as well as to approximate the published and new experimental data within the framework of the statistical thermo-fluctuation (STF) model [9].