Влияние Температуры На Динамический Предел Упругости И Откольную Прочность Свинцово-Висмутового Сплава При Давлении Ударного Сжатия До 2.4 GPa

Measurements of the Hugoniot elastic limit and the spall strength of the eutectic alloy Bi – 56.5 mass%, Pb – mass43.5% were carried out at sample temperatures in the range of 20 0C – 109 0C based on registration and analysis of the evolution of shock compression pulses of various amplitudes. It is shown that an increase in the temperature of the samples leads to a decrease in the Hugoniot elastic limit by 25%, and the spall strength of the alloy under study – by 30%, regardless of the strain rate. An increase in the strain rate by two orders of magnitude leads to an increase in the spall strength by about three times. Approximation power-law dependences of the decay of the elastic precursor on the thickness of the samples and the spall strength on the strain rate before fracture at normal and elevated temperatures are constructed.