Effects of temperature on the flow stress of aluminum in shock waves and rarefaction wavesстатья
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Дата последнего поиска статьи во внешних источниках: 3 марта 2021 г.
Аннотация:Elastic-plastic waves of shock compression and unloading in aluminum AD1 were recorded at room temperature, 510 °C and 610 °C. Basing on the measured parameters of plastic shock waves and quasi-elastic rarefaction waves at the peak shock stresses from about 1.5 to 4.2 GPA, the strain rate dependences on the stress, the temperature and the loading history were obtained in the range of 105-107 s-1. While the initial resistance to high-rate deformation anomalously grows with increasing temperature, even a small deformation in the shock wave and the accompanying multiplication of dislocations changes the sign of the temperature dependence of the flow stress.