Research on mechanical properties and their temperature dependencies of LC9 alloys under dynamic load

The compression and tension tests of LC9 aluminum alloy were carried out at the temperature from 77 K to 573 K using SHPB, SHTB and CCSS88010 universal testing machine with the strain rate from 0.0011 s^-1 to 13000 s^-1. The stress-strain relationship was obtained. The research on its mechanical properties shows that the flow stress is not sensitive to the strain rate at room temperature; but sensitive to temperature. Finally, all the parameters of the model based on Johnson-Cook model were determined by curve-fitting. The prediction results based on the corresponding model agree fairly with the experimental data.