THE YIELD STRENGTH MEASUREMENT OF LY-12 ALUMINIUM ALLOY UNDER HIGH TEMPERATURE

This paper introduces the yield strength measurement of LY-12 aluminium alloy under dynamic loading in temperature interval from room temperature to 400℃.This research utilizes one dimensional split Hopkinson pressure bars and the tubular furnace. The average stress-strain curves of specimens can be measured under different temperature conditions based on one dimensional theory of stress wave propagation and thier stress-strain curves also can be detected by strain gages directly. The yield strength and yield strength temperature curve can be obtained.