关键词: 本构方程, 修正的Johnson-Cook方程, 应力-应变曲线, 金属间化合物, IC10合金

Abstract:

The tensile experiments were conducted over a wide range of temperatures (25-800℃) and strain rates (10^-5-10^-2s^-1) on material test system(MTS809) to investigate the flow behaviors of alloy IC10. Experiments show that: the flow behaviors are not sensitive to strain rates at ambient temperature; the flow behaviors are sensitive to the temperature at the same strain rate of 10^-4s^-1; the yield stress changes little with the variation of experimental conditions at the range of temperatures (25-800℃) and strain rate (10^-5-10^-2 s^-1).Based on the experiments,the Johnson-Cook equation is modified and fitted,and the modified Johnson-Cook equation is used to predict the flow behaviors at different strain rates and different temperatures.The comparisons between models and experiments show that the modified Johnson-Cook equation works well in real prediction.

Key words: constitutive , equation,  , modified , Johnson-Cook , equation,  , stress-strain , curve, intermetallic , compounds,  , alloy , IC10