温度和剪应变率历史对扭转载荷作用下铁基合金本构关系影响的研究

Research for Temperature and Shear Strain rate History Effects on Constitutive Relation of Fe base Alloy under Torsion

用间歇式加载的方法,研究了温度和剪应变率历史在20 ～500℃和0 .00167 ～800s- 1 的范围内对扭转载荷作用下铁基合金本构关系的影响。试验结果表明:应变率历史对该材料具有强化作用,而且其强度随剪预应变率的升高而提高;

Temperature and shear strain rate history effects on the constitutive relations of Fe base alloy under torsion have been studied by means of interrupted load at temperatures from 20℃ to 500℃ and shear strain rates from 0.00167s -1 to 800s -1 .The experimental results show that shear strain rate history strengthens this material and its strength increases with the rising prestrain rate.Its sensitivity to the shear strain rate history decreases with the increasing temperature.