利用高应变率扭 -拉复合加载的分离式霍布金森杆装置 ,对 2 0℃和 50 0℃下铁基形状记忆合金高应变率扭 -拉复合加载下的本构关系进行实验研究 .结果表明 ,高应变率扭 -拉复合加载下铁基形状记忆合金的强度和延伸率均随温度的升高而降低 ;扭转和拉伸之间存在相互耦合作用 ,并随温度的升高而减小 The constitutive relation of iron-based shape memory alloy under high strain rate and torsional-tensile loading at 20 ℃ and 50 ℃ was experimentally studied by using split Hopkinson bar assembly with high strain rate torsional-tension loading.Results The results show that the strength and elongation of Fe-based shape memory alloy decrease with the increase of temperature under the condition of high strain rate torsional-tension loading. The mutual coupling between torsion and tension decreases with the increase of temperature