在 2 0～ 5 0 0℃和 0 .0 0 2 0 8～ 193s-1的范围内研究了温度和应变率历史对拉伸载荷下铁基记忆合金本构关系的影响。实验结果表明 ,应变率历史对该材料具有强化作用 ,而且随着预应变率的提高 ,其强度提高 ,延伸率降低。其对应变率历史的敏感性则随着温度的升高而降低 The effects of temperature and strain rate history on the constitutive relationship of Fe-based memory alloys under tensile load were studied in the range of 20 ~ 5000 ℃ and 0.0020 ~ 0.893s-1. The experimental results show that the history of strain rate has a strengthening effect on the material, and with the increase of pre-strain rate, the strength increases and the elongation decreases. Its sensitivity to the history of strain rates decreases with increasing temperature