研究了金属间化合物合金 Ｎｉ－２０Ａｌ－－３０Ｆｅ的超塑性行为及其机理结果表明，该合金的显微组织由 β相和 γ／γ’相组成；在 １０２──１２５３ Ｋ， １．６７×１０－４—３．３４×１０－３ Ｓ－１拉伸变形时，合金呈超塑性，最大伸长率可达 ４６９％． ＳＥＭ分析发现超塑性变形试样的断口呈韧性特征，在断裂区有不均匀分布的空洞存在 The superplastic behavior and mechanism of the intermetallic compound Ni-20Al-30Fe were studied. The results show that the microstructure of the alloy is composed of β phase and γ / γ ’phase; at 102──1253 K, 1.67 × 10-4-3.34 × 10-3 S-1 Tensile deformation, the alloy was superplastic, the maximum elongation up to 469%. The SEM analysis shows that the fracture of the superplastic deformation specimen is characterized by ductile fracture, and the cavity with uneven distribution in the fracture zone exists