研究了原始晶粒尺寸为 2 0 0 μm的 Ni- 48Al单相金属化合物的高温变形行为 .结果表明 ,该合金在 1 0 2 5～ 1 1 0 0°C,应变速率 1 .2 5× 1 0 -4～ 2× 1 0 -3 s-1内呈现超塑性变形 ,在 1 1 0 0°C、应变速率 1 .1 2 5× 1 0 -3 s-1时 ,最大延伸率可达 1 88.2 % .显微结构分析表明 ,原始大晶粒组织经超塑性变形后显著细化 ,大晶粒超塑性变形机理为高温变形过程中发生的连续动态回复与再结晶 The high temperature deformation behavior of Ni-48Al single phase metal compound with original grain size of 200 μm was investigated. The results show that the alloy has a high strain rate of 1.25 × 1 at 1 0 2 5 ~ 1 1 0 0 ° C, In the range of 0-4 ~ 2 × 10-3 s-1, the maximum elongation reaches 1 at 1100 ℃ and strain rate of 1.125 × 10-3 s-1 88.2% .Microstructure analysis shows that the original large grain structure after superplastic deformation significantly refined, large grain superplastic deformation mechanism for high temperature deformation occurred during the continuous dynamic recovery and recrystallization