采用Gleeble-3800型热模拟试验机研究了高铝Ni3Al基合金在变形温度为1200～1240C,应变速率为0.01～1s-1条件下的热压缩变形,结果表明:在应变速率为0.01s-1时,高铝Ni3Al基合金对应的热变形本构方程为σ=28.57(lnε+ 6.72×105/RT-44.08),而当应变速率为0.1s-1和1s-1时,热变形本构方程为σ=28.57(lnε+1.28×106/RT-92.76).变形过程中只有γ′相发生不同程度上回溶,但未发生动态再结晶.合金的最佳变形区间位于变形温度为1200～1215℃,应变速率为0.01s-1范围内；而当提高速率至1s-1附近,γ′相中塞积的位错容易造成单相γ′区中β/γ′界面的开裂,对应变形过程中的“失稳区”.
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