研究了晶粒尺寸为10—30μm的Ni3Al基合金的高温变形行为发现该合金在950—1100℃温区，应变速率约为2．1×10-4s-1时应变速率敏感指数m＞0．3，最大延伸率超过250％，具有超塑变形行为的特征金相及电子显微镜观察表明，变形过程中发生了明显的连续回复与再结晶．
The superplasticity behaviours of Ni3Al alloy with 10-30 pm grain sizes were investigated. The superplastic flow with a maximum elongation of 256% and strain rate sensitivity of 0.3 to 0.7 were observed at temperature range from 900 to 1100℃ and initial rate 2.1 ×10-4 s-1. As combined with optical and TEM observations, it is suggested that a continuous recovery and recrystallization process took place and superplasticity may arise from this process.
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