The results showed that the grain boundary cohesion become weaker and intergranular fracture became dominant with the increasement of superplastic deformation temperature.
结果表明，变形温度愈高，晶界结合强度愈低，沿晶断裂愈明显，晶界滑动愈易实现；
The results showed that the grain boundary cohesion become weaker and intergranular fracture became dominant with the increasement of superplastic deformation temperature.
结果表明，变形温度愈高，晶界结合强度愈低，沿晶断裂愈明显，晶界滑动愈易实现；
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