结果表明，造成主蒸汽滤网开裂的主要原因是晶界高温氧化，断口呈典型的沿晶开裂特征。
The results show that the main reason for the cracking was high temperature intergranular oxidation, with the fracture morphology being a typical intergranular cracking character.
在最佳超塑性条件下，断口中形成了大而深的空洞，晶界滑动和晶间断裂特征明显。
The deep and large cavities are formed on fracture surface and grain boundary sliding and intergranular fracture characteristic is obvious on the optimal superplastic deformation condition.
在最佳超塑性条件下，断口中形成了大而深的空洞，晶界滑动和晶间断裂特征明显。
The deep and large cavities are formed on fracture surface and grain boundary sliding and intergranular fracture characteristic is obvious on the optimal superplastic deformation condition.
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