The feature of the fracture surface was examined by SEM and three kinds of fracture mechanisms were determined as follows; 1. quasi-shear fracture; 2. dimple fracture, and 3. quasi-cleavege.

 
  • 通过扫描电镜对断口进行分析,确定了三种基本断裂机制:(1)准切变,(2)韧窝;
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