stereoscan

The pattern of fracture by impact penetration test and tensile fatigue test of thermite welding with stereoscan was observed,and the component of defect with energy spectrum was analyed.

微观缺包括微孔和夹,其中微孔由微气孔和微缩孔组成,夹物按形态和尺分为团簇状夹、锥状夹、粒状夹、积聚物夹、丝状夹和混合形夹。