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.

微观缺陷主要包括微孔和杂,其中微孔由微气孔和微缩孔,杂物按形态和尺分为团簇杂、杂、粒杂、积聚物杂、丝杂和混合形杂。