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,其中微孔由微气孔微缩孔组成,物按形态尺分为团簇状、锥状、粒状、积聚物、丝状混合形。