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和
,其中微
由微气
和微
成,
物按形态和尺寸分
团簇状
、锥状
、粒状
、
聚物
、丝状
和混合形
。