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.

观缺陷主要包括和杂,其中气和缩组成,杂按形态和尺分为团簇状杂、锥状杂、粒状杂、积杂、丝状杂和混合形杂。