A new developed technique in nondestructive testing for residual stress of the ferromagnetic materials is discussed. 讨论了一种检测铁磁材料内部应力的无损检测新技术。
Combined nondestructive testing technology and photomicrography , defects can be observed in kinds of process conditions. 结合无损检测技术和显微镜的观测，能直观的看到不同工艺参数下试样缺陷分布情况，跟统计的孔隙率分布基本吻合。
