Feature of magnetic memory signals of crack and incomplete penetration in welding joints

摘要：

The effect of the angle between defects and detecting directions of magnetic memory testing on the feature of magnetic memory signals was studied. It was found Hp(y) had zero cross point upon defects when detecting perpendicular to defects; while Hp(y) had opposite polarities and varied oppositely in the two sensors above heat affected zones as detecting parallel to it. The results suggest MMMT can detect defects with good sensitivity without considering the relative angle between defects and detecting direction. MMMT can be used in identifying crack, incomplete penetration, edge offset, etc.

关键词： Crack Incomplete penetration Metal magnetic memory testing technique Welding defects

作者: Pengju Guo Haijiang Zhao Weihe Guan Xuedong Chen

作者单位: Hefei General Machinery Research Institute - National Engineering & Technical Research Center on Pressure Vessels and Piping Safety,Hefei 230031, China

会议类型: 国际会议

会议名称: 2012 International Symposium on Structural Integrity 2012国际结构完整性学术研讨会 ISSI 2012

会议地点: 济南

会议语种:英文

页码: 251-254

在线出版日期: 2012-10-31（万方平台首次上网日期，不代表论文的发表时间）