Quality assessment of welded joints by the metal magnetic memory method compared to conventional NDT methods and means for materialss properties assessment.
A principally new method of products and welded joints metal diagnostics, based on the use of metal magnetic memory (MMM) effect, is developed and successfully implemented in various industries of Russia and other countries nowadays. The MMM method ¨C is a non-destructive testing method based on distribution analysis of self-magnetic leakage field (SMLF) naturally formed during welding and operation. SMLF reading provides a unique possibility to integrally assess in the quick testing mode the actual weld state taking into account structural inhomogeneity and distribution of residual stresses and welding defects. At that no weld metal surface preparation is required. Criteria of power engineering welded joints assessment based on MMM-inspection results are presented. Results of different dimension-type pipeline welded joints comparative inspection by the MMM method and conventional NDT methods (radiography, ultrasonic testing) are given.
metal magnetic memory NDT residual stress self-magnetic leakage field
Anatoly DUBOV Sergey KOLOKOLNIKOV
Energodiagnostika Co. Ltd. Office 12, Yubileiny prospect, 8, Reutov, Moscow region 143965,
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
2384-2396
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）