金属磁记忆检测的原理和应用

物理测试, 2007, 25(2): 25-0.

金属磁记忆检测的原理和应用

1.1.北京科技大学应用科学学院，北京 100083

1.1．School of Applied Science, University of Science and Technology Beijing，Beijing 100083,China ；2． Research Institute of China National Petroleum Corporation, Langfang 065000, Hebei, China

关键词：金属磁记忆 , selfmagnetic leakage field (SMLF) , nondestructive testing (NDT) , residual stress concentration , null

Theory and Application of Testing for Metal Magnetic Memory

WANG Li , FENG Mengli , DING Hongsheng , BAI Shiwu , LIU Fangming

Keywords： metal magnetic memory , 自磁化漏磁场 , 无损检测 , 残余应力集中 , 磁弹性效应

金属磁记忆（MMM）检测技术是一种新的无损检测手段，对金属构件的早期失效和寿命评估有重要意义。文章介绍了当前磁记忆技术在国内外的发展应用情况，着重阐述了磁记忆现象及其产生的物理基础和能量平衡解说，介绍了检测机理和检测仪，结合目前的应用情况，提出了磁记忆检测在今后可以应进一步完善的方面。

Metal Magnetic Memory (MMM) is a new nondestructive testing (NDT) technique. It is important on early diagnostics of fatigue damages and evaluatuion of life time. The development and applications of MMM are described. Moreover the corresponding physical fundamentals, the conversation of energy, the principles of inspection and the apparatus are introduced, and their fields to be solved in shortterm are summarized.

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