Evaluation of Surface Cracks Using Magnetic Flux LeakageTesting

查看全文 作　　者：Luming LI, Songling HUANG, Peng ZHENG and Keren SHINUT Center, Mechanical Engineering Department, Tsinghua University, Beijing 100084, China

出　　处：《Journal of Materials Science & Technology》索引2002年第18卷第4期,共3页

基　　金：This work was sponsored by the National Natural Science Foundation of China (Grant No.50001006). 摘　　要：The magnetic field distribution characteristics of surface cracks with various widths are discussed based on finite element (FEM) results. The crack depth was 0.20 mm, the width range was from 0.02 to 1.00 mm. The results showed that crack width and lift-off (the distance between surface and sensor) will influence signals. Discussed in this paper is the influence of various lift-off parameters on the peak to peak values of the normal component in magnetic flux leakage testing. The effects can be applied to evaluate surface breaking cracks of different widths and depths.An idea is presented to smooth narrow, sharp crack tips using alternating current (AC) field magnetization. 关键词：磁通量缝宽磁损失磁泄漏表面裂缝金属材料性能

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Evaluation of Surface Cracks Using Magnetic Flux LeakageTesting

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