Applied Research of Magnetic Memory Method (MMM) on Amusement Devices
Because of the stress concentration, amusement devices will be destroyed. Lab experiments results show that the surface magnetic field on the fatigue damage region ischanged regularly. The surface magnetic field before the micro-cracks appeared is stronger than after appeared. Compared the tip with the middle of the crack, the magnetic filed is different. In order to validate the experiments results, testing on amusement devices had been done. The dubitable region according to magnetic signals had been retested by MT or ET. It is confirmed that Magnetic Memory Method (MMM) can be used to inspect fatigue damage and micro-cracks of ferromagnetic materials. And a new MM signals analyzed method is given according to the testing results.
MMM fatigue damage micro-cracks amusement devices
Bin HU Gongtian SHEN Luming LI yan WU
China Special Equipment Inspection & Research Institute, Beijing China2 School of Aerospace, Tsinghu School of Aerospace, Tsinghua University, Beijing China
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
2619-2625
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）