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Applied Research of Magnetic Memory Method (MMM) on Amusement Devices

机译:磁记忆法在娱乐设备上的应用研究

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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.
机译:由于压力集中,娱乐设备将被破坏。实验结果表明,疲劳损伤区域的表面磁场有规律地变化。微裂纹出现之前的表面磁场强于微裂纹出现之后的表面磁场。将尖端与裂纹中间进行比较,磁场不同。为了验证实验结果,已经在娱乐设备上进行了测试。根据磁信号的可疑区域已通过MT或ET重新测试。可以肯定的是,磁记忆法(MMM)可用于检查铁磁材料的疲劳损伤和微裂纹。根据测试结果,给出了一种新的MM信号分析方法。

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