Conventional ultrasonic NDT method is quite incompetence for the surfacefatigue crack testing of in service rotary shaft.
采用常规超声检测方法对在役转轴表面疲劳裂纹检测的效果很差。
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The importance of examination of surfacefatigue cracks in automobile repair is stated in this paper, and the features of fatigue fracture are briefly analysed.
The sampled data, sampled waveform and graph can be real time displayed, so that a supervision for the status of surfacefatigue crack growing can be accomplished.