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首页> 外文会议>E'NDE'98: The 4th International Workshop on Electromagnetic Non-Destructive Evaluation Chatou, France September 17-18, 1998 >Nondestructive evaluation of A533B Steel by Hall Sensor
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Nondestructive evaluation of A533B Steel by Hall Sensor

机译：霍尔传感器对A533B钢的无损评估

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摘要

Nondestructive evaluation of low alloy steel (A533B) sample has been investigated using a GaAs Hall sensor for magnetic leakage flux detection and using a small pick-up coil for Barkhausen jump detection. A sensitive measurement of leakage magnetic field over the sample was performed in zero external field, after a sample polarization in 1 kOe external field. The residual stresses formed by 0.1 percent or less deformation and the magnetic anisotropies in the Luders band were found tilted at angles between 25-45 degree to the sample direction. It fits well with numerical simulations by FEM based on a model of different residual magnetizations, depending on local residual stresses. As an indicator of the material fatigue, average fields of discontinuous magnetizations are considered. They are functions of residual stresses and angles against the applied tensile stress direction.
机译：已对低合金钢（A533B）样品的无损评估进行了研究，使用GaAs霍尔传感器检测漏磁通量，并使用小型拾取线圈检测Barkhausen跳变。样品在1 kOe外部磁场中极化后，在零外部磁场中对样品上方泄漏磁场进行灵敏测量。发现由0.1％或更少的变形形成的残余应力以及Luders带中的磁各向异性相对于样品方向倾斜了25-45度之间的角度。它根据局部残余应力，基于不同残余磁化强度的模型，非常适合通过FEM进行的数值模拟。作为材料疲劳的指标，考虑了不连续磁化的平均磁场。它们是残余应力和相对于施加的拉应力方向的角度的函数。

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