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METHOD FOR THE CHARACTERIZATION OF MATERIAL IN A PLATED FERROMAGNETIC MATERIAL SPECIMEN

机译：平板铁磁材料中材料的表征方法

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A description is given of a method for the characterization of material in a plated ferromagnetic material specimen by means of a nondestructive ultrasonic transducer technique, in which ultrasonic waves are excited within the material specimen by way of magnetostrictive ultrasonic wave excitation, received by means of a reciprocally acting magnetostrictive transducer technique and evaluated. The invention is distinguished by the fact that a magnetic field oriented parallel to the surface of the material specimen is introduced into the material specimen with a variable magnetic field strength and is superimposed on an RF field, that ultrasonic waves in the form of linearly polarized transversal waves form within the material specimen with a direction of propagation oriented perpendicularly to the surface of the workpiece, and that the magnetic field acting on the material specimen is picked up by sensors, and that, within at least a predeterminable time window, receiving signals that can be assigned to the ultrasonic waves received are recorded and taken as a basis for the evaluation while taking the variable magnetic field strength into consideration.
机译：给出了通过无损超声换能器技术表征镀层铁磁材料样品中材料的方法的描述，其中通过磁致伸缩超声波激发在材料样品中激发超声波，并通过超声波接收。往复作用的磁致伸缩换能器技术并进行了评估。本发明的特征在于，平行于材料样本表面定向的磁场以可变的磁场强度被引入到材料样本中并叠加在RF场上，超声波以线性极化的横向形式出现。在材料样本中形成的电磁波的传播方向垂直于工件表面，并且作用在材料样本上的磁场被传感器吸收，并且在至少一个预定的时间窗口内接收到以下信号：在考虑可变磁场强度的同时，将被分配给接收到的超声波的信号“ R”分配并作为评估的基础。

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