材質中の傷の超音波写真について

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  • ザイシツ チュウ ノ キズ ノ チョウオンパ シャシン ニ ツイテ
  • Ultrasonic Photograph of Flaws in the Material

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Ultrasonic photograph of flaws in the material are obtained by scanning the sample between the sender and the receiver in oil, that is, they are obtained by recording the spots on the oscilloscope corresponding to intensity of ultrasonic waves which transmit through the each part of the sample. For acquiring the better result, the considerations for the problems respecting the width of the wave beam, diffraction, the dimension of flaw, distance between sender and receiver, shaking of the sample or oil and the character of the material are neccessary. And these conditions should be kept adequate. Among the above mentioned problems, especially, fine beam of the wave and no shaking of the material are most important and essential.

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