アルミニウム合金ダイカストの表面近傍に内在させたアルミナ薄片の表面弾性波計測

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タイトル別名
  • Surface Acoustic Wave Measurement of Alumina Thin Plate Inserted below Surface of Aluminum Alloy Die Castings
  • アルミニウム ゴウキン ダイカスト ノ ヒョウメン キンボウ ニ ナイザイ サセタ アルミナ ハクヘン ノ ヒョウメン ダンセイハ ケイソク

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<p>  An ultrasonic detection method for casting defects existing near the surface of die castings was developed. The surface acoustic wave (SAW) was measured with cast plates containing an alumina thin plate, measuring 0.2mm in thickness and 2mm in width, to simulate the oxide layer of the cold flake. The SAW intensity reflected from the alumina thin plate existing at a depth of 0.7mm or less was detected. The reflected SAW intensity increased with decreasing distance from the alumina thin plate, and became maximum just before the alumina thin plate. Next, the SAW intensity was measured by irradiating at different angles from the surface normal to the alumina thin plate. Finally, the mapping image of the alumina thin plate was obtained by moving the SAW probe parallel to the alumina thin plate.</p>

収録刊行物

  • 鋳造工学

    鋳造工学 85 (12), 886-891, 2013

    公益社団法人 日本鋳造工学会

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