Assessment for damage and degradation of structure material by ultrasonic techniques.

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  • NAKASHIRO Masashi
    Metallurgy Dept. Research Institute Ishikawajima-Harima Heavy Industries Co. Ltd

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  • 超音波による構造材料の劣化損傷評価
  • チョウオンパ ニ ヨル コウゾウ ザイリョウ ノ レッカ ソンショウ ヒョウカ

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Abstract

It is very popular NDE technology to detect the defects of structure material by ultrasonic techniques. But, it is need to develop the newly ultrasonic technique to assess the micro damages such as cavities and micro cracks in creep, fatigue and creep-fatigue damages. Recently, the assessment for these damages by ultrasonic techniques have been developed by many research organizations. This report are described the newly ultrasonic techniques to assess the material degradation by creep and fatigue etc.

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