書誌事項
- タイトル別名
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- High-Selectivity Imaging of Closed Cracks in Weld Part of Stainless Steel Using Subharmonic Phased Array with a Single Array Transducer
- タンイツ アレイ ノ サブハーモニック チョウオンパ フェーズドアレイ SPACE ノ カイハツ ト ステンレス コウ ヨウセツブ ノ トジタ オウリョク フショク ワレ ノ コウセンタクセイ エイゾウカ
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抄録
To ensure the safety and reliability of structures such as nuclear power plants, it is necessary to detect closed cracks by nonlinear ultrasonic methods. Among them, the novel imaging method, subharmonic phased array for crack evaluation (SPACE) is a practical solution. SPACE uses a LiNbO3 transmitter and array receiver based on the subharmonic waves and phased array. In this paper, we developed SPACE with a single array transducer applicable to small objects. We imaged a stress corrosion crack (SCC) in a heat affected zone (HAZ) of type 304 stainless steel specimen, formed in high temperature pressurized water to simulate the actual cracks formed in nuclear power plants. As a result, we succeeded in visualizing the closed crack tip in the subharmonic image with high selectivity, although the specimen led to strong linear scattering at the grain boundaries. This result will significantly contribute to improving the safety and reliability of nuclear power plants.
収録刊行物
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- 非破壊検査
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非破壊検査 60 (11), 658-664, 2011
一般社団法人 日本非破壊検査協会
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詳細情報 詳細情報について
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- CRID
- 1390282681470224000
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- NII論文ID
- 10029879612
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- NII書誌ID
- AN00208370
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- NDL書誌ID
- 11290860
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- ISSN
- 03675866
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可