Cavitation Damage Evaluation Using Laser Impacts

• Wan Tao

  Graduate School of Science and Engineering, Ibaraki University

• Naoe Takashi

  J-PARC Center, Japan Atomic Energy Agency

• Wakui Takashi

  J-PARC Center, Japan Atomic Energy Agency

• Futakawa Masatoshi

  J-PARC Center, Japan Atomic Energy Agency

• Maekawa Katsuhiro

  College of Engineering, Ibaraki University

抄録

Ultrasonic waves generated by a pulsed Nd-YAG laser are being adopted to evaluate the cavitation damage, so-called pitting, caused by proton beam injection in pulsed neutron sources. The wave’s propagation behavior depends on the density and depth of the pits. To quantitatively understand the relationship between the pits and the wave propagation behavior, the artificial pits were imposed on the evaluated specimen while controlling the density and depth. A laser Doppler vibrometer was used to remotely detect the ultrasonic waves generated by the Nd-YAG laser. It was found that the two parameters, namely, the maximum negative peak value and the attenuation of received waveforms were useful for quantitatively evaluating the damage. As a result, cavitation damage with a peak-to-peak roughness of more than 15 µm was successfully evaluated.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 55 (7), 1024-1029, 2014

  公益社団法人 日本金属学会

キーワード

• cavitation damage
• laser ultrasonic
• vibration velocity
• attenuation
• effective thickness

詳細情報

• CRID: 1390001204253587328
• NII論文ID: 130004455326
• NII論文ID: 40020109326
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.i-m2014813
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 025553601
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025553601
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/55/7/55_I-M2014813/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
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