516 2.25%Cr-1%Mo 鋼のクリープ損傷に伴う超音波減衰と材料微視組織の変化

• 大谷 俊博

  荏原総研

• 荻 博次

  大阪大学

• 平尾 雅彦

  大阪大学

書誌事項

タイトル別名

• Change of Ultrasonic Attenuation and Microstructure Evolution in Crept 2.25%Cr-1%Mo Steels

抄録

We studied microstructure evolution caused by creep in 2.25%Cr-1%Mo steel using ultrasonic attenuation. The material was exposed to the temperature of 923K at various stresses. We used electromagnetic acoustic resonance (EMAR) to measure attenuation. EMAR is a contactless acoustic-resonance method and is free from energy losses associated with contact transducer, resulting in the intrinsic attenuation solids. We use an axial-shear-wave EMAT, which transmits and receives SH wave propagating in the circumferential direction of a cylindrical specimen. The attenuation exhibits much larger sensitivity to the damage accumulation than the velocity. We explain the attenuation evolution with the microstructure change, especially, through the dislocation damping, which is supported by TEM observations. The technique has a potential to assess the damage advance and predict the creep life of metals

収録刊行物

• 材料力学部門講演会講演論文集

  材料力学部門講演会講演論文集 2002 (0), 423-424, 2002

  一般社団法人 日本機械学会

キーワード

• Creep Damage
• Electromagnetic Acoustic Resonance (EMAR)
• Dislocation Damping
• Ultrasonic Attenuation
• Noncontact Evaluation
• 2.25Cr-1Mo Steel

詳細情報

• CRID: 1390282681044314880
• NII論文ID: 110002488380
• DOI: 10.1299/jsmezairiki.2002.0_423
• ISSN: 24331287
• Web Site: https://www.jstage.jst.go.jp/article/jsmezairiki/2002/0/2002_423/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可