一方向凝固Ｎｉ基超合金のクリープに伴う電気化学的特性の変化と損傷評価

• 駒崎 慎一

• 庄子 哲雄

• 武市 徹也

• 佐藤 実

書誌事項

タイトル別名

• Changes in Electrochemical Properties of Directionally Solidified Ni-base Superalloy Due to Creep and Damage Evaluation.
• 1ホウコウ ギョウコ Niキ チョウゴウキン ノ クリープ ニ トモナウ デン

抄録

Changes in electrochemical properties of directionally solidified Ni-base superalloy CM 247 LC due to creep have been investigated. The electrochemical polarization technique has been applied to creep-ruptured and creep-interrupted specimens under various creep condition in order to examine a detectability of creep damage. Experimental results on electrochemical polarization measurements revealed that the peak current density "I_p" and "I_pr" which appeared at a specific potential during potentiodynamic polarization reactivation measurements in dilute glyceregia solution increased with increased thermal history and showed a good correlation with Larson-Miller Parameter value. I_p and I_pr value reflected both a thermal aging effect and a stress effect, and increased with a creep life fraction. The increases in I_p and I_pr were mainly corresponded to increases in preferential dissolution rate of γ' phase at γ/γ' interface. This preferential dissolution was considered as a result from degradation of corrosion resistance of γ'phase at γ/γ'interface which may be attributable to creep damage accumulation. As a consequence, the creep damage in CM 247 LC can be quantitatively evaluated by the electrochemical technique.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 64 (623), 1997-2004, 1998

  一般社団法人 日本機械学会

キーワード

• Nondestructive Inspection
• Electrochemistry
• Creep
• Electrochemical Property
• Directionally Solidified Ni-base Superalloy
• γ' Phase
• γ-Channel
• γ/γ' Interface
• Creep Damage Evaluation

詳細情報

• CRID: 1390282679424799232
• NII論文ID: 110002374674
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.64.1997
• ISSN: 18848338
• ISSN: 03875008
• NDL書誌ID: 4527028
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4527028
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/64/623/64_623_1997/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可