Phase Equilibria and Microstructure on γ' Phase in Co-Ni-Al-W System

• Shinagawa Kazuya

  Department of Materials Science, Graduate School of Engineering, Tohoku University

• Omori Toshihiro

  Department of Materials Science, Graduate School of Engineering, Tohoku University

• Sato Jun

  Department of Materials Science, Graduate School of Engineering, Tohoku University

• Oikawa Katsunari

  Department of Materials Science, Graduate School of Engineering, Tohoku University

• Ohnuma Ikuo

  Department of Materials Science, Graduate School of Engineering, Tohoku University

• Kainuma Ryosuke

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

• Ishida Kiyohito

  Department of Materials Science, Graduate School of Engineering, Tohoku University

書誌事項

タイトル別名

• Phase Equilibria and Microstructure on γ′ Phase in Co-Ni-Al-W System
• Phase equilibria and microstructure on g phase in Co Ni al W system
• Phase Equilibria and Microstructure on γ′ Phase in Co-Ni-Al-W System

抄録

Phase equilibria between the γ and γ′ phases at 900°C in the Co-(10–70)Ni-Al-W system were determined by electron probe microanalysis (EPMA) and X-ray diffractometry (XRD). It was found that the γ′ phase with L1₂ structure continuously exists from the Co side to the Ni side in Co-Ni-Al-W system and that it widens to the low W region with increasing Ni content. The partition of Al into the γ′ phase increased with Ni content, while the W changed from a γ′ former to a γ former by increase of Ni content. Differential scanning calorimetry (DSC) measurements also revealed that the γ′ solvus temperature increases with Ni content, while the solidus temperature is hardly affected by such content. The lattice parameter of the γ and γ′ phases and the mismatch decreased with increasing Ni content, which caused the morphologic change of the γ′ precipitates from cubes to spheres.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 49 (6), 1474-1479, 2008

  公益社団法人 日本金属学会

キーワード

• cobalt-nickel-aluminum-tungsten
• phase equilibria
• phase stability
• L1<SUB>2</SUB> compound
• lattice parameter
• superalloy

詳細情報

• CRID: 1390282679225765504
• NII論文ID: 10021147933
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.mer2008073
• ISSN: 13475320
• ISSN: 13459678
• HANDLE: 10097/51935
• NDL書誌ID: 9519626
• Web Site: https://tohoku.repo.nii.ac.jp/records/26544
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9519626
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/49/6/49_MER2008073/_pdf
• 本文言語コード: en
• データソース種別:
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  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可