Al–Mg二元系合金の熱力学的解析とスピノーダル線を含む状態図の決定

• 古後 翔佑

  横浜国立大学大学院工学府システム統合工学専攻大学院生

• 岩岡 秀明

  横浜国立大学大学院工学研究院機能の創生部門

• 廣澤 渉一

  横浜国立大学大学院工学研究院機能の創生部門

書誌事項

タイトル別名

• Thermodynamic assessment and determination of phase diagram including spinodal lines in Al–Mg binary alloy
• Al-Mgニゲンケイ ゴウキン ノ ネツリキガクテキ カイセキ ト スピノーダルセン オ フクム ジョウタイズ ノ ケッテイ

抄録

Although several thermodynamic modelling have been carried out for the Al–Mg alloy system, no previous thermodynamic descriptions could calculate the metastable phase diagram of L1₂-type ordered GP zones (Al₃Mg). In this study, Calphad-type thermodynamic assessment of Al–Mg binary alloys was performed to determine not only the miscibility gap but also the spinodal lines of GP zones. The Gibbs energies of fcc-Al solid solution and ordered GP zones were expressed by a four-sublattice model (split compound energy formalism), and a complete thermodynamic description was obtained from available experimental data; e.g. miscibility gap of GP zones or equilibrium phases, and thermal quantities of mixing enthalpy and activity. The calculated miscibility gap and spinodal lines could satisfactorily reproduce experimentally reported reliable data, and thus the equilibrium between fcc-Al solid solution and ordered GP zones was successfully evaluated for the first time.

収録刊行物

• 軽金属

  軽金属 67 (5), 173-178, 2017

  一般社団法人 軽金属学会

キーワード

• aluminum–magnesium alloy
• phase diagram
• spinodal line
• Calphad method
• thermodynamics

詳細情報

• CRID: 1390282681317549056
• NII論文ID: 130007314766
• NII論文ID: 40021192993
• NII書誌ID: AN00069773
• DOI: 10.2464/jilm.67.173
• ISSN: 18808018
• ISSN: 04515994
• NDL書誌ID: 028176091
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028176091
• Web Site: https://www.jstage.jst.go.jp/article/jilm/67/5/67_670509/_pdf
• 本文言語コード: ja
• データソース種別:
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