Nb-Zr合金の相分解に及ぼす弾性拘束の影響

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タイトル別名
  • Effect of Elastic Constraint on Phase Decomposition in Nb-Zr Alloys
  • Nb-Zr ゴウキン ノ ソウ ブンカイ ニ オヨボス ダンセイ コウソク ノ エイキョウ

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抄録

Microstructural changes in Nb-20, 30, 40, 50 and 60 at%Zr alloys aged at 673∼973 K were mainly observed by means of transmission electron microscopy, and five time-temperature-transformation (TTT) diagrams of each composition and a coherent binodal line was obtained experimentally. The results obtained are as follows: (1) Sequences of the phase transformation in this alloy system are divided into four types. (2) An area of the coherent phase decomposition of the β phase is asymmetric and is located at about 400 K lower temperature than that of the chemical phase decomposition, which shows a strong elastic constraint on the phase decomposition in this alloy system. (3) The area of the coherent phase decomposition predicted based on the system free energy theory agrees well with the experimental one.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 63 (4), 422-428, 1999

    公益社団法人 日本金属学会

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