Cu-Cr-Ti合金の時効にともなう組織変化について

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タイトル別名
  • On the Structure Changes Produced by Ageing of a Cu-Cr-Ti Alloy (Studies on the Precipitation of a Cu-Cr-Ti Alloy, 1st Report)
  • Cu-Cr-Ti ゴウキン ノ ジコウ ニ トモナウ ソシキ ヘンカ ニ ツイテ

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The structure changes were studied microscopically on a Cu-0.54%Cr-3.06%Ti alloy, which was solution-treated and aged at various temperatures from 550°C to 700°C. The grain boundary reaction was observed in the specimens aged at 550°C and 600°C. Together with the structure of pearlite type, the structure of Widmanstätten type was observed in the specimens which were aged at 600°C. However, when aged at 700°C, only the structure of Widmanstätten type was found without any trace of a pearlitic region. The crystal structure of the precipitates which were extracted with 50% nitric acid from specimens aged for 100 minutes at 550°C and for 480 minutes at 700°C respectively was studied by means of X-ray analysis. It was shown that the precipitates from both were β′-Cu3Ti and γ-TiCr2. The crystal planes upon which the precipitation of Widmanstätten type takes place were determined by three methods. The results obtained by use of these methods were in good agreement, that is, the precipitates of Widmanstätten type were parallel to (111) planes of the matrix crystal.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (8), 477-481, 1959

    公益社団法人 日本金属学会

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