Cu-Al系2元合金における共析および亜共析組成の恒温変態について

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タイトル別名
  • On the Isothermal Transformation of the Eutectoid and the Hypo-Eutectoid Compositions in Cu-Al Binary Alloys
  • Cu-Alケイ 2ゲン ゴウキン ニ オケル キョウセキ オヨビ アキョウセキ ソセイ ノ コウオン ヘンタイ ニ ツイテ

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抄録

Wassermann, Obinata and Kurdjumow reported that the β′ martensite is produced from β through β1, i.e. ordered β, on rapid cooling in Cu-Al binary alloys. As it is confirmed that the formation of β1 is not arrested even by water-quenching, it is interesting to find out some microscopic figures about β1 transformed from β, and as it may be supposed that the isothermal transformation of β is affected by the transformation β→β1, the authors have tried to determine the T/T/T-diagram for two kinds of specimens, namely of 11.44 wt% and 12.18 wt%Al contents. As the results of the present experiments, it was found that the process of the formation of β1 had an important part in the T/T/T-diagrams, and the eutectoidal precipitation appeared directly from β1 containing about 12.4 wt%Al at the temperature below Tc, i.e. the critical temperature for the transformation β→β1. It was also observed microscopically that some rosette or granular precipitates and the sheath enveloping α were accompanied by the formation of β1. The probable nature of the decomposition processes of β and β1 has been discussed.

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  • 日本金属学会誌

    日本金属学会誌 24 (11), 748-751, 1960

    公益社団法人 日本金属学会

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