微細結晶粒を有するFe-Ni, Fe-Cr合金の超塑性について

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タイトル別名
  • On the Superplasticity of Grain Refined Fe-Ni and Fe-Cr Alloys
  • ビサイ ケッショウリュウ オ ユウスル Fe-Ni , Fe-Cr ゴウキン ノ チョウソセイ ニ ツイテ

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説明

Tensile tests of grain refined Fe-Ni and Fe-Cr alloys were carried out in the strain rate range 10−4 min−1∼10−1 min−1 in order to measure the strain rate sensitivity, m, in the α single phase, (α+γ) two-phase and γ single phase regions. The effect of the two-phase structure on the superplasticity was discussed.<BR>The largest value of m was obtained at a strain rate lower than \dotε=10−3 min−1 and in the (α+γ) two-phase region. In the (α+γ) two-phase region m depends strongly on strain rate, grain size and in particular the volume fraction of the γ phase, Vγ. The m value reached its maximum at the temperature corresponding to Vγ=0.5. Them value was also found to have a strong dependence on the metallographical characteristics of grain boundary.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 38 (8), 703-708, 1974

    公益社団法人 日本金属学会

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