(Fe_<1-x>V_x)_3Al合金(x≦1/3)の高温変形挙動に及ぼす規則-不規則変態の影響 Effects of Order-Disorder Transition on High-Temperature Deformation Behavior of (Fe_<1-x>V_x)_3Al Alloys (x≦1/3)

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著者

    • 馬渕 潤 MABUCHI Jun
    • 名古屋工業大学大学院工学研究科物質工学専攻 Department of Materials Science and Engineering, Nagoya Institute of Technology
    • 西野 洋一 NISHINO Yoichi
    • 名古屋工業大学大学院工学研究科物質工学専攻 Department of Materials Science and Engineering, Nagoya Institute of Technology

抄録

  The mechanical properties of (Fe<sub>1-<i>x</i></sub>V<sub><i>x</i></sub>)<sub>3</sub>Al alloys including the Heusler-type Fe<sub>2</sub>VAl (<i>x</i>=1/3) have been investigated using high-temperature compression tests with attention to an increase in the D0<sub>3</sub>(L2<sub>1</sub>)-B2 transition temperature <i>T</i><sub>c</sub> by the V substitution. The yield stress peak substantially shifts to higher temperatures with increasing <i>T</i><sub>c</sub> and can be found at around 1270 K for Fe<sub>2</sub>VAl. The strain rate sensitivity exponent <i>m</i> is near zero in the temperature range where the plateau with a rather low yield stress appears, but rises sharply around the peak temperature, reaching <i>m</i>=0.40 at 1300-1400 K for Fe<sub>2</sub>VAl. Thus superplastic behavior is always expected to occur in the (Fe<sub>1-<i>x</i></sub>V<sub><i>x</i></sub>)<sub>3</sub>Al system when deformed at temperatures above that of the yield stress peak under a strain rate range of 10<sup>-4</sup>-10<sup>-3</sup> s<sup>-1</sup>. In spite of large-grained Fe<sub>2</sub>VAl, the grain size becomes much finer after deformation up to a strain of 120%: from about 400 μm to 30 μm. Dynamic recovery and recrystallization process similar to that in Fe<sub>3</sub>Al is proposed as the superplastic deformation mechanism.<br>

収録刊行物

  • 日本金屬學會誌 = Journal of the Japan Institute of Metals  

    日本金屬學會誌 = Journal of the Japan Institute of Metals 69(10), 880-885, 2005-10-20 

    The Japan Institute of Metals

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各種コード

  • NII論文ID(NAID)
    10018277196
  • NII書誌ID(NCID)
    AN00062446
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214876
  • NDL 記事登録ID
    7711996
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-314
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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