Martensitic Transformation in Shape Memory Alloys under Magnetic Field and Hydrostatic Pressure

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Effects of magnetic field and hydrostatic pressure on martensitic transformation have been examined by using Fe–Pt, Cu–Al–Ni, Ni<SUB>2</SUB>MnGa and Fe–Pd shape memory alloys and Fe–Ni alloys. Following results are obtained; (i) in Fe–Pt, Cu–Al–Ni and Fe–Ni alloys, the experimental magnetic field and/or hydrostatic pressure dependence of martensitic transformation start temperature, <I>M</I><SUB>s</SUB>, is in good agreement with the dependence calculated by the equation previously proposed by our group to evaluate the relation between <I>M</I><SUB>s</SUB> and magnetic field and hydrostatic pressure. (ii) Giant magnetostriction has been observed in the martensite state of Ni<SUB>2</SUB>MnGa and Fe–31.2 at%Pd ferromagnetic shape memory alloy single crystals. The values (contraction of 3.8% for Ni<SUB>2</SUB>MnGa and expansion of about 3% for Fe–31.2 at%Pd) are nearly the same values as can be expected from the perfect conversion of variants, <I>i.e.</I>, variants are converted to preferable variants whose magnetocrystalline anisotropy energy is minimum among them under the magnetic field.

収録刊行物

  • Materials transactions

    Materials transactions 43(5), 887-892, 2002-05-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012322935
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6179568
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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