Instability of the B2 Ordered Structure in TiNi Shape Memory Alloys due to Atom Displacements on (110) Planes

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抄録

Lattice instability due to the formation of lattice displacement waves (LDW) was investigated in the B2 ordered structure of Ti-Ni shape memory alloys using first principle calculations. The modified B2 structure with this LDW of the 1/2(011)[011] phonon mode have structural similarity with the B19′ monoclinic structure, which is martensitic structure known to appear in Ti-Ni alloys at low temperatures. The shift to optimal lattice positions for Ti and Ni atoms is determined by the force acting on each nucleus. Ni and Ti atoms are displaced from their original positions in the B2 structure without any potential barrier. The atomic displacements without any potential barrier can lead to precursor phenomenon in advance of martensitic transformations.

収録刊行物

  • Materials transactions

    Materials transactions 45(5), 1485-1488, 2004-05-20

    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)
    10013071091
  • 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
    6951154
  • 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  NDL  J-STAGE 
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