Microstructures of Long-Period Stacking Ordered Phase of Mg-Zn-Y Alloy

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The microstructures of α-Mg, long-period stacking ordered (LPSO) phases, and kink bands in a Mg–Y–Zn alloy were observed by transmission electron microscopy (TEM). The results showed that extruded Mg<sub>97</sub>Zn<sub>1</sub>Y<sub>2</sub> alloy included different kinds of phases: 2H-Mg, 2H-Mg with many stacking faults, 14H and 18R. Kink bands tended to occur in areas where there were many intermetallic compounds. The element distribution of Zn/Y/Mg in the LPSO phase including kink boundaries was also analyzed by scanning TEM energy dispersive X-ray spectroscopy. The results showed that the concentrations of atomic Zn/Y decreased, while the concentration of atomic Mg increased at kink boundaries. This can be understood in terms of the dislocation structure of kink boundaries where extended <b><i>a</i></b>-dislocations lying on sequential stacking faults in the LPSO phase cause the annihilation of Zn/Y-rich stacking faults between two partial dislocations.

収録刊行物

  • Materials transactions

    Materials transactions 54(5), 632-635, 2013-05-01

    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)
    10031168402
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    SHO
  • ISSN
    13459678
  • NDL 記事登録ID
    024446868
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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