Effects of Aging Treatment on the Bending Strength in AZ91D/Al_<18>B_4O_<33w> Composite

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著者

    • Wang W. G. WANG W. G.
    • Department of Mechanical System Engineering, Graduate School of Engineering, Hiroshima University
    • MATSUGI K.
    • Department of Mechanical System Engineering, Graduate School of Engineering, Hiroshima University
    • SASAKI G.
    • Department of Mechanical System Engineering, Graduate School of Engineering, Hiroshima University

抄録

Aluminum borate whisker (Al<SUB>18</SUB>B<SUB>4</SUB>O<SUB>33w</SUB>, denoted by ABO<SUB>w</SUB>) reinforced AZ91D (Mg-Al-Zn) magnesium alloy composites were prepared by squeeze casting. The composite was solution-treated at 683 K for 345.6 ks in argon atmosphere and then water-quenched. Aging treatment was carried out at 443 K in oil-bath. While the composite was cooled from the solution temperature of 683 K to room temperature, large thermal residual stress (TRS) was formed due to the mismatch of thermal expansion coefficient between ABO<SUB>w</SUB> and AZ91D matrix. The TRS of AZ91D matrix in as-quenched AZ91D/ABO<SUB>w</SUB> composite was measured with X-ray diffraction (XRD) and it was 103 MPa. After aging for 115.2 ks, the TRS relaxed and decreased to 45 MPa. Owing to the formation of precipitates, the bending strength of peak-aged composite (aged for 115.2 ks) was enhanced. Nevertheless, when the composite was aged for 345.6 ks, the bending strength decreased greatly. Even the bending strength of over-aged composite was lower than that of as-quenched composite. It is attribute to the coarsening of continuous precipitate within composite matrix close to whiskers.

収録刊行物

  • Materials transactions  

    Materials transactions 49(4), 850-853, 2008-04-01 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10021146007
  • 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
    9447618
  • 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  IR  J-STAGE 
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