素粉末混合法により作製したTi-6Al-4V焼結合金の高温変形特性 High-temperature Deformation Characteristics of Sintered Ti-6Al-4V Alloy Produced by Blended Elemental Method

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The high temperature deformation characteristics of sintered Ti-6Al-4V alloy were investigated using specimens produced by the process of blending of extra-low-chlorine Ti and 60mass%Al-40mass%V master alloy powders, CIP and vacuum sintering. Hot compression tests were carried out using Formaster test machine at the temperatures ranging from 1123 to 1323K and at the strain rates from 1×10<SUP>-3</SUP> to5.8×10<SUP>1</SUP>s<SUP>-1</SUP>.<BR>Cracks are formed more easily in the specimens with lower relative density and at the higher reduction ratio. At the temperatures in the single β phase region, the crack formation becomes more easy at the higher strain rates. On the other hand, higher strain rates rather suppress crack formation at the temperatures in the α+β two phase region. The flow stress, deformation temperature and strain rate can be correlated with Zenner-Hollomon parameter, and the activation energy for deformation is higher than the previously reported value which was obtained using wrought material. Hot deformation converts the coarse microstructures in the as-sintered specimens to refined ones, which are believed to exhibit excellent mechanical properties.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 43(7), 924-929, 1996-07-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002012704
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4004695
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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