High-temperature Deformation Characteristics of Sintered Ti-6Al-4V Alloy Produced by Blended Elemental Method.

• Mizunuma Susumu

  Process Technology Recearch Lab., Nippon Steel Corp.

• Tomokiyo Toshimasa

  Nagoya R & D Lab., Nippon Steel Corp.

• Mimaki Toshitaro

  Steel Products Lab., Nippon Steel Corp.

• Fujii Hideki

  Steel Products Lab., Nippon Steel Corp.

• Naoi Hisashi

  Nippon Steel Techno Research Corp.

Bibliographic Information

Other Title

• 素粉末混合法により作製したＴｉ－６Ａｌ４Ｖ焼結合金の高温変形特性
• ソ フンマツ コンゴウホウ ニ ヨリ サクセイシタ Ti 6Al 4V ショウ

Abstract

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^-3 to5.8×10¹s^-1.<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.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 43 (7), 924-929, 1996

  Japan Society of Powder and Powder Metallurgy

Keywords

• titanium alloy
• extra low chlorine Ti powder
• master alloy
• CIP
• vacuum sintering
• HIP
• density
• Zenner-Hollomon parameter
• crack

Details

• CRID: 1390001206307330304
• NII Article ID: 10002012704
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.43.924
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 4004695
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4004695
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed