Ｔｉ‐４．５Ａｌ‐０．５Ｆｅ‐０．２Ｃ‐（Ｃｒ，Ｍｏ，Ｖ）合金の引張特性に及ぼす高温加熱の影響

DOI Web Site 被引用文献2件 参考文献11件
  • 小野 公輔
    (株) 神戸製鋼所加古川製鉄所薄板部冷延室
  • 田中 智文
    (株) 神戸製鋼所チタン本部チタン技術部技術室
  • 逸見 義男
    (株) 神戸製鋼所技術開発本部材料研究所材質制御研究室
  • 大山 英人
    (株) 神戸製鋼所加古川製鉄所薄板部チタン技術管理室

書誌事項

タイトル別名
  • Effect of elevated temperature exposure on tensile properties of Ti-4.5Al-0.5Fe-0.2C-(Cr, Mo, V) alloys
  • Ti-4.5Al-0.5Fe-0.2C-(Cr,Mo,V)合金の引張特性に及ぼす高温加熱の影響
  • Ti 4 5Al 0 5Fe 0 2C Cr Mo V ゴウキン ノ ヒッパリ トクセイ ニ オヨボス コウオン カネツ ノ エイキョウ

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抄録

Recently, Ti-4.5Al-4Cr-0.5Fe-0.2C has been developed. This alloy has excellent hot workability superior to the most widely used Ti-6Al-4V and comparable good mechanical properties, and contains only eutectoid-type beta stabilizers such as Cr and Fe in composition. Generally, eutectoid-type beta stabilizers embrittle the alloy after high temperature exposure because of the precipitation of intermetallic compounds such as TiCr2. In this study, we investigated the tensile properties of Ti-4.5Al-4Cr-0.5Fe-0.2C after exposure at various elevated temperatures for various times. It is found that the precipitation of TiCr2 makes this alloy brittle and that it takes place faster at 773 K than 523 K; embrittlement occurred after 8 h when exposed at 773 K while the alloy maintained good ductility even after 1000 h when exposed at 573 K. In order to suppress the precipitation of TiCr2, after exploring alloy compositions for both good ductility after exposure and good hot workability, Ti-4.5Al-2Cr-1.7Mo-1.3V-0.5Fe-0.2C, where Mo and V substitute Cr in Ti-4.5Al-4Cr-0.5Fe-0.2C, has been obtained. The new alloy has shown to be able to suppress precipitation of TiCr2 and to maintain much better ductility than Ti-4.5Al-4Cr-0.5Fe-0.2C after long time exposure at 773 K.

収録刊行物

  • 軽金属

    軽金属 55 (12), 673-677, 2005

    一般社団法人 軽金属学会

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