Ni-Fe基鍛造超合金Alloy 706のTTP挙動 Time-Temperature-Precipitation Behavior of Ni-Fe Base Wrought Superalloy 706

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The time-temperature-precipitation (TTP) diagram is essential in the design of heat treatments for any precipitation strengthened superalloy. Some TTP diagrams have been already presented for Ni-Fe-base superalloy 706, which has been used for high temperature services. However, the γ'-γ'' co-precipitate that is the most important strengthening agent in this alloy is not seen in the literature. Moreover, effects of aluminum, titanium and niobium, important substitutional elements in γ' and γ'' precipitates, on the TTP behavior are not clear. In this study, the TTP and the time-temperature-hardness (TTH) diagrams are presented of the commercial Alloy 706 and experimental alloys containing only one or two of the key elements in a temperature range from 600 to 900°C. The alloys containing Ti were all age-hardenable, especially at temperatures between 700 and 800°C. The observation by an optical microscopy, scanning electron microscopy and transmission electron microscopy revealed the γ', γ'', γ'-γ'' co-precipitates and η precipitates in those alloys. Among the three elements, titanium plays a most important role in the precipitation strengthening behavior of Alloy 706. Furthermore, both aluminum and niobium are virtually ineffective without incorporating titanium with them. Niobium promotes the γ'' formation and suppresses the η formation. Aluminum enhances the formation of stable γ'-γ'' co-precipitates, more effectively in the co-existence of titanium and niobium.

収録刊行物

  • 鐵と鋼 : 日本鐡鋼協會々誌

    鐵と鋼 : 日本鐡鋼協會々誌 82(10), 853-858, 1996-10-01

    一般社団法人 日本鉄鋼協会

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  • 安定化処理を施した Alloy 706 の析出挙動とクリープ特性との関係

    柴田 尚 , 主藤 祐功 , 吉野 勇一 , 高橋 達也 , 石黒 徹

    鐵と鋼 : 日本鐡鋼協會々誌 82(9), 765-770, 1996-09-01

    CiNii PDF - オープンアクセス  J-STAGE 参考文献24件 被引用文献1件

各種コード

  • NII論文ID(NAID)
    10003277627
  • NII書誌ID(NCID)
    AN00151251
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00211575
  • NDL 記事登録ID
    4047384
  • NDL 雑誌分類
    ZP42(科学技術--金属工学・鉱山工学--鉄鋼)
  • NDL 請求記号
    Z17-356
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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