TiAl基合金の繰返し引張変形特性に及ぼす試験雰囲気の影響 Effect of testing atmosphere on cyclic tensile deformation of TiAl-based intermetallic alloys

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著者

    • 金野 泰幸 KANENO Yasuyuki
    • 大阪府立大学大学院工学研究科物質・化学系専攻マテリアル工学分野 Materials Science, Graduate School of Engineering, Osaka Prefecture University
    • 今藤 敏和 KONDO Toshikazu
    • 大阪府立大学大学院工学研究科物質・化学系専攻マテリアル工学分野 Materials Science, Graduate School of Engineering, Osaka Prefecture University
    • 高杉 隆幸 TAKASUGI Takayuki
    • 大阪府立大学大学院工学研究科物質・化学系専攻マテリアル工学分野 Materials Science, Graduate School of Engineering, Osaka Prefecture University

抄録

TiAl-based intermetallic alloys with a lamellar microstructure and β containing duplex microstructure were cyclically tensile deformed in various environmental media as a function of temperature. Environmental media used in this study were vacuum, air and a mixture gas of H<sub>2</sub> gas+Ar gas. The environmental embrittlement, i.e., reduction of number of cycles to failure was observed when deformed in air as well as in Ar gas including H<sub>2</sub> gas. The severe environmental embrittlement was observed not only at room temperature but also at ~873 K. Fracture patterns and the associated fracture mode were not affected by the environmental media. The possible species causing the environmental embrittlement is suggested to be hydrogen atoms decomposed from water vapor (H<sub>2</sub>O) or hydrogen gas (H<sub>2</sub>). The feature observed in the present study was similar in both TiAl-based intermetallic alloys and, also to the previous observation, i.e., the feature of the environmental embrittlement observed in simply tensile deformed specimens.

収録刊行物

  • 軽金属  

    軽金属 58(9), 428-432, 2008-09-30 

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10021989671
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    9660779
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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