Creep Behavior of Orthorhombic Ti2AlNb Based Intermetallic Alloys
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- TANG Feng
- Materials Engineering Laboratory, National Institute for Materials Science
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- NAKAZAWA Shizuo
- Materials Engineering Laboratory, National Institute for Materials Science
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- HAGIWARA Masuo
- Materials Engineering Laboratory, National Institute for Materials Science
書誌事項
- タイトル別名
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- Creep and Fatigue at Elevated Temperatures. Creep Behavior of Orthorhombic Ti2AlNb Based Intermetallic Alloys.
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説明
For the purpose of studying the creep behavior of orthorhombic Ti2AlNb (O-phase) based alloys, nine O-based alloys modified by V, Mo, or W were prepared. These alloys were heat-treated under various conditions. The creep tests were carried out at 650-750°C/310MPa in air, using a dead-weight creep-rupture machine. The activation energy of creep was calculated to be 327 to 416kJ/mol, which showed that the creep process was controlled by a dislocation climb. The alloys modified by W exhibited lower steady-state creep rates and longer transient times than the alloys modified by Mo and V, which is thought to be due to the lower diffusion rate of W in O-based alloys. The transformation of B2 phase into O phase during creep test runs at temperatures lower than the aging temperature was responsible for the large transient creep strain in a B2+O alloy. The effect of precipitate size on creep behavior is discussed.
収録刊行物
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- JSME International Journal Series A Solid Mechanics and Material Engineering
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JSME International Journal Series A Solid Mechanics and Material Engineering 45 (1), 20-24, 2002
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282681469384704
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- NII論文ID
- 110002974762
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- NII書誌ID
- AA11179396
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- COI
- 1:CAS:528:DC%2BD38XivFyitbg%3D
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- ISSN
- 13475363
- 13447912
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- NDL書誌ID
- 6042819
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- 本文言語コード
- en
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- データソース種別
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- NDLサーチ
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