Tensile and Fatigue Properties of Carbon-Solute-Strengthened (α+β)-Type Titanium Alloy
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- Nakai Masaaki
- Institute for Materials Research, Tohoku University
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- Niinomi Mitsuo
- Institute for Materials Research, Tohoku University
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- Hieda Junko
- Institute for Materials Research, Tohoku University
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- Cho Ken
- Institute for Materials Research, Tohoku University
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- Akahori Toshikazu
- Faculty of Science and Technology, Meijo University
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- Hayashi Kazuhiro
- Graduate School of Engineering, Tohoku University
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- Itsumi Yoshio
- Titanium Research and Development Section, Kobe Steel, Ltd.
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- Murakami Shogo
- Materials Research Laboratory, Kobe Steel, Ltd.
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- Oyama Hideto
- Titanium Research and Development Section, Kobe Steel, Ltd.
書誌事項
- タイトル別名
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- Tensile and Fatigue Properties of Carbon-Solute-Strengthened (α+β)-Type Titanium Alloy
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The effects of interstitial carbon solute and titanium carbide on the tensile and fatigue properties of an (α+β)-type titanium alloy, Ti–4.5Al–2.5Cr–1.2Fe–0.1C (KS Ti-531C), with bimodal and Widmanstätten α structures were investigated. In order to control the microstructures, this alloy was subjected to annealing at temperatures just below and just above the β-transus (531C-α+β annealed and 531C-β annealed, respectively). The microstructure of 531C-α+β annealed shows a bimodal structure and any titanium carbide is not observed, whereas that of 531C-β annealed shows a Widmanstätten α structure and some titanium carbides, which are considered to be Ti2C, are observed. The tensile strength and elongation of 531C-α+β annealed and 531C-β annealed are similar, but 0.2% proof stress is higher and further the reduction of area is much larger for 531C-α+β annealed than 531C-β annealed. Their tensile properties depend mainly on the type of microstructure and interstitial element partitioning because the titanium carbide is not observed on the fractured surfaces of both the alloys after tensile tests. Also, the fatigue properties of 531C-α+β annealed are better than those of 531C-β annealed. The titanium carbide is observed on the fractured surface of 531C-β annealed, but not observed on that of 531C-α+β annealed, after fatigue tests. Therefore, titanium carbide is considered to cause deterioration in the fatigue properties of 531C-β annealed compared to those of 531C-α+β annealed.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 54 (2), 169-175, 2013
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204251674112
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- NII論文ID
- 10031144476
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 024227291
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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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- JaLC
- NDL
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