Suppression of Grain Boundary α Formation by Addition of Silicon in a Near-β Titanium Alloy
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- Nakai Masaaki
- Department of Mechanical Engineering, Faculty of Science and Engineering, Kindai University
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- Niinomi Mitsuo
- Department of Materials Science and Engineering, Faculty of Science and Technology, Meijo University Institute for Materials Research, Tohoku University Department of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University
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- Liu Huihong
- Joining and Welding Research Institute, Osaka University
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- Kitashima Tomonori
- Research Center for Structural Materials, National Institute for Materials Science
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説明
<p>The effect of Si addition on the microstructure and mechanical properties of a near-β titanium alloy Ti-17 with fully lamella microstructure was investigated. It was found that the microstructure of Ti-17 with silicon exhibited the absence of a continuously thick α layer along prior-β grain boundaries (grain boundary α), while the grain boundary α was distinctively formed in Ti-17 without Si. The formation of (Ti, Zr) silicide particles at the prior-β grain interior and its grain boundaries were observed, and the presence of these particles were related to the disappearance of grain boundary α similar to the oxygen scavenging effect of boride particles reported previously. With regard to mechanical properties, Ti-17 with silicon exhibits higher strength and lower ductility compared with Ti-17 without Si. Ductile transgranular fracture morphology was observed even on the fracture surface of Ti-17 with Si after tensile test.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 60 (9), 1749-1754, 2019-07-01
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
- 1390282763134323200
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- NII論文ID
- 130007695406
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 029911944
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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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