Improvement of Microstructure and Mechanical Properties in TiB2-Doped TiAl Alloy by Direct Sheet Casting
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- Hanamura Toshihiro
- Advanced Technology Research Laboratories, Nippon Steel Corporation
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- Hashimoto Keizo
- Advanced Technology Research Laboratories, Nippon Steel Corporation
書誌事項
- タイトル別名
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- Improvement of Microstructure and Mechanical Properties in TiB<SUB>2</SUB>-Doped TiAl Alloy by Direct Sheet Casting
- Improvement of Microstructure and Mecha
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Direct sheet casting of γTiAl with TiB2 particle dispersion was made in order to improve the room temperature tensile ductility of the γTiAl sheets without decreasing their high-temperature strength. As a result, fine equiaxed grain microstructure was formed in the TiAl-1 at%TiB2 sheet with the average grain size of 10 μm, the finest level among the current TiAl ingot specimens in the as-cast bulk condition. The room-temperature ductility was increased to 2.1% with the high-temperature tensile strength kept at the level of 200 MPa in the TiAl-1 at%TiB2 sheet. This improvement of room-temperature ductility was attributable to the fact that the high oxygen content, i.e. 0.58 at%, of this material was not harmful to the tensile ductility when the oxygen existed in the solid solution of the α2 fine lamellar phase or in finely distributed oxide particles, fine enough not to cause brittleness to the matrix. From these findings, it is determined that oxygen was not harmful to the ductility of γTiAl when its microstructure containing oxygen was fine enough.
収録刊行物
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- Materials Transactions, JIM
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Materials Transactions, JIM 39 (7), 724-730, 1998
社団法人 日本金属学会
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詳細情報
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- CRID
- 1390282679223648000
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- NII論文ID
- 130003557061
- 10003803144
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- NII書誌ID
- AA10699969
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- COI
- 1:CAS:528:DyaK1cXls1Gks7w%3D
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- ISSN
- 2432471X
- 09161821
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- NDL書誌ID
- 4525769
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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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- 使用不可