Fabrication of Sintered Titanium Alloy with Heat-Resistance.
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- Fujimoto Masato
- Graduate School, Kyushu University
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- Nakamura Nobuyuki
- Graduate School of Engineering, Kyushu University
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- Takaki Setsuo
- Graduate School of Engineering, Kyushu University
Bibliographic Information
- Other Title
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- 多元系混合粉の焼結過程および焼結機構 耐熱性を有する焼結Ti合金の製造
- タイネツセイ オ ユウスル ショウケツ Ti ゴウキン ノ セイゾウ
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Abstract
Sintering behavior and microstructures of Ti-(5-10)mass%Al-(1-10)mass%Mo alloy compacts prepared by the technique of mixing Ti, TiAI and Mo powders were investigated by means of optical microscopy. Mechanical properties of the sintered materials were also examined in connection with microstructures.<BR>Addition of (5-10)mass%A1 and (1-10)mass%Mo contributes to sintering densification of titanium compact, since the particle size of TiAI and Mo powders are much finer than that of Ti powder. While, the diffusion of Al and Mo atoms into titanium matrix greatly depend on temperature, so that the powder compacts have to be sintered for 3.6ks at a temperature above 1573K to obtain homogeneous materials in the chemical composition. The structure of compacts is of β (bcc) single-phase at 1573K, but a (hcp) phase precipitates during cooling from the sintering tempereature. When Al content is more than 8mass%, Ti3Al can also precipitate and this makes the sintered materials brittle. On the other hand, when Mo content is more than 6mass%, a phase preferentially precipitates along grain boundary and this results in a decrease of elongation attributed to intergranular fracture. As a result of alloy design, Ti-8mass%Al-4mass%Mo alloy with fine two-phase structure of (α+β) was selected to obtain optimal tensile properties at both temperature of room temperature and 873K.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 44 (12), 1089-1094, 1997
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390001206308353152
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- NII Article ID
- 10002014659
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 4380695
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed