1990 Fiscal Year Final Research Report Summary
Processing and Character Evaluation of Ultrafine Grained Aluminum Alloys Containing Ceramic Particles
| Project/Area Number |
01550061
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
機械材料工学
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
OTSUKA Masahisa Shibaura Institute of Technology, Department of Metallurgical Engineering, Professor., 工学部 (20013732)
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| Co-Investigator(Kenkyū-buntansha) |
YOKOTA Takeo Shibaura Institute of Technology, Department of Metallurgical Engineering, Lectu, 工学部, 講師 (80052869)
KANEKO Junichi Nihon University, Department of Mechanical Engineering, Professor., 生産工学部, 教授 (00120410)
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| Project Period (FY) |
1989 – 1990
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| Keywords | Atomizing / Rapid Solidification / Powder Metallurgy / Aluminum / Aluminum-Iron Alloy / Creep / Dispersion Strengthening / Wear Resistance |
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| Research Abstract |
The purpose of the present study is to investigate the solid-state weldability of aluminum-based RS/PM alloys and to assess the applicability of these alloys as advanced structural materials. As a first step, we try here to perform friction welding (FRW) of RS/PM aluminum alloys containing 4 or 8 mass% iron. Although detailed experimental studies have been performed on the FRW of conventional aluminum alloys, almost no light has been shed upon the FRW on such PM aluminum alloys. The results are summarized as follows.
(1) The friction welding can be applied to RS/PM aluminum alloys Alー4Fe and Al-8Fe, although the ductility of the welded joint is insufficient at present.
(2) Under almost all conditions employed, the FRW provides a joint with the tensile strength comparable with that of base metal both at room temperature and at elevated temperatures.
(3) The lack of ductility is principally ascribed to the formation of an intermetallic layer especially in the outer region of the interface. Partial melting of the matrix may possibly play an important role in the above process.
(4) Even at the weld interface, the matrix does not melt as a whole in the welding process.
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