| Project/Area Number |
17K06814
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Composite materials/Surface and interface engineering
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| Research Institution | Utsunomiya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山本 篤史郎 宇都宮大学, 工学部, 准教授 (40334049)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 摩擦撹拌接合 / 摩擦撹拌拡散接合 / 箔 / アルミニウム / チタン / EBSD解析 / 異材接合 / アルミニウム合金 / 銅 / ジルコニウム / 鉄 / 表面粗さ / 接合 / 摩擦攪拌接合 |
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| Outline of Final Research Achievements |
Friction stir diffusion bonding (FSDB) has been applied to lap foil joints of A5052, A4045 or A1050 aluminum alloy on top of commercial purity (CP) titanium. FSDB of the foils was successfully performed through stirring only the upper aluminum foil by the air spindle with an extremely-high rotation speed of 105,000 rpm. In the spot FSDB, bonding strength varied with a distance from the tool center. In order to investigate the stir zone and the stirring mechanism of the upper foil, EBSD analysis was performed on the cross-section of the joint. As a result, two characteristic regions were observed, the former has fine grains while the latter has coarse. The distribution of these regions corresponded to the joint strength distribution.
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| Academic Significance and Societal Importance of the Research Achievements |
工業用純チタン箔の上にA5052, A4045およびA1050アルミニウム合金箔を重ね、回転するツールを箔材に押付け材料を加熱するとともに撹拌する摩擦撹拌拡散接合(FSDB)を行った。通例板材に適用されるFSDBを0.1mm厚の箔材に適用し、超高速回転するエアスピンドルを用いることにより首尾よく接合された。これまで不明であった撹拌領域と接合機構を接合断面のEBSD結晶方位解析により明らかにした。また、高い接合強度が大きなひずみに対応する微細粒領域で得られることが分かった。
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