| Project/Area Number |
23560865
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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 |
Material processing/treatments
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| Research Institution | Okinawa National College of Technology (2012-2014)
Osaka University (2011) |
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Principal Investigator |
TSUMURA Takuya 沖縄工業高等専門学校, 機械システム工学科, 准教授 (00283812)
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| Research Collaborator |
NAKATA Kazuhiro
GUSHI Takashi
SHINYA Nobuhide
NASHIRO Yuki
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 母材添加元素 / 三元共晶融解 / 金属間化合物 / 引張せん断強度 / 摩擦攪拌点接合 / 異種材料 / 難燃性マグネシウム合金 / 材料加工・処理 / 溶接・接合 / 異種金属材料 / 輸送機器 |
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| Outline of Final Research Achievements |
Joints for metallographic observation and strength test were obtained by Friction Stir Spot Welding on certain conditions. Cross sections of the joint were observed, tensile shear test and cross tension test of the joint were evaluated, and fractured surface on the steel sheets were observed after the strength test.
Tensile shear strength of the non-combustible magnesium alloy and hot dip galvanizing steel sheet joint was higher than any other joints. Fracture was start at periphery of the joiningn area, and was progressed along with aluminum-iron intermetallic compound layer. Ternary eutectic of magnesium, aluminum and zinc was producted by the frictional heat, and the eutectic melt was discharged out of the joint interface, aluminum-iron intermetallic compound layer was formed. This compound layer help the tight-jointed.
It is made clear that change of tool shape and fixing plate produce an increased potential for improvement of tensile shear and cross tenslle strength.
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