| Project/Area Number |
22560723
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KATAYAMA Seiji 大阪大学, 接合科学研究所, 教授 (10144528)
西本 浩司 (西本 浩二) 阿南工業高等専門学校, その他部局等, 准教授 (40501169)
|
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIMOTO Kouji 阿南工業高等専門学校, 機械工学, 准教授 (40501169)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 溶接 / 接合 / 局所真空 / 高輝度レーザ溶接 / 溶接基礎現象 / 溶融池 / レーザ誘起プルーム / キーホール / ステンレス鋼 / アルミニウム合金 / 局所低真空 / 熔融池 / ステンレス鋼SUS304 / アルミニウム合金A5052 |
|---|
| Research Abstract |
Deep penetration is an important advantage in laser welding. This study was undertaken in order to clarify high-efficiency, deep-penetration welding mechanism including weldability, optical characteristics of laser-induced plume and keyhole behaviors in molten pool with brightness laser under partial, low-vacuum atmosphere. The penetration depths were over 2.5 times as deep as those obtained at 101 kPa. Refraction of incident laser caused by laser-induced plume was drastically reduced corresponding to surrounding pressure of 101 to 0.1 kPa. X-ray high-speed observation revealed that keyhole is unstable but porosity is not formed.
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