2012 Fiscal Year Final Research Report
Improvement of formability and surface quality of aluminum alloy sheets by ultrasound treatment
| Project/Area Number |
22560692
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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 |
Structural/Functional materials
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| Research Institution | Yokohama National University |
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Principal Investigator |
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| Research Collaborator |
OSHIDA Sanichiro Southearstern Louisiana大学, Dept.Chemistry and Physics, 教授
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| Project Period (FY) |
2010 – 2012
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| Keywords | アルミニウム-マグネシウム系合金 / ストレッチャ・ストレインマーク / 表面品質 / 自動車ボディパネル / 電子スペックルパターン干渉法 / ホワイトバンド |
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| Research Abstract |
Weight reduction of gasoline cars is one of the effective means to reduce greenhouse gas such as CO_2 and NO_x. Aluminum alloy sheets, especially Al-Mg alloy sheets, are quite attractive as a body panel material because of the smaller specific gravity. However, there is a problem that diagonal patterns called stretcher-strain marks (SS marks) are produced after plastic deformation, resulting in the diminished surface quality of such panel products. In this study, the formation behavior of SS marks during tensile testing of Al-Mg alloy sheets was aimed at elucidating through a newly developed electronic speckle pattern interferometry (ESPI).
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