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熱間押出法によるマグネシウム合金のアルミニウム被覆とその材質調査

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Title: 熱間押出法によるマグネシウム合金のアルミニウム被覆とその材質調査
Other Titles: Aluminum Coating on Magnesium-Based Alloy by Hot Extrusion and Its Characteristics
Authors: 徳永, 透子1 Browse this author →KAKEN DB
松浦, 清隆2 Browse this author →KAKEN DB
大野, 宗一3 Browse this author →KAKEN DB
Authors(alt): Tokunaga, Toko1
Matsuura, Kiyotaka2
Ohno, Munekazu3
Keywords: magnesium
aluminum
corrosion resistance
coating
extrusion
mechanical property
Issue Date: Nov-2011
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 75
Issue: 11
Start Page: 633
End Page: 639
Publisher DOI: 10.2320/jinstmet.75.633
Abstract: Although magnesium-based alloys have excellent mechanical properties, their very poor corrosion resistance limits their application. It has been considered that aluminum coating would solve this problem because aluminum has an excellent corrosion resistance. This study proposes a superior coating method based on the hot extrusion process. An aluminum plate set between the magnesium alloy billet and an extrusion die having an inversely angled face was successfully extruded together with the magnesium alloy billet and, as a result, the aluminum coated the extruded magnesium alloy with a uniform thickness. Corrosion tests based on dipping in HCl aqueous solution and potential measurement in NaCl aqueous solution showed that the extruded sample exhibited the same corrosion resistance as the aluminum. A three point bending test at room temperature resulted in fracture after plastic deformation, while at high temperatures between 100 and 300°C plastic deformation without fracture occurred. Notably, the intermetallic layer formed on the boundary between the magnesium alloy substrate and the aluminum coating layer plastically deformed without cracking at 300°C. A tensile test at room temperature resulted in a UTS of about 320 MPa and a plastic elongation of 18%.
Type: article
URI: http://hdl.handle.net/2115/75371
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大野 宗一

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