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http://dx.doi.org/10.3365/KJMM.2010.48.05.387

Microstructure and Mechanical Properties of Twin-Roll Strip-Cast Al-5.5Mg-0.02Ti Alloy Sheet  

Cheon, Boo-Hyeon (Department of Material Science and Engineering, Korea University)
Han, Jun-Hyun (Division of Materials Science and Engineering, Korea Institute of Science and Technology)
Kim, Hyoung-Wook (Structural Materials Division, Korea Institute of Materials Science)
Lee, Jae-Chul (Department of Material Science and Engineering, Korea University)
Publication Information
Korean Journal of Metals and Materials / v.48, no.5, 2010 , pp. 387-393 More about this Journal
Abstract
High-strength aluminum alloy sheets with high magnesium contents were fabricated by a strip caster equipped with an asymmetric nozzle, which has been proven to be effective for reducing surface defects and internal segregation. 4 mm thick as-cast sheets consisting of fine dendrites and minor $Al_{8}Mg_{5}$ segregation were hot-rolled successfully to 1 mm sheets and subsequently annealed at various temperatures. The sheet revealed the tensile strength and elongation of 306 MPa and 34%, respectively, when it was rolled at 250${^{\circ}C}$ and subsequently annealed at 475${^{\circ}C}$, which exhibits the feasibility of the practical application for autobodies. The observed mechanical properties were explained on the basis of the microstructural characteristics of the alloy sheets.
Keywords
Al-Mg alloy; hot rolling; strength; optical microscopy; twin-roll strip casting;
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Times Cited By SCOPUS : 3
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