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

Title
Microstructure and Mechanical Properties of Twin-Roll Strip-Cast Al-5.5Mg-0.02Ti Alloy Sheet
Authors
천부현한준현김형욱이재철
Keywords
Al-Mg alloy; hot rolling; strength; optical microscopy; twin roll strip casting
Issue Date
2010-05
Publisher
대한금속 . 재료학회지; Journal of the Korean Institute of Metals and Materials
Citation
VOL 48, NO 5, 387-393
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 Al8Mg5 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℃ and subsequently annealed at 475℃, 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.
URI
http://pubs.kist.re.kr/handle/201004/41312
ISSN
1738-8228
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KIST Publication > Article
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