| Title |
Microstructure and Mechanical Properties of Twin-Roll Strip-Cast Al-5.5Mg-0.02Ti Alloy Sheet |
| Authors |
천부현(Boo Hyeon Cheon); 한준현(Jun Hyun Han); 김형욱(Hyoung Wook Kim); 이재철(Jae Chul Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2010.48.05.387 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Al-Mg alloy; hot rolling; strength; optical microscopy; twin-roll strip casting |
| 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. |