Browse > Article
http://dx.doi.org/10.3365/KJMM.2012.50.7.503

6xxx Series Al Alloy Sheets with High Formability Produced by Twin-roll Strip Casting and Asymmetric Rolling  

Kim, Hong-Kyu (Department of Material Science and Engineering, Korea University)
Cho, Jae-Hyung (Light Metal Division, Korea Institute of Materials Science)
Kim, Hyoung-Wook (Light Metal 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.50, no.7, 2012 , pp. 503-509 More about this Journal
Abstract
We report on the feasibility of producing 6xxx series Al alloy sheets using a combination of twin-roll strip casting and asymmetric rolling. The Al alloy sheets produced in this study exhibited an excellent formability ($\bar{r}=1.2$, ${\Delta}r=0.17$) and mechanical properties (${\sigma}_{TS}{\sim}260MPa$, ${\varepsilon}>30%$), which cannot be feasibly obtained via the conventional technique based on ingot casting and conventional rolling. The enhanced formability as evaluated in terms of $\bar{r}$ and ${\Delta}r$ was clarified by examining the evolution of textures associated with strip casting and subsequent thermo-mechanical treatments. The evaluation of the formability leads us to conclude that the combined technique based on strip casting and asymmetric rolling is a feasible process for enhancing the formability of Al alloy sheets to a level beyond which the conventional technique can reach.
Keywords
Al alloy; asymmetric rolling; strip casting; mechanical properties; textures; Al-Mg-Si;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 J. H. Han, K. H. Oh, H. K. Seok, Y. H. Chung, and J. C. Lee, J. Kor. Inst. Met. & Mater. 39, 1330 (2001).
2 J. H. Han, J. Y. Suh, K. H. Oh, and J. C. Lee, Acta Mater. 52, 4907 (2004).   DOI   ScienceOn
3 B. A. Riggs, Metall. Mater. Trans. B 4, 1430 (1973).   DOI
4 B. H. Cheon, J. H. Han, H. W. Kim, and J. C. Lee, Korean J. Met. Mater. 48, 387 (2010).   DOI   ScienceOn
5 H. W. Kim, S. S. Jeong, C. Y. Lim, and S. B. Kang, Aluminum alloys, Proceedings of the 11th International conference on Aluminum alloys, ISBN 978-3-527-32367-8, 3, 1707 (2008).
6 H. W. Kim, J. H. Cho, C. Y. Lim and S. B. Kang, Key Engineering Mater. 443, 45 (2010).   DOI
7 H. J. Bunge, Texture Analysis in Materials Science, Butterworth, London (1982).
8 W. C. Liu and J. G. Morris, Scr. Mater. 52, 1320 (2005).
9 W. C. Liu and J. G. Morris, Mater. Sci. Eng. A 402, 215 (2005).   DOI   ScienceOn
10 W. F. Hosford and R. M. Caddell, Metal Forming: Mechanics and Metallurgy, Prentice Hall, Englewood Cliffs, NJ, 274 (1993).
11 P. H. Lequeu and J. J. Jonas, Metall. Mater. Trans. A 19, 105 (1988).   DOI   ScienceOn
12 K. M. Lee, H. G. Kang, M. Y. Huh, and O. Engler, Met. Mater. Int. 16, 851 (2010).   DOI   ScienceOn
13 T. Kamijo, A. Inoue, and H. Fukutomi, Acta Mater. 41, 1245 (1993).   DOI   ScienceOn
14 K. H. Kim and D. N. Lee, Acta Mater. 49, 2583 (2001).   DOI   ScienceOn
15 M. Y. Huh, S. Y. Cho, and O. Engler, Mater. Sci. Eng. A 315, 35 (2001).   DOI   ScienceOn
16 J. H. Han, J. Y. Suh, K. K. Jee, and J. C. Lee, Mater. Sci. Eng. A 477, 107 (2008).   DOI   ScienceOn