| Title |
6xxx Series Al Alloy Sheets with High Formability Produced by Twin-roll Strip Casting and Asymmetric Rolling |
| Authors |
김홍규(Hong Kyu Kim); 조재형(Jae Hyung Cho); 김형욱(Hyoung Wook Kim); 이재철(Jae Chul Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.7.503 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Al alloy; asymmetric rolling; strip casting; mechanical properties; textures; Al-Mg-Si |
| Abstract |
We report on the feasibility of producing 6xxx series Al alloy sheets using a combination of twinroll strip casting and asymmetric rolling. The Al alloy sheets produced in this study exhibited an excellent formability (r=1.2, ㅿr=0.17) and mechanical properties (σTS~260 MPa, ε>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 r and ㅿr 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. |