INFLUENCE OF THE HOT-ROLLING TECHNIQUE FOR EN AW-8021B ALUMINIUM ALLOY ON THE MICROSTRUCTURAL PROPERTIES OF A COLD-ROLLED FOIL
Keywords:
aluminium alloys, hot rolling, microstructure, EBSD, burst test
Abstract
In the whole manufacturing chain of aluminium products, hot rolling significantly impacts the obtaining of favourable microstructures and desired mechanical properties of final products. The determination of crucial differences between the reverse hot rolling on a single-stand mill and the tandem hot rolling on a tandem-stand mill presented a major challenge. Besides the grain-size distribution in the microstructure’s cross-section, the crystallographic textures of hot-rolled strips were also determined and compared. The alternating band areas of a coarse-grained microstructure and fine-grained microstructure due to reverse hot rolling and, especially, the appearance of extremely fine grains on the surfaces present limitations compared to the tandem hot rolling. For subsequently cold-rolled foils, classical mechanical properties were measured. Besides, the usefulness of EN AW-8021B foils with a thickness of 60 µm for pharmaceutical-packaging applications was tested with a burst test. A minor but important difference of 1 % in the elongation is shown for the convex height increased by 1 mm.
References
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2 R. Nadella, D. G. Eskin, Q. Du, L. Katgerman, Macrosegregation in direct-chill casting of aluminium alloys, Prog. Mater. Sci., 53 (2008) 421–480, doi:10.1016/j.pmatsci.2007.10.001
3 C. J. Vreeman, J. D. Schloz, M. J. M. Krane, Direct chill casting of aluminum alloys: Modeling and experiments on industrial scale ingots, J. Heat Transfer, 124 (2002) 947–953, doi:10.1115/1.1482089
4 T. Haga, K. Tkahashi, M. Ikawaand, H. Watari, Twin roll casting of aluminum alloy strips, J. Mater. Process. Technol., 153–154 (2004) 42–47, doi:10.1016/j.jmatprotec.2004.04.018
5 N. S. Barekar, B. K. Dhindaw, Twin-roll casting of aluminum alloys - An overview, Mater. Manuf. Proc., 29 (2014) 651–661, doi:10.1080/10426914.2014.912307
6 J. G. Lenard, Primer on Flat Rolling: Second Edition, Elsevier, North Holland, 2013, pp. 450, doi:10.1016/C2012-0-06474-5
7 The Aluminum Association, Rolling Aluminum: From the Mine Through the Mill, The Aluminium Association Inc., Vancouver, 2007, pp. 135
8 H. Ahmed, M. A. Wells, D. M. Maijer, M. R. Van Der Winden, Application of a mathematical model to simulate multi-pass hot rolling of aluminum alloy AA5083, Mater. Sci. Forum, 519–521 (2006) 1473–1478, doi:10.4028/www.scientific.net/MSF.519-521.1473
9 M. A. Wells, D. J. Lloyd, I. V. Samarasekera, J. K. Brimacombe, E. B. Hawbolt, Modeling the microstructural changes during hot tandem rolling of AA5XXX aluminum alloys: Part I. Microstructural evolution, Metall. Mater. Trans. B, 29 (1998) 611–620, doi:10.1007/s11663-998-0096-9
10 X. Duan, T. Sheppard, Influence of forming parameters on the final subgrain size during hot rolling of aluminium alloys, J. Mater. Proc. Tech., 130–131 (2002) 245–249, doi:10.1016/S0924-0136(02)00811-7
11 K. Venkateswarlu, B. S. Murty, M. Chakraborty, Effect of hot rolling and heat treatment of Al-5Ti-1B master alloy on the grain refining efficiency of aluminum, Mater. Sci. Eng. A, 301 (2001) 180–186, doi:10.1016/S0921-5093(00)01422-2
12 J. Butt, H. Mebrahtu, H. Shirvani, Microstructure and mechanical properties of dissimilar pure copper foil/1050 aluminium composites made with composite metal foil manufacturing, J. Mater. Process. Technol., 238 (2016) 96–107, doi:10.1016/j.jmatprotec.2016.07.014
13 A. Can, H. Arikan, K. Çỳnar, Analysis of twin-roll casting AA8079 alloy 6.35-μm foil rolling process, Mater. Tehnol., 50 (2016) 861–868, doi:10.17222/mit.2015.134
14 M. Singh, A. K. Choubey, C. Sasikumar, Formability Analysis of Aluminium Alloy by Erichsen Cupping Test Method, Mater. Today: Proc., 4 (2017) 805–810, doi:10.1016/j.matpr.2017.01.089
15 J. Kraner, P. Fajfar, H. Palkowski, G. Kugler, M. Godec, and I. Paulin, Microstructure and texture evolution with relation to mechanical properties of compared symmetrically and asymmetrically cold rolled aluminum alloy, Metals, 10 (2020) 156, doi:10.3390/met10020156
16 S. Das, S. Meena, R. Sarvesha, Hot and cold rolling behavior of AA5083 aluminium alloy, Miner., Met. Mater. Series, (2019) 217–224, doi:10.1007/978-3-030-05864-7_29
17 J. Kraner, T. Smolar, D. Volsak, P. Cvahte, M. Godec, I. Paulin, A review of asymmetric rolling, Mater. Tehnol., 54 (2020) 731–743, doi:10.17222/mit.2020.158
18 J. Hirsch, T. Al-Samman, Superior light metals by texture engineering: Optimized aluminum and magnesium alloys for automotive applications, Acta Mater., 61 (2013) 818–843, doi:10.1016/j.actamat.2012.10.044
19 J.-M. Feppon, B. Chenal, Grain size and mechanical properties of aluminium thin foils used in packaging applications, Matériaux Tech., 90 (2002) 59–65, doi:10.1051/mattech/200290050059
20 H. Liu, Y. Shen, J. Ma, P. Zheng, L. Zhang, Grain Size Dependence of Uniform Elongation in Single-Phase FCC/BCC Metals, J. Mater. Eng. Perform., 25 (2016) 3599–3605, doi:10.1007/s11665-016-2245-7
21 J. Kraner, P. Fajfar, H. Palkowski, M. Godec, I. Paulin, Asymmetric cold rolling of an aa 5xxx aluminium alloy, Mater. Tehnol., 54 (2020) 575–582, doi:10.17222/mit.2020.097
22 M. Lederer, V. Gröger, G. Khatibi, B. Weiss, Size dependency of mechanical properties of high purity aluminium foils, Mater. Sci. Eng. A, 527 (2010) 590–599, doi:10.1016/j.msea.2009.08.016
23 J. Zhang, F. Pan, R. Zuo, C. Bai, The low temperature precipitation in commercial-purity aluminium sheets for foils, J. Mater. Process. Technol., 206 (2008) 382–387, doi:10.1016/j.jmatprotec.2007.12.042
Published
2021-12-10
How to Cite
1.
Kraner J, Smolar T, Volšak D, Lažeta M, Skrbinek R, Fridrih D, Cvahte P, Godec M, Paulin I. INFLUENCE OF THE HOT-ROLLING TECHNIQUE FOR EN AW-8021B ALUMINIUM ALLOY ON THE MICROSTRUCTURAL PROPERTIES OF A COLD-ROLLED FOIL. MatTech [Internet]. 2021Dec.10 [cited 2026Jul.16];55(6):773–779. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/216
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