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ISRN Materials Science
Volume 2013 (2013), Article ID 902970, 8 pages
http://dx.doi.org/10.1155/2013/902970
Research Article

Effect of Deformation and Aging on Properties of Al-4.1%Cu-1.4%Mg Aluminum Alloy

1State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, Liaoning 110819, China
2School of Management, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
3Benxi Steel Co. Ltd., Benxi, Liaoning 117021, China

Received 10 July 2013; Accepted 4 August 2013

Academic Editors: Y. X. Gan, V. Ji, and A. O. Neto

Copyright © 2013 Hao Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Deformation scheme and preheat treatment of Al-4.1%Cu-1.4%Mg aluminum alloy are chosen, homogenizing annealing at 430°C for 1.5 h, cooling to 250°C in furnace at a cooling rate of less than 30°C/h and then cooling to room temperature to make Al-4.1%Cu-1.4%Mg aluminum alloy annealed fully. Heat treatment tests of Al-4.1%Cu-1.4%Mg aluminum alloy mainly consisting of rolling and aging were conducted, and the optimum peak of aging mechanism is 190°C/12 h. Through comparison of microstructure and mechanical properties with different deformation rates and aging mechanisms, effect of deformation rates and aging mechanism on properties of Al-4.1%Cu-1.4%Mg aluminum alloy was analyzed, and the optimum double peak of aging mechanism is 135°C/7 h + 185°C/14 h. Orthogonal experiments were carried out to analyze mechanical and electrical properties of tested materials before and after deformation, and the effect of aging mechanism on Al-4.1%Cu-1.4%Mg Al alloy was analyzed, and the optimum regression of aging mechanism is 190°C/12 h + 240°C/40 min + 190°C/12 h. Aging scheme is closely related to corrosion resistance of Al-4.1%Cu-1.4%Mg aluminum alloy, and three different aging schemes can improve the corrosion resistance. The exfoliation corrosion evaluation results show that the aging effect on exfoliation corrosion ability order is RRA two-step aging peak aging.