Effect of Cr and Mn on Crushing Properties of Aluminum Alloy Profiles for Automobile
WAN Li1,2,*, ZHANG Qi1, ZHANG Yong1, TANG Jianguo1, DENG Yunlai1
1 School of Materials Science and Engineering, Central South University, Changsha 410083, China 2 Guangdong Fenglu Aluminum Co., Ltd., Foshan 528000, Guangdong, China
Abstract: In this work, the effect of Cr and Mn content on the collapsibility of aluminum alloy profiles for automobile was studied by using the plastic deformation behavior of profiles during full section compression. The results show that the addition of Cr and Mn can effectively inhibit the recrystallization and grain growth during extrusion. When the content of Cr and Mn is 0.09%, the profile is completely coarse-grained; as the content of Cr and Mn is 0.23%, there are only coarse grain layers with a thickness of 400 μm; while the content of Cr and Mn is 0.51%, the whole section of the profile is uniform and has fine fibrous structure. In the later stage of deformation, the non-uniform plastic deformation behavior cha-racterized by necking is obvious for profiles with fine grain structure. This stage produces about 4% (A50) elongation, which greatly improves the local deformation ability of profiles. The crushing energy of fine-grained profiles (10.6 kJ) increases, compared with that of coarse-grained profiles (5.5 kJ). Evidently, the fine grains show a better energy absorption effect.
1 Wan Y H, Wang G, Liu Z W, et al. Materials for Mechanical Enginee-ring, 2012, 36(7), 67(in Chinese). 万银辉, 王冠, 刘志文, 等. 机械工程材料, 2012, 36(7), 67. 2 Gao G J, Li Y, Li J D, et al. Transactions of Materials and Heat Treatment, 2016, 37(6), 76(in Chinese). 高冠军, 李勇, 李家栋, 等. 材料热处理学报, 2016, 37(6), 76. 3 Ye T, Wang G, Yao Z Q, et al. The Chinese Journal of Nonferrous Metals, 2014, 24(4), 878(in Chinese). 叶拓, 王冠, 姚再起, 等. 中国有色金属学报, 2014, 24(4), 878. 4 Zhang W P, Li H H, Hu Z L, et al. Materials Reports A: Review Papers, 2017, 31(7), 85(in Chinese). 张文沛, 李欢欢, 胡志力, 等, 材料导报:综述篇, 2017, 31(7), 85. 5 Wan X M, Xu X F, Xu Z M, et al. Chinese Journal of Automotive Engineering, 2013, 3(1), 19(in Chinese). 万鑫铭, 徐小飞, 徐中明, 等. 汽车工程学报, 2013, 3(1), 19. 6 Mi L, Wei X K, Wan X M, et al. Journal of Chongqing University of Technology (Natural Science), 2012, 26(6), 1(in Chinese). 米林, 魏显坤, 万鑫铭, 等. 重庆理工大学学报(自然科学), 2012, 26(6), 1. 7 Osterreicher J, Schiffl A, Falkinger G, et al. In: IOP Conference Series Materials Science and Engine. India, 2016, pp. 012028. 8 Wan L, Liu R C, Zhang Y, et al. Materials Reports, 2021, 35(8), 99(in Chinese). 万里, 刘荣超, 张勇, 等, 材料导报, 2021, 35(8), 99. 9 Costa J, Peixinho N.Journal of Engineering and Technology, 2015. https://www. researchgate.net/publication/278303580. 10 Yan L, Fan J K. Materials Design, 2016, 110(11), 592. 11 Ikawa S, Asano M, Kuroda M, et al. Materials Science and Engineering A, 2011, 528(12), 4050. 12 Nakanishi H, Asano M, Yoshida H. Journal of Japan Institute of Light Metals, 2014, 64(6), 235.
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2022, Vol. 36 
