Effect of Process State on Crushing Properties of 6061 Aluminum Alloy Profiles for Automobile
WAN Li1,2, LIU Rongchao2, DENG Yunlai1, TANG Jianguo1, ZHANG Yong1
1 School of Materials Science and Engineering, Central South University, Changsha 410083, China 2 Guangdong Fenglu Aluminum Co., Ltd, Foshan 528000, China
Abstract: In this paper, the effect of aging temperature (120 — 220 ℃) on the plastic deformation behavior of 6061 aluminum alloy profile for automobile was studied by means of electronic universal testing machine and scanning electron microscope. The results show that the composite elongation (A50) is about 22% and the uniform elongation (Ag) is about 20% after low temperature aging. The samples show the characteristics of ductile fracture, and there are some large and deep dimples in the fracture morphology. However, aging at 160—180 ℃ increased the strength of the material, while its elongation (A50 and Ag) decreased to less than 9%. The dimple morphology of the fracture surface is small and shallow. With the further increase of aging temperature, the comprehensive elongation of the material gradually rises, while the uniform elongation tends to be stable. The difference between the two kinds of elongation increased significantly. The tensile specimen shows a strong necking phenomenon, and its fracture morphology is dominated by large and deep dimples. Although the high uniform elongation sample and the strong necking sample show good crushing performance, the strong necking sample is better.
万里, 刘荣超, 邓运来, 唐建国, 张勇. 时效工艺对汽车用6061铝合金型材压溃性能的影响[J]. 材料导报, 2021, 35(8): 8099-8102.
WAN Li, LIU Rongchao, DENG Yunlai, TANG Jianguo, ZHANG Yong. Effect of Process State on Crushing Properties of 6061 Aluminum Alloy Profiles for Automobile. Materials Reports, 2021, 35(8): 8099-8102.
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2021, Vol. 35 
