时效应力对7A04铝合金二级时效力学及剥落腐蚀性能的影响

doi:10.11896/cldb.18040225

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Abstract Effects of aging stress on the mechanical properties and exfoliation corrosion resistance of 7A04 aluminum alloy with two-stage aging were investigated by mechanical properties test, XRD analysis, tensile fracture surface analysis and exfoliation corrosion evaluation. The results indicated that the strength and hardness of 7A04 aluminum alloy increased with the aging stress of 100~300 MPa. Compared with no stress-aging condition, the tensile strength, yield strength and hardness of 7A04 aluminum alloy reached 652.3 MPa, 588.5 MPa and 178HB after aged with stress of 200 MPa, increased by 4.47%, 3.94% and 5.95% respectively, but the change of the elongation is insignificant. Additionally, with the increase of aging stress, the content of MgZn₂ precipitates in the microstructure of the alloy increased, and the fracture mode of the alloy also changed. The suitable aging stress can reduce the exfoliation corrosion sensitivity of 7A04 aluminum alloy, and the alloy has the best corrosion resistance with the aging stress of 200 MPa, which reached the level of EA.

Key words： 7A04 aluminum alloy aging stress two-stage aging exfoliation corrosion resistance

Published: 31 May 2019

CLC number:	O614.53+2
	TQ567.8

Fund:This work was financially supported by the National Key Technology R & D Program of China (2015BAG12B01).

About author:: Hu Lireceived his M.S. degree in June 2018 from Southwest Jiaotong University in engineering. From September 2015 to April 2018, he learned at School of Materials Science and Engineering, focusing on the research of stress aging heat treatment of high strength aluminum alloy.Junwen Zhaoreceived his Ph.D. degree in material processing engineering from Huazhong University of Science and Technology in 2009. He is a member of China Metal Society and Sichuan Foundry Society, and he is currently an associate professor in School of Materials Science and Engineering. His research interests are alloys and composite materials, focusing on metal semi-solid processing technology.

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	LI Hu
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Cite this article:

LI Hu,ZHAO Junwen,WANG Chaoqun, et al. Effects of Aging Stress on the Mechanical Properties and Exfoliation CorrosionResistance of 7A04 Aluminum Alloy with Two-stage Aging[J]. Materials Reports, 2019, 33(12): 2025-2029.

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http://www.mater-rep.com/EN/10.11896/cldb.18040225 OR http://www.mater-rep.com/EN/Y2019/V33/I12/2025

1 Williams J C, Jr E A S. Acta Materialia, 2003, 51(19), 5775.
2 Rometsch P A, Zhang Y, Knight S. Transactions of Nonferrous Metals Society of China, 2014, 24(7), 2003.
3 Wu H P, Wang Z X, Ma Y L, et al. Journal of Chongqing University of Technology (Natural Science), 2017, 31(4), 59 (in Chinese).
吴海鹏, 王正曦, 麻彦龙, 等. 重庆理工大学学报(自然科学), 2017, 31(4), 59.
4 Heinz A, Haszler A, Keidel C, et al. Materials Science & Engineering A, 2000, 280(1), 102.
5 Pankade S B, Khedekar D S, Gogte C L. Procedia Manufacturing, 2018, 20, 53.
6 Cai B, Adams B L, Nelson T W. Acta Materialia, 2007, 55(5), 1543.
7 Peng F F, Kang F, Shu D Y, et al. Journal of Chongqing University of Technology (Natural Science), 2014, 28(10), 56 (in Chinese).
彭菲菲, 康凤, 舒大禹, 等. 重庆理工大学学报(自然科学), 2014, 28(10), 56.
8 Xu J Y, Pu J R. Hot Working Technology, 2015(8),212 (in Chinese).
徐君燕, 卜建荣.热加工工艺, 2015(8), 212.
9 Liu Y, Jiang D, Li B, et al. Materials & Design, 2014, 57(5), 79.
10Lin Y C, Jiang Y Q, Zhang X C, et al. Materials and Design, 2014, 61, 228.
11Cao S F, Pan Q L, Liu X Y, et al. The Chinese Journal of Nonferrous Metals, 2010, 20(8), 1513 (in Chinese).
曹素芳, 潘清林, 刘晓艳, 等.中国有色金属学报, 2010, 20(8), 1513.
12Guo W, Guo J Y, Wang J D, et al.Materials Science and Engineering A, 2015, 634, 167.
13Lin Y C, Jiang Y Q, Xia Y C, et al. Materials Science & Engineering A, 2014, 605, 192.
14Lin Y C, Jiang Y Q, Chen X M, et al. Materials Science and Enginee-ring A, 2013, 588, 3.
15Sha G, Cerezo A.Acta Materialia, 2004, 52(15), 4503.
16Du Z W, Sun Z M, Shao B L, et al. Materials Characterization, 2006, 56(2), 121.
17Xu T D, Li Q F, Yang S L. Journal of Iron and Steel Research, 2001, 13(4), 28 (in Chinese).
徐庭栋, 李庆芬, 杨尚林.钢铁研究学报, 2001, 13(4), 28.
18Najjar D, Magnin T, Warner T J.Materials Science and Engineering A, 1997, 238(2), 293.