过时效与添加Zr对Al-Zn-Mg合金耐腐蚀性能影响的对比

doi:10.11896/cldb.18110015

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Abstract Taking Al-Zn-Mg alloy as research object, a comparative study about the effect of over-aging treatment and adding Zr on the corrosion resis-tance of Al-Zn-Mg alloy was carried out by means of slow strain rate test(SSRT), intergranular corrosion(ICG) and exfoliation corrosion tests (EXCO). In light of the results, over-aging treatment (T76) was superior to peak-aging treatment (T6) because of its significant effect in enhancing the stress corrosion cracking(SCC), intergranular corrosion and exfoliation corrosion resistance of Al-Zn-Mg alloy. A remarkable improvement in the strength of Al-Zn-Mg alloy could be observed by adding 0.15% Zr. In addition, amelioration of corrosion resistance of the alloy in different extents was achieved, in which the stress corrosion cracking and intergranular corrosion resistance showed the most obvious amelioration. However, adding Zr was less effective in improving exfoliation corrosion resistance of the alloy than over-aging treatment. The mechanism for the influence of over-aging treatment and adding Zr on the corrosion resistance of the alloy was analyzed by means of scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). It was found that over-aging treatment made the grain boundary precipitates (GBPs) of the alloy turn coarse and intermittently distributed, and widened the precipitate free zone (PFZ). While the addition of Zr inhibited the recrystallization of the alloy, and the reduction of large-angle grain boundary fraction contributed to enhancing the corrosion resistance of the alloy.

Key words： Al-Zn-Mg alloy over aged Zr element corrosion resistance microstructure grain boundary

Published: 03 January 2020

CLC number:

TG146.2

About author:: Meng Qu is a master candidate in the School of Mate-rials Science and Engineering, Central South University. The research mainly focuses on the performance detection and process development of vehicle high-performance aluminum alloy. He has participated in one National Natural Science Foundation Project and three school-enterprise cooperation projects;Lingying Ye, an associate professor and doctoral supervisor of Central South University, mainly engaged in the research of high-performance aluminum, magne-sium alloy preparation, grain refinement, high-tempe-rature deformation behavior and corresponding mechanism. He has presided more than one National Natural Science Foundation Youth Fund Project, three National Defense Science And Technology 863 Project, one sub-project contract of National 973 Project and three school-enterprise cooperation projects. He has participated in 2 Pre-research Projects of General Assembly, 2 National “973” Projects, 3 International Scientific and Technological Cooperation Projects, and 1 National Natural Scie-nce Foundation Project. He has applied 7 national invention patents and published 30 papers in various academic journals, including 9 international important journals, 2 foreign authoritative journals, 2 international conference papers, 12 SCI papers and 28 EI papers.

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	QU Meng
	TANG Jianguo
	YE Lingying
	LI Chengbo
	LI Jianxiang
	ZHOU Wang
	DENG Yunlai

Cite this article:

QU Meng,TANG Jianguo,YE Lingying, et al. Comparative Study on the Effect of Over-aging and Addition of Zr on the Corrosion Resistance of Al-Zn-Mg Alloy[J]. Materials Reports, 2020, 34(2): 2083-2087.

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http://www.mater-rep.com/EN/10.11896/cldb.18110015 OR http://www.mater-rep.com/EN/Y2020/V34/I2/2083

Williams J C, Jr E A S. Acta Materialia, 2003, 51(19), 5775.2 Heinz A, Haszler A, Keidel C, et al. Materials Science and Engineering: A, 2000, 280(1), 102.3 Hirsch J, Al-Samman T. Acta Materialia, 2013, 61(3), 818.4 Chen X M,Song R G. Corrosion Science and Protection Technology, 2010, 22(2),120(in Chinese).陈小明,宋仁国. 腐蚀科学与防护技术, 2010, 22(2), 120.5 Huang L P,Chen K H,Li S,et al. Rare Metal Materials and Engineering, 2007(9), 1628(in Chinese).黄兰萍,陈康华,李松,等. 稀有金属材料与工程, 2007(9),1628.6 Takano N. Materials Science & Engineering A, 2008, 483(1), 336.7 Rao A C U, Vasu V, Govindaraju M, et al. Transactions of Nonferrous Metals Society of China, 2016, 26(6), 1447.8 Knight S P, Birbilis N, Muddle B C, et al. Corrosion Science, 2010, 52(12), 4073.9 Chen S, Chen K, Dong P, et al. Journal of Alloys & Compounds, 2013, 581(18),705.10 Song F X,Zhang X M,Liu S D,et al. The Chinese Journal of Nonferrous Metals, 2013(3), 645(in Chinese).宋丰轩,张新明,刘胜胆,等. 中国有色金属学报, 2013(3), 645.11 Xiao Y P, Pan Q L, Li W B, et al. Materials & Design, 2011, 32, 2149.12 Reda Y, Abdel-Karim R, Elmahallawi I. Materials Science & Engineering A, 2008, 485(1-2), 468.13 Yang L H,Liu Z Y,Wang M X,et al. Heat Treatment of Metals, 2018(2), 35(in Chinese).杨丽辉,刘志勇,王明星,等. 金属热处理, 2018(2), 35.14 Kannan M B, Raja V S. Engineering Fracture Mechanics, 2010, 77, 249.15 Chen K H, Fang H C, Zhang Z, et al. Materials Science & Engineering A, 2008, 497(1-2), 426.16 Fu G,Deng Y L,Wang Y F,et al. The Chinese Journal of Nonferrous Me-tals, 2015(10), 2632(in Chinese).付高,邓运来,王亚风,等. 中国有色金属学报, 2015(10), 2632.17 Peng G, Chen K, Fang H, et al. Materials & Design, 2012, 36, 279.18 Sinyavskii V S, Ulanova V V, Kalinin V D. Protection of Metals, 2004, 40(5), 481.19 Chen M, Deng Y, et al. Materials Characterization, 2019, 148, 259.20 Robinson M J. Corrosion Science, 1983, 23(8), 887.21 Lu X, Han X, Du Z, et al. Materials Characterization, 2018, 135, 167.