Synergistic Balance of Strength and Corrosion Resistance in Al-Mg-Er Alloys

doi:10.1007/s40195-020-01007-1

金属学报英文版 ›› 2020, Vol. 33 ›› Issue (5): 659-670.DOI: 10.1007/s40195-020-01007-1

收稿日期:2019-10-11 修回日期:2019-11-15 出版日期:2020-05-10 发布日期:2020-05-25

Synergistic Balance of Strength and Corrosion Resistance in Al-Mg-Er Alloys

Haifei Zhou¹, Zhouhai Qian¹, Mengcheng Zhou², Xuebing Liu², Yong Li², Xinfang Zhang²()

¹Zhejing Electric Power Corporation Research Institute, Hangzhou 310014, China
²State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received:2019-10-11 Revised:2019-11-15 Online:2020-05-10 Published:2020-05-25
Contact: Xinfang Zhang

摘要/Abstract

Abstract:

High-strength, corrosion-resistant, and lightweight Al-Mg alloys perform an important function in harsh coastal service environments. Corrosion resistance is generally inversely correlated with strength; hence, it is difficult to simultaneously optimize both. In this study, a low-magnesium Er-containing Al-based alloy that is stronger and more corrosion resistant than Al-based alloys have been reported. The alloy contains Er, and the precipitation of Al₃Er within a face-centered cubic matrix is obtained by a series of smelting-casting, heat treatment, and rolling processes. It is presumed that the strengthening phase of Al₃Er pinning dislocations improves alloy strength. It also increases the recrystallization temperature of cold-rolled matrix and induces the distribution of small-angle grain boundaries, thus allowing the alloy to achieve excellent environmental corrosion resistance. As a result, strength and corrosion resistance are simultaneously improved.

Key words: Al-Mg alloy, Al₃Er, Strength, Corrosion resistance, Er

. [J]. 金属学报英文版, 2020, 33(5): 659-670.

Haifei Zhou, Zhouhai Qian, Mengcheng Zhou, Xuebing Liu, Yong Li, Xinfang Zhang. Synergistic Balance of Strength and Corrosion Resistance in Al-Mg-Er Alloys[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(5): 659-670.

图/表 15

Table 1 Composition (wt%) of Al-Mg-Er alloys tested in this study

Fig. 1 Typical back-scattered electron images: a 0Er, b 0.20Er, c 0.56Er at 320 °C; d 0Er, e 0.20Er, f 0.56Er at 400 °C

Fig. 2 EDS element mapping analysis of 0.56Er alloys showing Er enrichment of intermetallic particles

Fig. 3 Images of intergranular corrosion tests: a 0Er, b 0.20Er, c 0.56Er at 320 °C; d 0Er, e 0.20Er, f 0.56Er at 400 °C

Fig. 4 Effect of Er content on average maximum corrosion depth in samples treated at 320 and 400 °C

Fig. 5 Images of acid salt spray solution tests in samples treated at 400 °C: a 0Er, b 0.2Er, c 0.56Er

Fig. 6 Effect of Er content on corrosion area and area density in sample treated at 400 °C

Fig. 7 a Potentiodynamic polarization curves of Al-2.6 Mg-xEr alloys in samples treated at b 400 °C, c 320 °C; d effect of Er on corrosion of Al-2.6 Mg alloy measured in terms of corrosion current density from Tafel extrapolation

Fig. 8 Images of electrochemical corrosion tests: a 0Er, b 0.20Er, c 0.56Er at 320 °C; d 0Er, e 0.20Er, f 0.56Er at 400 °C

Fig. 9 Mass loss per unit area following electrochemical corrosion tests 20 min and subsequent cleaning of corrosion products

Fig. 10 Effect of Er content on tensile strength of aluminum alloy treated at 400 °C

Fig. 11 Simultaneous effects of Er on corrosion and tensile strength of Al-2.6 Mg alloy

Fig. 12 Bright-filled TEM image of alloys annealed at 320 °C: a 0Er, b 0.56Er

Fig. 13 Bright-filled TEM images of alloys annealed at 400 °C: a 0Er, b, c 0.56Er

Fig. 14 Samples in coastal substations a before test (0 year), b after 1 year, c after 2 years

参考文献 32

[1]	W. Huo, J. Hu, H. Cao, Y. Du, W. Zhang, Y. Zhang, J. Alloys Compd. 781, 680 (2019)
[2]	R.H. Jones, D.R. Baer, M.J. Danielson, J.S. Vetrano , Metall. Mater. Trans. A 32, 1699 (2001)
[3]	J.A. Lyndon, R.K. Gupta, M.A. Gibson, N. Birbilis , Corros. Sci. 70, 290 (2013)
[4]	S. Seetharaman, C. Blawert, B.M. Ng, J. Alloys Compd. 648, 759 (2015)
[5]	Z.R. Nie, H. Huang, K.Y. Gao, B.L. Li, W. Wang, Z.Y. Chen, L. Rong, S.P. Wen, H.M. Li, T.Y. Zuo , Mater. Sci. Forum 706, 329 (2012)
[6]	F. Rosalbino, E. Angelini, S. De Negri, A. Saccone, S. Delfino , Intermetallics 11, 435 (2003)
[7]	Z. Nie, J. Fu, G. Xu, T.Z.J. Yang , Mater. Sci. Forum 396, 1731 (2002)
[8]	C.H. Cui, K.Y. Gao, Z.R. Nie, S.P. Wen, H. Huang , Corros. Prot. 32, 94 (2011)
[9]	Y. Wang, Q.L. Pan, Y.F. Song, C. Li, Z.F. Li, Q. Chen, Z.M. Yin , Trans. Nonferrous Metals Soc. China 23, 3235 (2013)
[10]	Y. Riddle, T. Sanders , Metall. Mater. Trans. A 35, 341 (2004)
[11]	Y. Ding, K. Gao, S. Guo, S. Wen, H. Huang, X. Wu, Z. Nie, D. Zhou , Mater. Charact. 147, 262 (2019)
[12]	Y.F. Shen, R.G. Guan, Z.Y. Zhao, R.D.K. Misra , Acta Mater. 100, 247 (2015)
[13]	Y. Zhang, Z. Yin, J. Zhang, Q. Pan, Z. Peng , Rare Metal Mater. Eng. 31, 167 (2002)
[14]	Y. Wang, R.K. Gupta, N.L. Sukiman, R. Zhang, C.H.J. Davies, N. Birbilis , Corros. Sci. 73, 181 (2013)
[15]	V. Ocenasek, M. Slamova , Mater. Charact. 47, 157 (2001)
[16]	J.D. Lin, D.N. Seidman, D.C. Dunand , Mater. Sci. Eng. A 754, 447 (2019)
[17]	C.B. Fuller, A.R. Krause, D.C. Dunand, D.N. Seidman , Mater. Sci. Eng. A 338, 8 (2002)
[18]	YuA Filatov, V.I. Yelagin, V.V. Zakahrov , Mater. Sci. Eng. A 280, 97 (2000)
[19]	H. Li, H. Wang, X. Liang, Y. Wang, H. Liu, J. Mater. Eng. Perform. 21, 83 (2012)
[20]	S.P. Wen, Z.B. Xing, H. Huang, B.L. Li, W. Wang, Z.R. Nie , Mater. Sci. Eng. A 516, 42 (2009)
[21]	S.P. Lin, Z.R. Nie, H. Huang, B.L. Li , Mater. Des. 31, 1607 (2010)
[22]	GB/T 7998-2005, National Standard of China, Test Method for Inter-granular Corrosion of Aluminum Alloys
[23]	GB/T 19764-2005, National Standard of China, Corrosion of Metals and Alloys-Alternate Immersion Test in Salt Solution
[24]	GB/T 18590-2001, National Standard of China, Corrosion of Metals and Alloys-Evaluation of Pitting Corrosion
[25]	J.Y. Gao, X.B. Liu, H.F. Zhou, X.F. Zhang , Acta Metall. Sin. (Engl. Lett.) 31, 1233 (2018)
[26]	W.J. Lv, B.L. Li, P. Qi, Z.R. Nie , Mater. Sci. Forum 898, 35 (2017)
[27]	X.L. Wu, Z.R. Nie, S.P. Wen, K.Y. Gao, H. Huang , Mater. Sci. Forum 877, 211 (2017)
[28]	A.J. Davenport, Y. Yuan, R. Ambat , Mater. Sci. Forum 641, 519 (2006)
[29]	L. Tan, T.R. Allen , Corros. Sci. 52, 548 (2010)
[30]	K.L. Kendig, D.B. Miracle , Acta Mater. 50, 4165 (2002)
[31]	S.X. Lin, X.R. Chu, Z.M. Yue , Acta Metall. Sin. (Engl. Lett.) 31, 1281 (2018)
[32]	N. Thangapandian, S.B. Prabu, K.A. Padmanabhan , Acta Metall. Sin. (Engl. Lett.) 32, 835 (2019)

Synergistic Balance of Strength and Corrosion Resistance in Al-Mg-Er Alloys

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 15

参考文献 32

相关文章 0

编辑推荐

Metrics

本文评价