Abstract
The effect of various retrogression and re-aging (RRA) treatments on mechanical properties and corrosion behavior of a new type Al–Zn–Mg–Cu–Er–Zr alloy was investigated by microhardness testing, tensile testing, intergranular corrosion (IGC) and exfoliation corrosion (EXCO) testing. The results show that the RRA treatment can effectively improve the IGC and EXCO resistance with less strength sacrificing because the grain interior precipitates and the grain boundary precipitates are similar to that of T6 temper and T73 temper. Meanwhile, as the microhardness of the retrogressed alloy reaches the peak value during the retrogression at 170 °C, the corresponding RRA-treated alloy possesses the better strength, but the corrosion resistance is poor in comparison with that of the retrogression at 190 °C. The optimal combination of strength, IGC and EXCO resistance is obtained after retrogression at 180 °C for 60 min. Moreover, for different heat treatment tempers, the corresponding microstructural evolution of the precipitates including Al3(Er, Zr) particles was also discussed in detail.
Similar content being viewed by others
References
Heinz A, Haszler A, Keidel C, Moldenhauer S, Benedictus R, Miller WS. Recent development in aluminium alloys for aerospace applications. Mater Sci Eng A. 2000;280(1):102.
Williams JC, Starke EA. Progress in structural materials for aerospace systems. Acta Mater. 2003;51(19):5775.
Dursun T, Soutis C. Recent developments in advanced aircraft aluminium alloys. Mater Des. 2014;56(4):862.
Song FX, Zhang XM, Liu SD, Tan Q, Li DF. Exfoliation corrosion behavior of 7050-T6 aluminum alloy treated with various quench transfer time. Trans Nonferrous Met Soc China. 2014;24(7):2258.
Song FX, Zhang XM, Liu SD, Tan Q, Li DF. The effect of quench transfer time on microstructure and localized corrosion behavior of 7050-T6 Al alloy. Mater Corros. 2014;65(10):1007.
Wang D, Ni DR, Ma ZY. Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy. Mater Sci Eng A. 2008;494(1–2):360.
Deng Y, Yin ZM, Zhao K, Duan JQ, Hu J, He ZB. Effects of Sc and Zr micro alloying additions and aging time at 120 °C on the corrosion behavior of an Al–Zn–Mg alloy. Corros Sci. 2012;65(65):288.
Yang W, Ji S, Zhang Q, Wang M. Investigation of mechanical and corrosion properties of an Al–Zn–Mg–Cu alloy under various ageing conditions and interface analysis of precipitate. Mater Des. 2015;85:752.
Cina BM. Reducing the susceptibility of alloys, particularly aluminium alloys, to stress corrosion cracking. US Patent 3856584; 1974.
Talianker M, Cina B. Retrogression and reaging and the role of dislocations in the stress corrosion of 7000-type aluminum alloys. Metall Mater Trans A. 1989;20(10):2087.
Park JK, Ardell AJ. Effect of retrogression and reaging treatments on the microstructure of Ai-7075-T651. Metall Trans A. 1984;15(8):1531.
Marlaud T, Deschamps A, Bley F, Lefebvre W, Baroux B. Evolution of precipitate microstructures during the retrogression and re-ageing heat treatment of an Al–Zn–Mg–Cu alloy. Acta Mater. 2010;58(14):4814.
Oliveira AF, Barros MCD, Cardoso KR, Travessa DN. The effect of RRA on the strength and SCC resistance on AA7050 and AA7150 aluminium alloys. Mater Sci Eng A. 2004;379(1–2):321.
Li JF, Birbilis N, Li CX, Jia ZQ, Cai B, Zheng ZQ. Influence of retrogression temperature and time on the mechanical properties and exfoliation corrosion behavior of aluminium alloy AA7150. Mater Charact. 2009;60(11):1334.
Zhang L, Li XY, Nie ZR, Huang H, Sun JT. Microstructure and mechanical properties of a new Al–Zn–Mg–Cu alloy joints welded by laser beam. Mater Des. 2015;83:451.
Wu H, Wen SP, Huang H, Wu XL, Gao KY, Wang W, Nie ZR. Hot deformation behavior and constitutive equation of a new type Al–Zn–Mg–Er–Zr alloy during isothermal compression. Mater Sci Eng A. 2016;651:415.
Chinh NQ, Lendvai J, Ping DH, Hono K. The effect of Cu on mechanical and precipitation properties of Al–Zn–Mg alloys. J Alloys Compd. 2004;378:52.
Wen SP, Xing ZB, Huang H, Li BL, Wang W, Nie ZR. The effect of erbium on the microstructure and mechanical properties of Al–Mg–Mn–Zr alloy. Mater Sci Eng A. 2009;516(1):42.
Wen SP, Gao KY, Huang H, Wang W, Nie ZR. Precipitation evolution in Al–Er–Zr alloys during aging at elevated temperature. J Alloys Compd. 2013;574(1):92.
Viana F, Pinto A, Santos H, Lopes AB. Retrogression and re-ageing of 7075 aluminium alloy: microstructural characterization. J Mater Process Technol. 1999;92–93(99):54.
Feng D, Zhang XM, Liu SD, Wang T, Wu ZZ, Guo YW. The effect of pre-ageing temperature and retrogression heating rate on the microstructure and properties of AA7055. Mater Sci Eng A. 2013;588(5):34.
Xiao P, Liu ZY, Bai S, Lu LQ, Gao LF. Enhanced fatigue crack propagation resistance in a superhigh strength Al–Zn–Mg–Cu alloy by modifying RRA treatment. Mater Charact. 2016;118:438.
Feng C, Ning AL, Liu ZY, Liu YB, Zeng SM. Retrogression and re-aging treatment of Al-9.99% Zn-1.72% Cu-2.5% Mg-0.13% Zr aluminum alloy. Trans Nonferrous Met Soc China. 2006;16(5):1163.
Danh NC, Rajan K, Wallace W. A TEM study of microstructural changes during retrogression and reaging in 7075 aluminum. Metall Trans A. 1983;14(9):1843.
Dixit M, Mishra RS, Sankaran KK. Structure–property correlations in Al 7050 and Al 7055 high-strength aluminum alloys. Mater Sci Eng A. 2008;478(1–2):163.
Xiao YP, Pan QL, Li WB, Liu XY, He YB. Influence of retrogression and re-aging treatment on corrosion behavior of an Al–Zn–Mg–Cu alloy. Mater Des. 2011;32(4):2149.
Jiang D, Liu Y, Liang S, Xie W. The effects of non-isothermal aging on the strength and corrosion behavior of Al–Zn–Mg–Cu alloy. J Alloys Compd. 2016;681:57.
Liu XY, Li MJ, Gao F, Liang SX, Zhang XL, Cui HX. Effects of aging treatment on the intergranular corrosion behavior of Al–Cu–Mg–Ag alloy. J Alloys Compd. 2015;639:263.
Li JF, Zhang ZQ, Li SC, Chen WJ, Ren WD, Zhao XS. Simulation study on function mechanism of some precipitates in localized corrosion of Al alloys. Corros Sci. 2007;49(6):2436.
Wang ZT, Tian RZ. Handbook of Aluminum Alloy and Its Working. 3rd ed. Changsha: Central South University; 2000. 196.
Liu SD, Chen B, Li CB, Dai Y, Deng YL, Zhang XM. Mechanism of low exfoliation corrosion resistance due to slow quenching in high strength aluminium alloy. Corros Sci. 2015;91:203.
Acknowledgements
This work was financially supported by the National Key Basic Research & Development Plan Project (No. 2012CB619503).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lu, JT., Huang, H., Wu, H. et al. Mechanical properties and corrosion behavior of a new RRA-treated Al–Zn–Mg–Cu–Er–Zr alloy. Rare Met. 42, 672–679 (2023). https://doi.org/10.1007/s12598-017-0967-9
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12598-017-0967-9