Skip to main content
SpringerLink
Log in

Creep aging behavior and performance of Al-Zn-Mg-Cu alloys under different parameters in retrogression aging treatment

回归时效参数对Al-Zn-Mg-Cu RRA合金蠕变时效行为与性能的影响

  • Published:
Journal of Central South University Aims and scope Submit manuscript

Abstract

A study was conducted to better understand how different parameters, namely, regression aging time and regression aging temperature, affect the creep aging properties, i.e., the creep deformation and performance of Al-Zn-Mg-Cu alloy during regressive reaging. The corresponding creep strain and mechanical properties of samples were studied by conducting creep tests and uniaxial tensile tests. The electrical conductivity was measured using an eddy-current conductivity meter. The microstructures were observed by transmission electron microscopy (TEM). With the increase in regression aging time, the steady creep strain first increased and then decreased, and reached the maximum at 45 min. The steady creep strain increased with the increase in regression aging temperature, and reached the maximum at 200 °C. The level of steady creep strain was determined by precipitation and dislocation recovery. Creep aging strengthens 7B50-RRA treated with regression aging time at 190 °C for 10 min, and the difference in the mechanical properties of alloy becomes smaller. The diffusion of solute atoms reduces the scattering of electrons, leading to a significant improvement in electrical conductivity and stress corrosion cracking (SCC) resistance after creep aging. The findings of this study could help in the application of creep aging forming (CAF) technology in Al-Zn-Mg-Cu alloy under RRA treatment.

摘要

研究了回归时效时间和回归时效温度对Al-Zn-Mg-Cu RRA合金蠕变变形和性能的影响. 通过蠕变试验和单轴拉伸试验研究试样的蠕变应变和力学性能. 采用涡流电导率仪测定样品的电导率, 采用透射电镜(TEM)观察微组织. 结果表明, 随着回归时效时间的延长, 蠕变应变先增大后减小, 在45 min时达到最大值. 蠕变应变随回归时效温度的升高而增大, 在200 °C时达到最大. 稳态蠕变应变水平由析出相和位错回复决定. 蠕变时效强化了经190 °C回归时效10 min 的7B50-RRA合金, 减小了合金力学性能差异. 溶质原子的扩散减少了电子的散射, 使蠕变时效大大增强了材料的导电性和抗应力腐蚀性能. 研究结果有助于蠕变时效成形(CAF)技术在Al-Zn-Mg-Cu RRA合金中的应用.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. HEINZ A, HASZLER A, KEIDEL C, et al. Recent development in aluminium alloys for aerospace applications [J]. Materials Science and Engineering A, 2000, 280(1): 102–107. DOI: https://doi.org/10.1016/S0921-5093(99)00674-7.

    Article  Google Scholar 

  2. ROUT P K, GHOSH M M, GHOSH K S. Microstructural, mechanical and electrochemical behaviour of a 7017 Al−Zn−Mg alloy of different tempers [J]. Materials Characterization, 2015, 104: 49–60. DOI: https://doi.org/10.1016/j.matchar.2015.03.025.

    Article  Google Scholar 

  3. CHEN Cun-guang, HAN Wei-hao, QI Miao, et al. Microstructural evolution and mechanical properties of an ultrahigh-strength Al−Zn−Mg−Cu alloy via powder metallurgy and hot extrusion [J]. Journal of Central South University, 2021, 28(4): 1195–1205. DOI: https://doi.org/10.1007/s11771-021-4669-y.

    Article  Google Scholar 

  4. SUN Wen-wen, ZHU Yu-man, MARCEAU R, et al. Precipitation strengthening of aluminum alloys by room-temperature cyclic plasticity [J]. Science, 2019, 363(6430): 972–975. DOI: https://doi.org/10.1126/science.aav7086.

    Article  Google Scholar 

  5. AZARNIYA A, TAHERI A K, TAHERI K K. Recent advances in ageing of 7xxx series aluminum alloys: A physical metallurgy perspective [J]. Journal of Alloys and Compounds, 2019, 781: 945–983. DOI: https://doi.org/10.1016/j.jallcom.2018.11.286.

    Article  Google Scholar 

  6. OLIVEIRA A F, DE BARROS M C, CARDOSO K R, et al. The effect of RRA on the strength and SCC resistance on AA7050 and AA7150 aluminium alloys [J]. Materials Science and Engineering A, 2004, 379(1, 2): 321–326. DOI: https://doi.org/10.1016/j.msea.2004.02.052.

    Article  Google Scholar 

  7. XU Yong-qian, ZHAN Li-hua, LI Shu-jian, et al. Effect of stress-aging treatments on precipitates of pre-retrogressed Al−Zn−Mg−Cu alloy [J]. Rare Metal Materials and Engineering, 2017, 46(2): 355–362. DOI: https://doi.org/10.1016/S1875-5372(17)30094-2.

    Article  Google Scholar 

  8. XU Ling-zhi, ZHAN Li-hua, XU Yong-qian, et al. Thermomechanical pretreatment of Al−Zn−Mg−Cu alloy to improve formability and performance during creep-age forming [J]. Journal of Materials Processing Technology, 2021, 293: 117089. DOI: https://doi.org/10.1016/j.jmatprotec.2021.117089.

    Article  Google Scholar 

  9. LIN Yong-cheng, ZHANG Jin-long, LIU Guan, et al. Effects of pre-treatments on aging precipitates and corrosion resistance of a creep-aged Al−Zn−Mg−Cu alloy [J]. Materials & Design, 2015, 83: 866–875. DOI: https://doi.org/10.1016/j.matdes.2015.06.029.

    Article  Google Scholar 

  10. LEI Chao, YANG He, LI Heng, et al. Dependence of creep age formability on initial temper of an Al−Zn−Mg−Cu alloy [J]. Chinese Journal of Aeronautics, 2016, 29(5): 1445–1454. DOI: https://doi.org/10.1016/j.cja.2016.04.022.

    Article  Google Scholar 

  11. LIN Yong-cheng, ZHANG Jin-long, CHEN Ming-song. Evolution of precipitates during two-stage stress-aging of an Al−Zn−Mg−Cu alloy [J]. Journal of Alloys and Compounds, 2016, 684: 177–187. DOI: https://doi.org/10.1016/j.jallcom.2016.05.161.

    Article  Google Scholar 

  12. LIN Yong-cheng, LIU Guan, CHEN Ming-song, et al. Effects of two-stage creep-aging processing on mechanical properties of an Al−Cu−Mg alloy [J]. Materials & Design, 2015, 79: 127–135. DOI: https://doi.org/10.1016/j.matdes.2015.04.047.

    Article  Google Scholar 

  13. RATCHEV P, VERLINDEN B, de SMET P, et al. Effect of cooling rate and predeformation on the precipitation hardening of an Al−4.2wt.%Mg−0.6wt.%Cu alloy [J]. Scripta Materialia, 1998, 38(8): 1195–1201. DOI: https://doi.org/10.1016/S1359-6462(98)00024-4.

    Article  Google Scholar 

  14. LI Hui-zhong, LIU Ruo-mei, LIANG Xiao-peng, et al. Effect of pre-deformation on microstructures and mechanical properties of high purity Al−Cu−Mg alloy [J]. Transactions of Nonferrous Metals Society of China, 2016, 26(6): 1482–1490. DOI: https://doi.org/10.1016/S1003-6326(16)64253-X.

    Article  Google Scholar 

  15. GABLE B M, ZHU A W, CSONTOS A A, et al. The role of plastic deformation on the competitive microstructural evolution and mechanical properties of a novel Al−Li−Cu−X alloy [J]. Journal of Light Metals, 2001, 1(1): 1–14. DOI: https://doi.org/10.1016/S1471-5317(00)00002-X.

    Article  Google Scholar 

  16. RODGERS B I, PRANGNELL P B. Quantification of the influence of increased pre-stretching on microstructure-strength relationships in the Al−Cu−Li alloy AA2195 [J]. Acta Materialia, 2016, 108: 55–67. DOI: https://doi.org/10.1016/j.actamat.2016.02.017.

    Article  Google Scholar 

  17. LIN Yong-cheng, JIANG Yu-qiang, CHEN Xiao-min, et al. Effect of creep-aging on precipitates of 7075 aluminum alloy [J]. Materials Science and Engineering A, 2013, 588: 347–356. DOI: https://doi.org/10.1016/j.msea.2013.09.045.

    Article  Google Scholar 

  18. LYU Feng-gong, LI Yong, SHI Zhu-sheng, et al. Stress and temperature dependence of stress relaxation ageing behaviour of an Al−Zn−Mg alloy [J]. Materials Science and Engineering A, 2020, 773: 138859. DOI: https://doi.org/10.1016/j.msea.2019.138859.

    Article  Google Scholar 

  19. GUO Wei, GUO Ji-yan, WANG Jin-duo, et al. Evolution of precipitate microstructure during stress aging of an Al−Zn−Mg−Cu alloy [J]. Materials Science and Engineering A, 2015, 634: 167–175. DOI: https://doi.org/10.1016/j.msea.2015.03.047.

    Article  Google Scholar 

  20. ZHENG Jing-hua, PAN Ran, LI Chen, et al. Experimental investigation of multi-step stress-relaxation-ageing of 7050 aluminium alloy for different pre-strained conditions [J]. Materials Science and Engineering A, 2018, 710: 111–120. DOI: https://doi.org/10.1016/j.msea.2017.10.066.

    Article  Google Scholar 

  21. HE Zhun-ke, LI Qun, LIU Sheng-dan, et al. Influence of pre-stretching on quench sensitive effect of high-strength Al−Zn−Mg−Cu−Zr alloy sheet [J]. Journal of Central South University, 2021, 28(9): 2660–2669. DOI: https://doi.org/10.1007/s11771-021-4800-0.

    Article  Google Scholar 

  22. LI J F, BIRBILIS N, LI C X, et al. Influence of retrogression temperature and time on the mechanical properties and exfoliation corrosion behavior of aluminium alloy AA7150 [J]. Materials Characterization, 2009, 60(11): 1334–1341. DOI: https://doi.org/10.1016/j.matchar.2009.06.007.

    Article  Google Scholar 

  23. ZHAO Huan, GAULT B, PONGE D, et al. Reversion and re-aging of a peak aged Al−Zn−Mg−Cu alloy [J]. Scripta Materialia, 2020, 188: 269–273. DOI: https://doi.org/10.1016/j.scriptamat.2020.07.049.

    Article  Google Scholar 

  24. NANDANA M S, BHAT K U, MANJUNATHA C M. Influence of retrogression and re-ageing heat treatment on the fatigue crack growth behavior of 7010 aluminum alloy [J]. Procedia Structural Integrity, 2019, 14: 314–321. DOI: https://doi.org/10.1016/j.prostr.2019.05.039.

    Article  Google Scholar 

  25. XIA Peng, LIU Zhi-yi, BAI Song, et al. Enhanced fatigue crack propagation resistance in a superhigh strength Al−Zn−Mg−Cu alloy by modifying RRA treatment [J]. Materials Characterization, 2016, 118: 438–445. DOI: https://doi.org/10.1016/j.matchar.2016.06.023.

    Article  Google Scholar 

  26. XU Yong-qian, ZHAN Li-hua, XU Ling-zhi, et al. Experimental research on creep aging behavior of Al−Cu−Mg alloy with tensile and compressive stresses [J]. Materials Science and Engineering A, 2017, 682: 54–62. DOI: https://doi.org/10.1016/j.msea.2016.11.043.

    Article  Google Scholar 

  27. CHEN J F, JIANG J T, ZHEN L, et al. Stress relaxation behavior of an Al−Zn−Mg−Cu alloy in simulated age-forming process [J]. Journal of Materials Processing Technology, 2014, 214(4): 775–783. DOI: https://doi.org/10.1016/j.jmatprotec.2013.08.017.

    Article  Google Scholar 

  28. CHEN Xue-ying, ZHAN Li-hua, MA Zi-yao, et al. Study on tensile/compressive asymmetry in creep ageing behavior of Al−Cu alloy under different stress levels [J]. Journal of Alloys and Compounds, 2020, 843: 156157. DOI: https://doi.org/10.1016/j.jallcom.2020.156157.

    Article  Google Scholar 

  29. PHAM M S, IADICOLA M, CREUZIGER A, et al. Thermally-activated constitutive model including dislocation interactions, aging and recovery for strain path dependence of solid solution strengthened alloys: Application to AA5754-O [J]. International Journal of Plasticity, 2015, 75: 226–243. DOI: https://doi.org/10.1016/j.ijplas.2014.09.010.

    Article  Google Scholar 

  30. SEIDMAN D N, MARQUIS E A, DUNAND D C. Precipitation strengthening at ambient and elevated temperatures of heat-treatable Al(Sc) alloys [J]. Acta Materialia, 2002, 50(16): 4021–4035. DOI: https://doi.org/10.1016/S1359-6454(02)00201-X.

    Article  Google Scholar 

  31. LUMLEY R N, MORTON A J, POLMEAR I J. Enhanced creep performance in an Al−Cu−Mg−Ag alloy through underageing [J]. Acta Materialia, 2002, 50(14): 3597–3608. DOI: https://doi.org/10.1016/S1359-6454(02)00164-7.

    Article  Google Scholar 

  32. FENG Chun, LIU Zhi-yi, NING Ai-lin, et al. Retrogression and re-aging treatment of Al−9.99%Zn−1.72Retrogression and re-aging treatment of Al−9.99%Zn−1.72 5%Mg−0.13%Zr aluminum alloy [J]. Transactions of Nonferrous Metals Society of China, 2006, 16(5): 1163–1170. DOI: https://doi.org/10.1016/s1003-6326(06)60395-6.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Nan-hui Peng  (彭南辉), Li-hua Zhan  (湛利华), Ling-zhi Xu  (徐凌志) & Wen-fang Yu  (余汶芳)

  2. Light Alloy Research Institute, Central South University, Changsha, 410083, China

    Li-hua Zhan  (湛利华) & Bo-lin Ma  (马博林)

  3. State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha, 410083, China

    Li-hua Zhan  (湛利华)

  4. Zte Corporation, Changsha, 410205, China

    Qing Wang  (王庆)

  5. Shanghai Institute of Spaceflight Control Technology, Shanghai, 201109, China

    Feng Shen  (沈烽)

Authors
  1. Nan-hui Peng  (彭南辉)
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Li-hua Zhan  (湛利华)
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Bo-lin Ma  (马博林)
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Qing Wang  (王庆)
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Ling-zhi Xu  (徐凌志)
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Wen-fang Yu  (余汶芳)
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Feng Shen  (沈烽)
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to Li-hua Zhan  (湛利华) or Bo-lin Ma  (马博林).

Additional information

Foundation item: Project(2017YFB0306300) supported by the National key R&D Program of China; Projects(51675538, 51905551) supported by the National Natural Science Foundation of China; Project(ZZYJKT2019-11) supported by Free Exploration Project of State Key Laboratory of High performance Complex Manufacturing, China

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Peng, Nh., Zhan, Lh., Ma, Bl. et al. Creep aging behavior and performance of Al-Zn-Mg-Cu alloys under different parameters in retrogression aging treatment. J. Cent. South Univ. 29, 986–998 (2022). https://doi.org/10.1007/s11771-022-4955-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11771-022-4955-3

Key words

关键词

Search

Navigation