Hot deformation behavior of 7A04 aluminum alloy at elevated temperature: constitutive modeling and verification

  • Zhao Qiang
  • Chen Wen
  • Lin JunEmail author
  • Huang Shuhai
  • Xia Xiangsheng
Original Research


The hot deformation behaviour of one 7XXX series aluminium alloy, 7A04, has been studied by conducting isothermal hot compression tests with degree of compression up to 55% at the temperature ranging from 350 °C to 480 °C and strain rates ranging from 0.002 s−1 to 20s−1. Based on characteristic of the flow stress obtained from those tests, an extended Voce equation, which constant parameters were modified as Arrhenius-type type equation, was given and used to calculate the flow stresses under the conditions of the hot deformation. The parameters of extended Voce equation were determined by experimental results. The comparison between the experimental and predicted flow stress values at the hot compression parameters range indicated good agreement. The average absolute relative error, root mean square error and the correlation coefficient were found to be 4.9%, 4.8 MPa and 0.997, respectively, which confirmed the extended Voce model had good accuracy. Additional, a finite element simulation model of isothermal hot compression process was used to verify the new Voce equation and the results verified the accuracy of the new equation. The main softening mechanism of the hot deformation was dynamic recovery and was confirmed by optical microstructures.


Aluminum alloy Hot compression behavior Constitutive models FE simulation 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


  1. 1.
    Immarigeon J, Zhao L, Wallace W (1995) Lightweight materials for aircraft applications. Mater Charact 35(1):41–67CrossRefGoogle Scholar
  2. 2.
    Jr EAS, Williams JC (2003) Progress in structural materials for aerospace systems1. Acta Mater 51(19):5775–5799CrossRefGoogle Scholar
  3. 3.
    Zhang X, Chen Y, Hu J (2018) Recent advances in the development of aerospace materials. Prog Aerosp Sci 97:22–34CrossRefGoogle Scholar
  4. 4.
    Zhang Y, Jiang S, Zhao Y, Shan D (2013) Isothermal precision forging of complex-shape rotating disk of aluminum alloy based on processing map and digitized technology. Mat Sci Eng A-Struct 580:294–304CrossRefGoogle Scholar
  5. 5.
    Lin YC, Chen XM (2011) A critical review of experimental results and constitutive descriptions for metals and alloys in hot working. Mater Design 32(4):1733–1759CrossRefGoogle Scholar
  6. 6.
    McQueen H J, Ryan N D (2002) Constitutive analysis in hot working. Mat Sci Eng A-Struct322: 43–63Google Scholar
  7. 7.
    Sheppard T, Jackson A (1997) Constitutive equations for use in prediction of flow stress during extrusion of aluminum alloys. Mater Sci Technol 13(3):203–209CrossRefGoogle Scholar
  8. 8.
    Zener C, Hollomon JH (1944) Effect of strain-rate upon the plastic flow of steel. J Appl Phys 15(1):22–32CrossRefGoogle Scholar
  9. 9.
    Saravanan L, Senthilvelan T (2016) Constitutive equation and microstructure evaluation of an extruded aluminum alloy. J Mater Res Technol 5(1):521–528Google Scholar
  10. 10.
    Jin N, Zhang H, Han Y, Wu W, Chen J (2011) Hot deformation behavior of 7150 aluminum alloy during compression at elevated temperature. Mater Charact 60:530–536CrossRefGoogle Scholar
  11. 11.
    Shi C, Mao W, Chen XG (2013) Evolution of activation energy during hot deformation of AA7150 aluminum alloy. Mat Sci Eng A-Struct 571:83–91CrossRefGoogle Scholar
  12. 12.
    Chen L, Zhao G, Yu J, Zhang W (2015) Constitutive analysis of homogenized 7005 aluminum alloy at evaluated temperature for extrusion process. Mater Design 66:129–136CrossRefGoogle Scholar
  13. 13.
    Li J, Li F, Cai J, Wang R, Yuan Z, Xue F (2012) Flow behavior modeling of the 7050 aluminum alloy at elevated temperatures considering the compensation of strain. Mater Design 42:369–377CrossRefGoogle Scholar
  14. 14.
    Lin YC, Ding Y, Chen M, Deng J (2012) A new phenomenological constitutive model for hot tensile deformation behaviors of a typical Al–cu–mg alloy. Mater Design 52:993–1002Google Scholar
  15. 15.
    Haghdadi N, Zarei-Hanzaki A, Khalesian AR, Abedi HR (2013) Artificial neural network modeling to predict the hot deformation behavior of an A356 aluminum alloy. Mater Design 49:386–391CrossRefGoogle Scholar
  16. 16.
    Rokni MR, Zarei-Hanzaki A, Roostaei AA, Abedi HR (2011) An investigation into the hot deformation characteristics of 7075 aluminum alloy. Mater Design 32(4):2339–2344CrossRefGoogle Scholar
  17. 17.
    Sun ZC, Zheng LS, Yang H (2014) Softening mechanism and microstructure evolution of as-extruded 7075 aluminum alloy during hot deformation. Mater Charact 90:71–80CrossRefGoogle Scholar
  18. 18.
    Wang N, Ilinich A, Chen M, Luckey G, D'Amours G (2019) A comparison study on forming limit prediction methods for hot stamping of 7075 aluminum sheet. Int J Mech Sci 151:444–460CrossRefGoogle Scholar
  19. 19.
    D'Amours G, Ilinich A (2018) Plasticity and damage modeling of the AA7075 Aluminium alloy for hot stamping. In: 15th international LS-DYNA users conferenceGoogle Scholar
  20. 20.
    D'Amours G, Ilinich A (2018) High temperature characterization and material model calibration for hot stamping of AA7075 aluminium sheet. In: International deep-drawing research group conferenceGoogle Scholar
  21. 21.
    Béland JF, D'Amours G (2011) Warm forming of 7075 aluminium alloy tubes to produce complex and strong parts. SAE 2012 World CongressGoogle Scholar
  22. 22.
    D'Amours, G. and J.F. Béland (2011) Warm forming simulation of 7075 aluminium alloy tubes using LS-DYNA, 8th European LS-DYNA Users ConferenceGoogle Scholar
  23. 23.
    Voce E (1955) A practical strain-hardening function. Metallurgia 51:219–225Google Scholar
  24. 24.
    Oudin A, Barnett MR, Hodgson PD (2004) Grain size effect on the warm deformation behaviour of a Ti-IF steel. Mat Sci Eng A-Struct 367(1-2):282–294CrossRefGoogle Scholar
  25. 25.
    Cerria E, Evangelistaa E, Forcellesea A, McQueen HJ (1995) Comparative hot workability of 7012 and 7075 alloys after different pretreatments. Mat Sci Eng A-Struct 197(2):181–198CrossRefGoogle Scholar
  26. 26.
    He D-G, Lin YC, Chen J, Chen D-D, Huang J, Tang Y, Chen M-S (2018) Microstructural evolution and support vector regression model for an aged Ni-based superalloy during two-stage hot forming with stepped strain rates. Mater Design 154:51–62CrossRefGoogle Scholar
  27. 27.
    Chen X-M, Lin YC, Wen D-X, Zhang J-L, He M (2014) Dynamic recrystallization behavior of a typical nickel-based superalloy during hot deformation. Mater Design 57:568–577CrossRefGoogle Scholar
  28. 28.
    Lin YC, Wu X-Y, Xiao-Min C, Jian C, Wena D-X, Zhang J-L, Li L-T (2015) EBSD study of a hot deformed nickel-based superalloy. J ALLOY COMPD 640:101–113CrossRefGoogle Scholar
  29. 29.
    Chen Q, Xia X, Yuan B, Shu D, Zhao Z (2013) Microstructure evolution and mechanical properties of 7a09 high strength aluminium alloy processed by backward extrusion at room temperature. Mat Sci Eng A-Struct 588:395–402CrossRefGoogle Scholar
  30. 30.
    Chen Q, Chen G, Ji X, Han F, Zhao Z, Wan J, Xiao X (2017) Compound forming of 7075 aluminum alloy based on functional integration of plastic deformation and thixoformation. J Mater Process Technol 246:167–175CrossRefGoogle Scholar

Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  • Zhao Qiang
    • 1
  • Chen Wen
    • 1
  • Lin Jun
    • 1
    Email author
  • Huang Shuhai
    • 1
  • Xia Xiangsheng
    • 1
  1. 1.Southwest Technology and Engineering Research InstituteChongqingChina

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