Flow stress behavior of Al-Cu-Li-Zr alloy containing Sc during hot compression deformation

  • Wen-jie Liang (梁文杰)Email author
  • Qing-lin Pan (潘清林)
  • Yun-bin He (何运斌)
  • Yun-chun Li (李运春)
  • Xiao-gang Zhang (张小刚)


The flow stress behavior of Al-3.5Cu-1.5Li-0.25(Sc+Zr) alloy during hot compression deformation was studied by isothermal compression test using Gleeble-1500 thermal-mechanical simulator. Compression tests were preformed in the temperature range of 653–773 K and in the strain rate range of 0.001–10 s−1 up to a true plastic strain of 0.7. The results indicate that the flow stress of the alloy increases with increasing strain rate at a given temperature, and decreases with increasing temperature at a given imposed strain rate. The relationship between the flow stress and the strain rate and the temperature was derived by analyzing the experimental data. The flow stress is in a hyperbolic sine relationship with the strain rate, and in an Arrhenius relationship with the temperature, which imply that the process of plastic deformation at an elevated temperature for this material is thermally activated. The flow stress of the alloy during the elevated temperature deformation can be represented by a Zener-Hollomon parameter with the inclusion of the Arrhenius term. The values of n, α and A in the analytical expressions of flow stress σ are fitted to be 5.62, 0.019 MPa−1 and 1.51×1016 s−1, respectively. The hot deformation activation energy is 240.85 kJ/mol.

Key words

Al-Cu-Li-Zr alloy containing Sc flow stress hot compression deformation Zener-Hollomon parameter 


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  1. [1]
    GILMORE D L, STARKE E A Jr. Trace element effects on precipitation processes and mechanical properties in an Al-Cu-Li alloy [J]. Metall Mater Trans A, 1997, 28(7): 1399–1415.CrossRefGoogle Scholar
  2. [2]
    TAN Cheng-yu, ZHENG Zi-qiao, XIA Chang-qing, LIANG Ying. The aging feature of Al-Li-Cu-Zr alloy containing Sc [J]. J Cent South Univ Technol, 2000, 7(2): 65–67.CrossRefGoogle Scholar
  3. [3]
    ZHAO Zhi-long, LIU Lin, CHEN Zheng. Effect of rare earth cerium on yield strength anisotropy of Al-Li alloy sheet and its theoretical prediction [J]. J Rare Earth, 2004, 22(3): 410–413.Google Scholar
  4. [4]
    BEREZINA A L, VOLKOV V A, IVANOV S V, KOLOONEV N I, CHUISTOV K V. The influence of scandium on the kinetics and morphology of decomposition of alloys of the Al-Li system [J]. Phys Met Metall, 1991, 71(2): 167–175.Google Scholar
  5. [5]
    HUANG Lan-ping, ZHENG Zi-qiao, HUANG Yong-ping, ZHONG Li-ping. Effect of Sc on microstructure and mechanical properties of 2197 Al-Li alloy [J]. Journal of Central South University: Science and Technology, 2005, 36(1): 20–24. (in Chinese)Google Scholar
  6. [6]
    LIANG Wen-jie, PAN Qing-lin, ZHU Zhao-ming, HE Yun-bin, LIU Yuan-fei, YIN Zhi-min. Effect of minor Sc on microstructure and tensile properties of Al-Cu-Li-Zr alloy [J]. Rare Metal Materials and Engineering, 2006, 35(4): 550–553. (in Chinese)Google Scholar
  7. [7]
    FU G S, CHEN W Z, QIAN K W. Behavior of flow stress of aluminum sheets used for pressure can during compression at elevated temperature [J]. Acta Metallurgica Sinica: English Letters, 2005, 18(6): 756–762.Google Scholar
  8. [8]
    ZHAN Mei-yan, CHEN Zhen-hua, ZHANG Hui, XIA Wei-yun. Flow stress behavior of porous FVS0812 aluminum alloy during hot-compression [J]. Mech Res Commun, 2006, 33: 508–514.CrossRefGoogle Scholar
  9. [9]
    ZHOU H T, ZENG X Q, WANG Q D, DING W J. A flow stress model for AZ61 magnesium alloy [J]. Acta Metallurgica Sinica: English Letters, 2004, 17(2): 155–160.Google Scholar
  10. [10]
    SASTRY D H, PRASAD Y V R K, DEEVI S C. Influence of temperature and strain rate on the flow stress of an FeAl alloy [J]. Mater Sci Eng A, 2001, A299: 157–163.CrossRefGoogle Scholar
  11. [11]
    HAN Dong-feng, ZHENG Zi-qiao, JIANG Na, LI Jing-feng. Flow stress of high-strength weldable 2195 aluminum-lithium alloy during hot compression deformation [J]. The Chinese Journal of Nonferrous Metals, 2004, 14(12): 2090–2095. (in Chinese)Google Scholar
  12. [12]
    SHEN Jian. Behavior of flow stress of 2091 Al-Li alloy during hot compression [J]. Chinese Journal of Rare Metals, 1998, 22(1): 47–50. (in Chinese)MathSciNetGoogle Scholar
  13. [13]
    TAKUDA H, FUJIMOTO H, HATTA N. Modeling on flow stress of Mg-Al-Zn alloys at elevated temperatures [J]. J Mater Process Tech, 1998, 80/81: 513–516.CrossRefGoogle Scholar
  14. [14]
    RAYBOULD D, SHEPPARD T. Axisymmetric extrusion—The effect of temperature rise and strain rate on the activation enthalpy and material constants of some aluminum alloys and their relation to recrystallization, substructure and subsequent mechanical properties [J]. J Inst Metals, 1973, 101: 65–72.Google Scholar
  15. [15]
    WANG Yu, LIN Dong-liang, LAW C C. A correlation between tensile flow stress and Zener-Hollomon factor in TiAl alloys at high temperatures [J]. Journal of Materials Science Letters, 2000, 19(13):1185–1188.CrossRefGoogle Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Wen-jie Liang (梁文杰)
    • 1
    • 2
    Email author
  • Qing-lin Pan (潘清林)
    • 1
  • Yun-bin He (何运斌)
    • 1
  • Yun-chun Li (李运春)
    • 1
  • Xiao-gang Zhang (张小刚)
    • 1
  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaChina
  2. 2.School of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina

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