Journal of Materials Engineering and Performance

, Volume 26, Issue 3, pp 1311–1324 | Cite as

Deformation Behavior of Severely Deformed Al and Related Mechanisms Through Warm Tensile Test



Flow stress and ductility behaviors of the annealed and severely deformed Al were investigated at warm deformation temperatures. Constrained groove pressing (CGP) method as a severe plastic deformation process was used. The tensile test was carried out at the temperature range of the 298-573 K and strain rate range of 0.001-0.1 s−1 to present the elevated temperature deformation behavior utilizing hyperbolic sine constitutive equation. The flow stress of the CGPed sample is increased with the number of CGP passes and decreased with temperature. Dynamic recovery and strain softening are found as main restoration mechanisms. Flow stress amounts are not remarkably affected by the strain rate. Values of the elongation are decreased with the number of CGP passes. Values of the calculated strain rate sensitivity are utilized to justify the elongation behavior. Shear bands created by CGP remarkably decrease the fracture elongation values. Temperature interval of 298-473 K cannot remarkably affect the flow stress and ductility. The interval of 473-573 K is chosen as critical temperature interval in which the values of flow stress and elongation are remarkably decreased and increased, respectively. Increasing the temperature up to 573 K causes recrystallization in shear bands. Scanning electron microscope was used to study fracture surface which can truly predict the elongation behavior. With increasing the temperature, the shear decohesion area is gradually replaced with fully dimpled structures. Finally, hot deformation activation energy for CGPed samples was calculated about 85 kJ/mol which is close to the grain boundary diffusion activation energy in pure Al.


activation energy ductility flow stress fracture surface severe plastic deformation warm deformation 



The authors wish to thank the research board of Sharif University of Technology for the financial support and the provision of the research facilities used in this work.


  1. 1.
    K. Ivanov and E. Naydenkin, Activation Parameters and Deformation Mechanisms of Ultrafine-Grained Copper Under Tension at Moderate Temperatures, Mater. Sci. Eng. A, 2014, 608, p 123–129CrossRefGoogle Scholar
  2. 2.
    R. Kapoor and J. Chakravartty, Deformation Behavior of an Ultrafine-Grained Al-Mg Alloy Produced by Equal-Channel Angular Pressing, Acta Mater., 2007, 55(16), p 5408–5418CrossRefGoogle Scholar
  3. 3.
    A. Azimi, S. Tutunchilar, G. Faraji, and M.B. Givi, Mechanical Properties and Microstructural Evolution During Multi-Pass ECAR of Al 1100-O Alloy, Mater. Des., 2012, 42, p 388–394CrossRefGoogle Scholar
  4. 4.
    M.S. Soliman, E.A. El-Danaf, and A.A. Almajid, Enhancement of Static and Fatigue Strength of 1050 Al Processed by Equal-Channel Angular Pressing Using Two Routes, Mater. Sci. Eng. A, 2012, 532, p 120–129CrossRefGoogle Scholar
  5. 5.
    E.A. El-Danaf, Mechanical Properties and Microstructure Evolution of 1050 Aluminum Severely Deformed by Ecap to 16 Passes, Mater. Sci. Eng. A, 2008, 478(1), p 189–200CrossRefGoogle Scholar
  6. 6.
    B. Tolaminejad and K. Dehghani, Microstructural Characterization and Mechanical Properties of Nanostructured AA1070 Aluminum After Equal Channel Angular Extrusion, Mater. Des., 2012, 34, p 285–292CrossRefGoogle Scholar
  7. 7.
    E. Hosseini and M. Kazeminezhad, A New Microstructural Model Based on Dislocation Generation and Consumption Mechanisms Through Severe Plastic Deformation, Comput. Mater. Sci., 2011, 50(3), p 1123–1135CrossRefGoogle Scholar
  8. 8.
    J. Zrnik, T. Kovarik, Z. Novy, and M. Cieslar, Ultrafine-Grained Structure Development and Deformation Behavior of Aluminium Processed by Constrained Groove Pressing, Mater. Sci. Eng. A, 2009, 503(1), p 126–129CrossRefGoogle Scholar
  9. 9.
    A. Krishnaiah, U. Chakkingal, and P. Venugopal, Production of Ultrafine Grain Sizes in Aluminium Sheets by Severe Plastic Deformation Using the Technique of Groove Pressing, Scr. Mater., 2005, 52(12), p 1229–1233CrossRefGoogle Scholar
  10. 10.
    N. Tsuji, T. Toyoda, Y. Minamino, Y. Koizumi, T. Yamane, M. Komatsu, and M. Kiritani, Microstructural Change of Ultrafine-Grained Aluminum During High-Speed Plastic Deformation, Mater. Sci. Eng. A, 2003, 350(1), p 108–116CrossRefGoogle Scholar
  11. 11.
    C. Xu, K. Xia, and T.G. Langdon, The Role of Back Pressure in the Processing of Pure Aluminum by Equal-Channel Angular Pressing, Acta Mater., 2007, 55(7), p 2351–2360CrossRefGoogle Scholar
  12. 12.
    M. Hockauf and L.W. Meyer, Work-Hardening Stages of AA1070 and AA6060 After Severe Plastic Deformation, J. Mater. Sci., 2010, 45(17), p 4778–4789CrossRefGoogle Scholar
  13. 13.
    E. Rafizadeh, A. Mani, and M. Kazeminezhad, The Effects of Intermediate and Post-Annealing Phenomena on the Mechanical Properties and Microstructure of Constrained Groove Pressed Copper Sheet, Mater. Sci. Eng. A, 2009, 515(1), p 162–168CrossRefGoogle Scholar
  14. 14.
    N. Kamikawa, N. Tsuji, X. Huang, and N. Hansen, Quantification of Annealed Microstructures in ARB Processed Aluminum, Acta Mater., 2006, 54(11), p 3055–3066CrossRefGoogle Scholar
  15. 15.
    F. Khodabakhshi and M. Kazeminezhad, The Annealing Phenomena and Thermal Stability of Severely Deformed Steel Sheet, Mater. Sci. Eng. A, 2011, 528(15), p 5212–5218CrossRefGoogle Scholar
  16. 16.
    N.Q. Chinh, T. Csanádi, J. Gubicza, R. Valiev, B.B. Straumal, and T.G. Langdon, The Effect of Grain Boundary Sliding and Strain Rate Sensitivity on the Ductility of Ultrafine-Grained Materials, Mater. Sci. Forum, 2010, 667, p 677–682CrossRefGoogle Scholar
  17. 17.
    N.Q. Chinh, T. Csanádi, T. Győri, R. Valiev, B.B. Straumal, M. Kawasaki, and T.G. Langdon, Strain Rate Sensitivity Studies in an Ultrafine-Grained Al-30 wt.% Zn Alloy Using Micro-and Nanoindentation, Mater. Sci. Eng. A, 2012, 543, p 117–120CrossRefGoogle Scholar
  18. 18.
    Y. Jia, F. Cao, S. Guo, P. Ma, J. Liu, and J. Sun, Hot Deformation Behavior of Spray-Deposited Al-Zn-Mg-Cu Alloy, Mater. Des., 2014, 53, p 79–85CrossRefGoogle Scholar
  19. 19.
    A. Rollett, F.J. Humphreys, G.S. Rohrer, and M. Hatherly, Recrystallization and Related Annealing Phenomena, Elsevier, New York, 2004Google Scholar
  20. 20.
    C. Shi, W. Mao, and X. Chen, Evolution of Activation Energy During Hot Deformation of AA7150 Aluminum Alloy, Mater. Sci. Eng. A, 2013, 571, p 83–91CrossRefGoogle Scholar
  21. 21.
    Y.C. Lin, Y. Ding, M.S. Chen, and J. Deng, A New Phenomenological Constitutive Model for Hot Tensile Deformation Behaviors of a Typical Al-Cu-Mg Alloy, Mater. Des., 2013, 52, p 118–127CrossRefGoogle Scholar
  22. 22.
    M. Zhou, Y.C. Lin, J. Deng, and Y.Q. Jiang, Hot Tensile Deformation Behaviors and Constitutive Model of an Al-Zn-Mg-Cu Alloy, Mater. Des., 2014, 59, p 141–150CrossRefGoogle Scholar
  23. 23.
    Y. Li, X. Zeng, and W. Blum, Transition from Strengthening to Softening by Grain Boundaries in Ultrafine-Grained Cu, Acta Mater., 2004, 52(17), p 5009–5018CrossRefGoogle Scholar
  24. 24.
    Y.G. Ko, D.H. Shin, K.T. Park, and C.S. Lee, An Analysis of the Strain Hardening Behavior of Ultra-Fine Grain Pure Titanium, Scr. Mater., 2006, 54(10), p 1785–1789CrossRefGoogle Scholar
  25. 25.
    X. Huang, H. Zhang, Y. Han, W. Wu, and J. Chen, Hot Deformation Behavior of 2026 Aluminum Alloy During Compression at Elevated Temperature, Mater. Sci. Eng. A, 2010, 527(3), p 485–490CrossRefGoogle Scholar
  26. 26.
    N. Jin, H. Zhang, Y. Han, W. Wu, and J. Chen, Hot Deformation Behavior of 2026 Aluminum Alloy During Compression at Elevated Temperature, Mater. Charact., 2009, 60(6), p 530–536CrossRefGoogle Scholar
  27. 27.
    H.E. Hu, L. Zhen, L. Yang, W.Z. Shao, and B.Y. Zhang, Deformation Behavior and Microstructure Evolution of 7050 Aluminum Alloy During High Temperature Deformation, Mater. Sci. Eng. A, 2008, 488(1), p 64–71CrossRefGoogle Scholar
  28. 28.
    C.M. Sellars and W.J. McTegart, On the Mechanism of Hot Deformation, Acta Metall., 1966, 14(9), p 1136–1138CrossRefGoogle Scholar
  29. 29.
    H. McQueen and N. Ryan, Constitutive Analysis in Hot Working, Mater. Sci. Eng. A, 2002, 322(1), p 43–63CrossRefGoogle Scholar
  30. 30.
    S. Spigarelli, E. Evangelista, E. Cerri, and T.G. Langdon, Constitutive Equations for Hot Deformation of an Al-6061/20% Al2o3 Composite, Mater. Sci. Eng. A, 2001, 319, p 721–725CrossRefGoogle Scholar
  31. 31.
    N. Afrin, D.L. Chen, X. Cao, and M. Jahazi, Strain Hardening Behavior of a Friction Stir Welded Magnesium Alloy, Scr. Mater., 2007, 57(11), p 1004–1007CrossRefGoogle Scholar
  32. 32.
    G. Hasani and R. Mahmudi, Tensile Properties of Hot Rolled Mg-3Sn-1Ca Alloy Sheets at Elevated Temperatures, Mater. Des., 2011, 32(7), p 3736–3741CrossRefGoogle Scholar
  33. 33.
    R. Mahmudi, Post-uniform Deformation in Uniaxial and Equi-Biaxial Stretching of Aluminium Alloy Sheets, J. Mater. Process. Technol., 1997, 70(1), p 93–98CrossRefGoogle Scholar
  34. 34.
    R. Mahmudi, Forming Limits in Biaxial Stretching of Aluminium Sheets and Foils, J. Mater. Process. Technol., 1993, 37(1), p 203–216CrossRefGoogle Scholar
  35. 35.
    D. Bae and A. Ghosh, Grain Size and Temperature Dependence of Superplastic Deformation in An Al-Mg Alloy Under Isostructural Condition, Acta Mater., 2000, 48(6), p 1207–1224CrossRefGoogle Scholar
  36. 36.
    D.G. Morris and M.A. Muñoz-Morris, Microstructure of Severely Deformed Al-3 Mg and its Evolution During Annealing, Acta Mater., 2002, 50(16), p 4047–4060CrossRefGoogle Scholar
  37. 37.
    E. Hosseini and M. Kazeminezhad, Integration of Physically Based Models into FE Analysis: Homogeneity of Copper Sheets Under Large Plastic Deformations, Comput. Mater. Sci., 2010, 48(1), p 166–173CrossRefGoogle Scholar
  38. 38.
    V.M. Segal, Deformation Mode and Plastic Flow in Ultra Fine Grained Metals, Mater. Sci. Eng. A, 2005, 406(1), p 205–216CrossRefGoogle Scholar
  39. 39.
    Mohamed El Aal, The Effect of the Pre-homogenization Treatment on the Fracture Characteristics and Wear Properties of ECAPed Al-Cu Alloys, Mater. Sci. Eng. A, 2012, 539, p 308–323CrossRefGoogle Scholar
  40. 40.
    A. Shokuhfar and O. Nejadseyfi, A Comparison of the Effects of Severe Plastic Deformation and Heat Treatment on the Tensile Properties and Impact Toughness of Aluminum Alloy 6061, Mater. Sci. Eng. A, 2014, 594, p 140–148CrossRefGoogle Scholar
  41. 41.
    M.V. Markushev et al., Structure and Properties of Ultra-Fine Grained Aluminium Alloys Produced by Severe Plastic Deformation, Mater. Sci. Eng. A, 1997, 234, p 927–931CrossRefGoogle Scholar
  42. 42.
    G.E. Dieter and D.J. Bacon, Mechanical Metallurgy, McGraw-Hill, New York, 1986Google Scholar
  43. 43.
    M. Mostafaei and M. Kazeminezhad, Hot Deformation Behavior of Hot Extruded Al-6 Mg Alloy, Mater. Sci. Eng. A, 2012, 535, p 216–221CrossRefGoogle Scholar
  44. 44.
    J.J. Shen, K. Ikeda, S. Hata, and H. Nakashima, Creep Mechanisms in a Fine-Grained Al-5356 Alloy at Low Stress and High Temperature, Mater. Trans., 2011, 52(10), p 1890–1898CrossRefGoogle Scholar
  45. 45.
    E.F. Dudarev, G.P. Pochivalova, YuR Kolobov, E.V. Naydenkin, and O.A. Kashin, Diffusion-Controlled True Grain-Boundary Sliding in Nanostructured Metals and Alloys, Mater. Sci. Eng. A, 2009, 503(1), p 58–61CrossRefGoogle Scholar
  46. 46.
    J. Lin, X. An, and T. Lei, Dynamic Recrystallization During Hot-Rolling in Al-6 Mg Alloy, J. Mater. Sci. Lett., 1993, 12(11), p 850–851CrossRefGoogle Scholar
  47. 47.
    C.M. Kuo, C.H. Tso, and C.H. Lin, Plastic Instability of Al-Mg Alloys During Stress Rate Change Test, J. Mater. Res., 2004, 19(01), p 31–45CrossRefGoogle Scholar

Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringSharif University of TechnologyTehranIran

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