Journal of Materials Engineering and Performance

, Volume 26, Issue 4, pp 1825–1829 | Cite as

Effect of Solid Die Equi-Channel Pressing Angle on β-Mg17Al12 Phase Morphology and Mechanical Behavior of AZ80 Mg alloy



The effects of die channel angle (Φ) in hot (~623 K) equi-channel angular pressing (ECAP) on microstructure, and tensile and compressive flow properties of AZ80 Mg alloy were investigated. Two solid ECAP dies, having Φ of (1) dual 60° and 120° in a single die and (2) 90° in another die, were designed for this purpose. Grain refinement with more than 40% reduction in average grain size along with submicron size second-phase β-precipitates was achieved after single-pass ECAP. A great variation in β-Mg17Al12 phase morphology with increasing flow stresses in tension and compression are found with decreasing value of angle Φ. There found an increasing effect on strain to failure with decrease in porosity and second-phase precipitate modification. However, there appears flow asymmetry between tension and compression with the latter exhibiting greater flow stress and strain to failure.


microstructure evolution pressing angle solid die ECAP strength asymmetry 


  1. 1.
    T.C. Lowe and R.Z. Valiev, Producing Nanoscale Microstructures Through Severe Plastic Deformation, JOM, 2000, 52(4), p 27CrossRefGoogle Scholar
  2. 2.
    M. Furukawa, Z. Horita, M. Nemoto, and T.G. Langdon, Review Processing of Metals by Equal-Channel Angular Pressing, J. Mater. Sci., 2001, 36, p 2835–2843CrossRefGoogle Scholar
  3. 3.
    V.M. Segal, Materials processing by simple shear, Mater. Sci. Eng., A, 1995, 197, p 157CrossRefGoogle Scholar
  4. 4.
    M. Mabuchi, K. Ameyama, H. Iwasaki, and K. Higashi, Low Temperature Superplasticity of AZ91 Magnesium Alloy with Non-Equilibrium Grain Boundaries, Acta Mater., 1999, 47, p 2047CrossRefGoogle Scholar
  5. 5.
    S.R. Agnew, G.M. Stoica, L.J. Chen, T.M. Lillo, J. Macheret, and P.K. Liaw, Equal Channel Angular Processing of Magnesium Alloys, TMS, 2002, p 643–652.Google Scholar
  6. 6.
    R.Z. Valiev and T.G. Langdon, Principles of Equal-Channel Angular Pressing as a Processing Tool for Grain Refinement, Prog. Mater. Sci., 2006, 51(7), p 881–981CrossRefGoogle Scholar
  7. 7.
    Y. Iwahashi, J. Wang, Z. Horita, M. Nemoto, and T.G. Langdon, Principle of Equal-Channel Angular Pressing for the Processing of Ultra-Fine Grained Materials, Scr. Mater., 1996, 35, p 143CrossRefGoogle Scholar
  8. 8.
    V.S. Rao, B.P. Kashyap, N. Prabhu, and P.D. Hodgson, T-Shaped Equi-Channel Angular Pressing of Pb–Sn Eutectic and its Tensile Properties, Mater. Sci. Eng. A, 2008, 486, p 341–349CrossRefGoogle Scholar
  9. 9.
    S. Dobatkin, Y. Estrin, V. Zakharov, T. Rostova, O. Ukolova, and A. Chirkova, Structure, Strength and Ductility of as-Cast Al-Mg-Mn-Zr-Sc Alloys After Equal Channel Angular Pressing, Mater. Sci. Forum, 2010, 633–634, p 311–319Google Scholar
  10. 10.
    J.L. Ning, D.M. Jiang, J.Z. Fan, T. Zuo, Q. Zhang, and J. Xu, Grain Refinement in as Cast Al-Mg-Mn Alloy During High Temperature Equal Channel Angular Pressing, Mater. Sci. Techn., 2009, 25(7), p 820–828CrossRefGoogle Scholar
  11. 11.
    P. Palai, N.Prabhu, P.D.Hodgson, and B.P. Kashyap, Grain Growth and β-Mg17Al12 Intermetallic Phase Dissolution During Heat Treatment and Its Impact on Deformation Behavior of AZ80 Mg-Alloy. J. Mater. Eng. Perf., 2013, p 77–82Google Scholar
  12. 12.
    M.X. Zhang and P.M. Kelly, Crystallography of Mg17Al12 Precipitates in AZ91D Alloy, Scr. Mater., 2003, 48, p 647–652CrossRefGoogle Scholar
  13. 13.
    T.H. Courtney, Mechanical Behavior of Materials, McGraw-Hill, New York, 2000, p 201Google Scholar
  14. 14.
    E.O. Hall, The Deformation and Ageing of Mild Steel: III, Discussion of Results, Proc. Phys. Soc. Lond., 1951, B64, p 747–753CrossRefGoogle Scholar
  15. 15.
    N.J. Petch, J. Iron Steel Inst., 1953, 174, p 25–28Google Scholar
  16. 16.
    C.D. Lee, Dependence of Tensile Properties of AM60 Magnesium Alloy on Microporosity and Grain Size, Mater. Sci. Eng., A, 2007, 454–455, p 575–580CrossRefGoogle Scholar
  17. 17.
    H.S. Kim, Y. Estrin, and M.B. Bush, Plastic Deformation Behaviour of Fine-Grained Materials, Acta Mater., 2000, 48, p 493–504CrossRefGoogle Scholar

Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Department of Metallurgical Engineering and Materials ScienceIndian Institute of Technology BombayMumbaiIndia
  2. 2.Tata Steel LimitedKalinganagar, JajpurIndia

Personalised recommendations