Journal of Materials Science

, Volume 51, Issue 5, pp 2380–2393 | Cite as

Equal-channel angular pressing: influence of die design on pressure forces, strain homogeneity, and corner gap formation

  • Vitor L. SordiEmail author
  • Anibal A. Mendes Filho
  • Gustavo T. Valio
  • Phillip Springer
  • Jose B. Rubert
  • Maurizio Ferrante
Original Paper


The results of experiments directed to the optimization of Equal-channel angular pressing (ECAP) die design can be affected by the material response to deformation, thus making difficult to isolate the die performance, particularly with respect to the assessment of strain homogeneity. In the present work, a completely “inert” material was employed for the physical simulation of the ECAP deformation, thus permitting an unequivocal analysis of the die performance. Such material is the Pb–62 %Sn alloy, of which absence of strain hardening, that is, full recrystallization during or after equal-channel angular pressing, was here ascertained. As a consequence, the corner gap effect, a phenomenon known to decrease strain homogeneity, will depend only on die geometry. The study was extended to the case in which the strain distribution depends on both outer (R) and inner (r) curvature radii. Results show that the size of the corner gap is related to the deformation homogeneity of the billet, and the pressing forces are reduced for large outer radii. Emphasis was given to the quantitative measurement of the corner gap size, its relationship with the von Mises strain, and its distribution within the ECAP-processed billet, for different Rr combinations.


MoS2 Equivalent Strain Physical Simulation Channel Geometry Deformation Homogeneity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by the São Paulo State Foundation for Research Funding (FAPESP 2014/15091-4) and by the National Council of Scientific and Technological Development (CNPq449009/2014-9).

Compliance with ethical standards

Conflict of Interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2015_9547_MOESM1_ESM.docx (10 kb)
Supplementary material 1 (DOCX 10 kb)

Supplementary material 2 (WMV 9755 kb)


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Vitor L. Sordi
    • 1
    Email author
  • Anibal A. Mendes Filho
    • 1
  • Gustavo T. Valio
    • 1
  • Phillip Springer
    • 1
  • Jose B. Rubert
    • 1
  • Maurizio Ferrante
    • 1
  1. 1.Department of Materials EngineeringFederal University of São CarlosSão CarlosBrazil

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