Metallurgical and Materials Transactions A

, Volume 44, Issue 7, pp 3211–3220 | Cite as

Cross Flow During Twist Extrusion: Theory, Experiment, and Application

  • Roman Kulagin
  • Marat I. Latypov
  • Hyoung Seop Kim
  • Victor Varyukhin
  • Yan Beygelzimer


Upon intensive investigation during the recent years, severe plastic deformation (SPD) has been commonly accepted as a strong tool for improving mechanical properties of metallic materials. The interest in commercial use of SPD materials with superior properties addresses the issue of scaling up the SPD methods. In this regard, methods that can provide SPD conditions in billets with large dimensions become of prime interest. Twist extrusion (TE) is such a process, whereby large strains are accumulated owing to repeated extrusion through a die that imposes shearing stresses. Despite a few studies of TE in the literature, many features of the process's nature remain unclear or even unknown. In the current article, we have studied an important effect of TE named “cross flow” that previously received scarce attention. By performing both experiments and simulations, we elucidated the mechanism of the cross flow as well as how it is affected by material properties and process conditions. Since practical significance of the cross flow became apparent, special attention was paid to the problem of control and reliable prediction of the cross flow. Finally, prospective applications of the investigated effect were suggested. Conclusions of the current study are anticipated to contribute to further research on simulation of other simple-shear-based SPD processes.


Friction Coefficient Severe Plastic Deformation Simple Shear Cross Flow Severe Plastic Deformation Process 
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 study was supported by the grant from the Ukraine-Korea joint research project M386-2011 funded by the State Agency for Science, Innovation and Informatization of Ukraine and joint research project (2001-0019214) funded by the National Research Foundation, Korea.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2013

Authors and Affiliations

  • Roman Kulagin
    • 1
  • Marat I. Latypov
    • 2
  • Hyoung Seop Kim
    • 2
    • 3
  • Victor Varyukhin
    • 1
  • Yan Beygelzimer
    • 1
  1. 1.Donetsk Physics & EngineeringInstitute of the National Academy of Sciences of UkraineDonetskUkraine
  2. 2.Department of Materials Science and EngineeringPOSTECHPohangRepublic of Korea
  3. 3.Center for Advanced Aerospace MaterialsPOSTECHPohangRepublic of Korea

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