Principles of high-pressure torsion and equal-channel angular pressing: A comparison of microstructural characteristics

Alexandre P. Zhilyaev, Cheng Xu, Minoru Furukawa, Zenji Horita, Terence G. Langdon

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)


    Two major procedures are currently in use for the production of ultrafme-grained materials through the imposition of severe plastic deformation: high-pressure torsion (HPT) in which a sample is subjected to a high pressure with concomitant torsional straining and equal-channel angular pressing (ECAP) where a sample is pressed through a die constrained within a channel that is bent through an abrupt angle. In both of these procedures, the samples are subjected to very high strains but there is no reduction in their cross-sectional dimensions. This paper examines the principles of these two processing techniques with special reference to the production of materials having reasonably homogeneous microstructures and the potential for developing an array of ultrafine grains separated by grain boundaries having high angles of misorientation.

    Original languageEnglish
    Title of host publicationUltrafine Grained Materials III
    EditorsY.T. Zhu, T.G. Langdon, R.Z. Valiev, S. Lee Semiatin, al et al
    Number of pages6
    Publication statusPublished - Jul 14 2004
    EventUltrafine Grained Materials III - Charlotte, NC., United States
    Duration: Mar 14 2004Mar 18 2004

    Publication series

    NameUltrafine Grained Materials III


    OtherUltrafine Grained Materials III
    Country/TerritoryUnited States
    CityCharlotte, NC.

    All Science Journal Classification (ASJC) codes

    • General Engineering


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