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)

Abstract

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
Pages75-80
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

Other

OtherUltrafine Grained Materials III
CountryUnited States
CityCharlotte, NC.
Period3/14/043/18/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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