Gradient structure formation by severe plastic deformation

M. Danylenko, V. Gorban, Yu Podrezov, S. Firstov, O. Rosenberg, S. Shejkin, F. Morito, Y. Yamabe-Mitarai

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

4 Citations (Scopus)


Severe plastic deformation (SPD) techniques are the best for producing of massive nanostructured materials. The methods of equal channel angular pressure (ECAP) and twist extrusion (TE) are realized by simple shear uniform deformation without change of cross-section sizes of sample. In the case of roll forming (RF) the shear strain is localized in the near-surface layer of metal. Intensity of shear strain in the near-surface layer depends on variation of parameters of deformation and conditions of friction in a contact. Steel 65G (0.65C, 0.3Si, 0.6Mn, 0.3Cr, and 0.3Ni) was deformed by roll forming. Transmission electron microscopy (TEM) of "cross-section" samples was used for studying of gradient structure of deformed material. TEM investigation shown that cell substructure in a near-surface layer have been formed. The depth of deformed layer is approximately 40 micrometers. Average cell size in cross-section direction is about 100 - 200 nm. Thin nanostracture layer with cell size about 20-30 nm was detected. In our opinion such substructure formed due to effect of "good" impurities.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
PublisherTrans Tech Publications Ltd
Number of pages6
ISBN (Print)0878499857, 9780878499854
Publication statusPublished - 2006
Externally publishedYes
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: 2005 Sep 222005 Sep 26

Publication series

NameMaterials Science Forum
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3


  • Microhardness
  • Roll forming
  • Severe plastic deformation
  • TEM "cross-section"
  • True hardness

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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