The effect of grain boundary sliding and strain rate sensitivity on the ductility of ultrafine-grained materials

Nguyen Q. Chinh, Tamás Csanádi, Jeno Gubicza, Ruslan Z. Valiev, Boris B. Straumal, Terence G. Langdon

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

22 Citations (Scopus)

Abstract

Most ultrafine-grained (UFG) materials produced by severe plastic deformation (SPD) exibit only limited ductility which is correlated with the low strain rate sensitivity (SRS) of these materials. Recently, it was demonstrated that SPD is capable of increasing the room temperature ductility of aluminum-based alloys attaining elongations up to 150%, together with relatively high strain rate sensitivity. In the present work, additional results and discussions are presented on the effect of grain boundary sliding (GBS) and SRS on the ductility of some UFG metals and alloys. The characteristics of constitutive equations describing the steady-state deformation process are quantitatively analyzed for a better understanding of the effects of grain boundaries and strain rate sensitivity.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD5
Pages677-682
Number of pages6
DOIs
Publication statusPublished - Feb 25 2011
Event5th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD5 - Nanjing, China
Duration: Mar 21 2011Mar 25 2011

Publication series

NameMaterials Science Forum
Volume667-669
ISSN (Print)0255-5476

Other

Other5th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD5
CountryChina
CityNanjing
Period3/21/113/25/11

Keywords

  • Ductility
  • Grain boundary sliding
  • Strain rate sensitivity
  • Ultrafine-grained materials
  • Wetted boundaries

ASJC Scopus subject areas

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

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  • Cite this

    Chinh, N. Q., Csanádi, T., Gubicza, J., Valiev, R. Z., Straumal, B. B., & Langdon, T. G. (2011). The effect of grain boundary sliding and strain rate sensitivity on the ductility of ultrafine-grained materials. In Nanomaterials by Severe Plastic Deformation, NanoSPD5 (pp. 677-682). (Materials Science Forum; Vol. 667-669). https://doi.org/10.4028/www.scientific.net/MSF.667-669.677