Modeling and simulation of crystal plasticity based on GN crystal defects for ultrafine-grained metals induced by severe plastic deformation

Shingo Oishi, Yoshiteru Aoyagi, Kazuyuki Shizawa

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

Abstract

In this study, we apply the densities of geometrically necessary (GN) crystal defects, i.e., GN dislocation and GN incompatibility considering dynamic recovery to tile hardening law of a crystal in order to express almost crystal defects as geometrical quantities. Moreover, the quantitative confirmation process of the generations of subdivisions is proposed, and the information of induced grain is introduced into the strain rate sensitivity. A dislocation-crystal plasticity FE simulation is carried out for large deformation of an FCC polycrystal under plane strain condition. Distributions of crystal defects and crystal orientation in a specimen are visualized and the separation of grains is discussed on the basis of the results obtained here.

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
Pages215-220
Number of pages6
ISBN (Print)0878499857, 9780878499854
DOIs
Publication statusPublished - 2006 Jan 1
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: 2005 Sep 222005 Sep 26

Publication series

NameMaterials Science Forum
Volume503-504
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
CountryJapan
CityFukuoka
Period05/9/2205/9/26

Keywords

  • Crystal plasticity
  • Dynamic recovery
  • Geometrically necessary dislocation density
  • Grain boundary
  • Incompatibility
  • Multiscale modeling
  • Subdivision

ASJC Scopus subject areas

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

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  • Cite this

    Oishi, S., Aoyagi, Y., & Shizawa, K. (2006). Modeling and simulation of crystal plasticity based on GN crystal defects for ultrafine-grained metals induced by severe plastic deformation. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation (pp. 215-220). (Materials Science Forum; Vol. 503-504). Trans Tech Publications Ltd. https://doi.org/10.4028/0-87849-985-7.215