A triple-scale crystal plasticity simulation on yield behavior of annealed FCC fine-grained metals

Eisuke Kurosawa, Yoshiteru Aoyagi, Yuichi Tadano, Kazuyuki Shizawa

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

1 Citation (Scopus)

Abstract

In this study, the conventional Bailey-Hirsch's relationship is extended in order to express the increase of critical resolved shear stress due to the lack of dislocation lines in a grain. This model is introduced into a triple-scale crystal plasticity model based on geometrically necessary crystal defects and the homogenization method. A FE simulation is carried out based on the proposed model for FCC polycrystals with different grain sizes. It is numerically predicted that yield behavior of fine-grained metals depends on the initial dislocation density and the initial grain size. Furthermore, yield point drop that is observed in annealed FCC fine-grained metal can be reproduced.

Original languageEnglish
Title of host publicationMaterials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
PublisherTrans Tech Publications Ltd
Pages1027-1032
Number of pages6
ISBN (Electronic)978-0-87849-360-9
DOIs
Publication statusPublished - 2008 Jan 1
Event4th International Conference on Nanomaterials by Severe Plastic Deformation - Goslar, Germany
Duration: 2008 Aug 182008 Aug 22

Publication series

NameMaterials Science Forum
Volume584-586 PART 2
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other4th International Conference on Nanomaterials by Severe Plastic Deformation
CountryGermany
CityGoslar
Period08/8/1808/8/22

Keywords

  • Crystal plasticity
  • Geometrically necessary dislocation
  • Homogenization method
  • Size effect
  • Ultrafine-grained metal
  • Yield point drop

ASJC Scopus subject areas

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

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