Multiscale crystal plasticity simulation with pseudo-three-dimensional model on ultrafine-graining based on evolution of dislocation structures

Yoshiteru Aoyagi, Naohiro Horibe, Kazuyuki Shizawa

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

In this study, we develop a multiscale crystal plasticity model that represents evolution of dislocation structure on formation process of ultrafine-grained metal based both on dislocation patterning and geometrically necessary dislocation accumulation. A computation on the processes of ultrafine-graining, i.e., generation of dislocation cell and subgrain patterns, evolution of dense dislocation walls, its transition to micro-bands and lamellar dislocation structure and formation of subdivision surrounded by high angle boundaries, is performed by use of the present model. Dislocation patterning depending on activity of slip systems is reproduced introducing slip rate of each slip system into reaction-diffusion equations governing self-organization of dislocation structure and increasing immobilizing rate of dislocation with activation of the secondary slip system. In addition, we investigate the effect of active slip systems to the processes of fine-graining by using the pseudo-three-dimensional model with twelve slip systems of FCC metal.

本文言語English
ホスト出版物のタイトルMaterials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
出版社Trans Tech Publications Ltd
ページ1057-1062
ページ数6
ISBN(電子版)978-0-87849-360-9
DOI
出版ステータスPublished - 2008
イベント4th International Conference on Nanomaterials by Severe Plastic Deformation - Goslar, Germany
継続期間: 2008 8 182008 8 22

出版物シリーズ

名前Materials Science Forum
584-586 PART 2
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

Other4th International Conference on Nanomaterials by Severe Plastic Deformation
国/地域Germany
CityGoslar
Period08/8/1808/8/22

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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