Evolution of dislocation patterns in a tricrystal model subjected to cyclic loading

• Ohashi, Tetsuya

• Kondou, Ryouji

抄録

When a polycrystalline aggregate is deformed beyond the elastic range, dislocations pile up at grain boundaries and make some patterned structures within the grains. If the external load is reversed, most dislocations at grain boundaries and in the patterned structure are supposed to disappear or change their arrangements, but the details are not yet well known. In this study, we examined such changes in dislocation structures by a crystal plasticity analysis. Models for the polycrystalline aggregates consist of three grains and the generation and degeneration of the geometrically necessary dislocations during cyclic loading are examined in detail. The results show that there are some groups of dislocations that do not dissipate but evolve upon reverse loading.

収録刊行物

• Philosophical Magazine

  Philosophical Magazine 93 (4), 366-387, 2013

  Taylor & Francis

キーワード

• polycrystalline aggregate
• dislocation pattern
• crystal plasticity analysis
• grain boundary
• cyclic deformation
• tricrystal model

詳細情報

• CRID: 1050845763738284032
• NII論文ID: 120005649771
• Web Site: https://kitami-it.repo.nii.ac.jp/records/7910
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles