A Modeling Approach to Evaluate Grain Interaction Induced by {111}^|^lt;011^|^gt; Planar Slips in Face-centered Cubic Polycrystalline Materials

• Morita Motoaki

  Graduate School of Engineering, Yokohama National University

• Umezawa Osamu

  Faculty of Engineering, Yokohama National University

書誌事項

タイトル別名

• A Modeling Approach to Evaluate Grain Interaction Induced by {111}<011> Planar Slips in Face-centered Cubic Polycrystalline Materials
• A modeling approach to evaluate grain interaction induced by {111}<1-10> planar slips in face centered cubic polycrystalline materials

抄録

An accommodation deformation model to relax incompatibility between soft (yielded) and hard (non-yielded) grains was proposed. Dislocation arrays were installed in the soft grain to investigate the effect of secondary slips on accommodating the displacement incompatibility due to the grain interaction at the grain boundary. When a secondary slip in the soft grain is active on the same plane as the dislocation arrays, it can accommodate the displacement incompatibility in almost all orientations. However, a dislocation reflection on the primary slip plane is difficult to adopt for accommodation deformation. When the secondary slip in the soft grain is restricted to a plane without the primary slip, accommodation deformation in the soft grain does not occur. To accommodate the displacement incompatibility at the grain boundary, slip systems in the adjacent grain are required in almost all orientations. Around the orientation at which the secondary plastic deformation is the hardest to achieve, three slip systems are operating in areas of accumulation with high displacement incompatibility. Thus, the three slip systems should operate on different octahedral slip planes. However, the displacement incompatibility is not fully accommodated, and a stress field remains near the normal to {111}. The combination of sufficient stress concentration to open the grain boundary and the assembly of dislocations on the three slip systems at the grain boundary may be the cause of intergranular cracking.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 52 (6), 1153-1161, 2012

  一般社団法人 日本鉄鋼協会

キーワード

• subsurface crack initiation
• Taylor theory
• austenitic steel
• high-cycle fatigue
• stress concentration
• heterogeneous deformation
• incompatibility

詳細情報

• CRID: 1390282681464774912
• NII論文ID: 10031126814
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.52.1153
• COI: 1:CAS:528:DC%2BC38Xps12qs7k%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://hdl.handle.net/10131/8471
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/52/6/52_1153/_pdf
• 本文言語コード: en
• データソース種別:
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  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可