Limit of dislocation density and dislocation strengthening in iron

K. Nakashima, M. Suzuki, Y. Futamura, T. Tsuchiyama, S. Takaki

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

32 被引用数 (Scopus)

抄録

The limit of dislocation density was investigated by means of mechanical milling (MM) treatment of an iron powder. Mechanical milling enabled an ultimate severe deformation of iron powder particles and dislocation density in the MM iron powder showed the clear saturation at around the value of 10 16m-2. On the other hand, the relation between hardness and dislocation density was examined in cold-rolled iron sheets, and the linear Bailey-Hirsch relationship; HV[GPa]=0.7+3×10 -8ρ1/2 was obtained in the dislocation density region up to 3×1015m-2. Extrapolation of the Bailey-Hirsch relationship indicated that the dislocation strengthening should be limited to about 3.7GPa in Vickers hardness which corresponds to about 1.1 GPa in 0.2% proof stress.

本文言語英語
ホスト出版物のタイトルNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
出版社Trans Tech Publications Ltd
ページ627-632
ページ数6
ISBN(印刷版)0878499857, 9780878499854
DOI
出版ステータス出版済み - 2006
イベント3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, 日本
継続期間: 9 22 20059 26 2005

出版物シリーズ

名前Materials Science Forum
503-504
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

その他

その他3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
Country日本
CityFukuoka
Period9/22/059/26/05

All Science Journal Classification (ASJC) codes

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

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