Limit of dislocation density and dislocation strengthening in iron

K. Nakashima, M. Suzuki, Y. Futamura, Toshihiro Tsuchiyma, Setsuo Takaki

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

26 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
Pages627-632
Number of pages6
Publication statusPublished - Dec 1 2006
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: Sep 22 2005Sep 26 2005

Publication series

NameMaterials Science Forum
Volume503-504
ISSN (Print)0255-5476

Other

Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
CountryJapan
CityFukuoka
Period9/22/059/26/05

Fingerprint

Iron powder
Strengthening (metal)
Iron
iron
Vickers hardness
Extrapolation
Hardness
extrapolation
hardness
saturation

All Science Journal Classification (ASJC) codes

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

Cite this

Nakashima, K., Suzuki, M., Futamura, Y., Tsuchiyma, T., & Takaki, S. (2006). Limit of dislocation density and dislocation strengthening in iron. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation (pp. 627-632). (Materials Science Forum; Vol. 503-504).

Limit of dislocation density and dislocation strengthening in iron. / Nakashima, K.; Suzuki, M.; Futamura, Y.; Tsuchiyma, Toshihiro; Takaki, Setsuo.

Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. 2006. p. 627-632 (Materials Science Forum; Vol. 503-504).

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

Nakashima, K, Suzuki, M, Futamura, Y, Tsuchiyma, T & Takaki, S 2006, Limit of dislocation density and dislocation strengthening in iron. in Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. Materials Science Forum, vol. 503-504, pp. 627-632, 3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3, Fukuoka, Japan, 9/22/05.
Nakashima K, Suzuki M, Futamura Y, Tsuchiyma T, Takaki S. Limit of dislocation density and dislocation strengthening in iron. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. 2006. p. 627-632. (Materials Science Forum).
Nakashima, K. ; Suzuki, M. ; Futamura, Y. ; Tsuchiyma, Toshihiro ; Takaki, Setsuo. / Limit of dislocation density and dislocation strengthening in iron. Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. 2006. pp. 627-632 (Materials Science Forum).
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