Limit of dislocation density and dislocation strengthening in iron

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

doi:10.4028/0-87849-985-7.627

Limit of dislocation density and dislocation strengthening in iron

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

44 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 ^-8ρ^1/2 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 language	English
Title of host publication	Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
Publisher	Trans Tech Publications Ltd
Pages	627-632
Number of pages	6
ISBN (Print)	0878499857, 9780878499854
DOIs	https://doi.org/10.4028/0-87849-985-7.627
Publication status	Published - 2006
Event	3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan Duration: Sept 22 2005 → Sept 26 2005

Publication series

Name	Materials Science Forum
Volume	503-504
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Other

Other	3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
Country/Territory	Japan
City	Fukuoka
Period	9/22/05 → 9/26/05

All Science Journal Classification (ASJC) codes

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

Access to Document

10.4028/0-87849-985-7.627

Cite this

Nakashima, K., Suzuki, M., Futamura, Y., Tsuchiyama, 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). Trans Tech Publications Ltd. https://doi.org/10.4028/0-87849-985-7.627

Limit of dislocation density and dislocation strengthening in iron. / Nakashima, K.; Suzuki, M.; Futamura, Y. et al.
Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. Trans Tech Publications Ltd, 2006. p. 627-632 (Materials Science Forum; Vol. 503-504).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Nakashima, K, Suzuki, M, Futamura, Y, Tsuchiyama, 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, Trans Tech Publications Ltd, pp. 627-632, 3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3, Fukuoka, Japan, 9/22/05. https://doi.org/10.4028/0-87849-985-7.627

Nakashima K, Suzuki M, Futamura Y, Tsuchiyama 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. Trans Tech Publications Ltd. 2006. p. 627-632. (Materials Science Forum). doi: 10.4028/0-87849-985-7.627

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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.",

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AB - 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.

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Limit of dislocation density and dislocation strengthening in iron

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