Effect of grain size on the yield stress of cold worked iron

Yuki Tanaka, Setsuo Takaki, Toshihiro Tsuchiyama, Ryuji Uemori

研究成果: ジャーナルへの寄稿記事

4 引用 (Scopus)

抄録

Effect of ferrite grain size on dislocation strengthening was investigated in low carbon steels (0.006%C-0.15%C) with various grain sizes from 1 to 100 μm. In specimens with slight deformation, dislocation density increases in proportion to the inverse of ferrite grain size. In the dislocation density range below 2×1014/m2, dislocation density increases linearly against deformation strain but it tends to level off due to the dynamic recovery of dislocations when dislocation density has exceeded it. On the other hand, tensile tests revealed that yield stress follows the Hall-Petch relation for as-annealed specimens but follows the Bailey-Hirsch relation for cold rolled specimens. This means that flow stress depends on only the dislocation density regardless of grain size. As a result, it was concluded that the introduction of dislocations has been promoted with decreasing ferrite grain size and this results in the increase of flow stress in the uniform deformation region.

元の言語英語
ページ(範囲)284-291
ページ数8
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
104
発行部数5
DOI
出版物ステータス出版済み - 5 2018

Fingerprint

Yield stress
Ferrite
Iron
grain size
Plastic flow
iron
Strengthening (metal)
Low carbon steel
ferrites
Recovery
low carbon steels
tensile tests
proportion
recovery

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

これを引用

Effect of grain size on the yield stress of cold worked iron. / Tanaka, Yuki; Takaki, Setsuo; Tsuchiyama, Toshihiro; Uemori, Ryuji.

:: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 巻 104, 番号 5, 05.2018, p. 284-291.

研究成果: ジャーナルへの寄稿記事

@article{0c3c08e659364b00a7a9d00648e6e24d,
title = "Effect of grain size on the yield stress of cold worked iron",
abstract = "Effect of ferrite grain size on dislocation strengthening was investigated in low carbon steels (0.006{\%}C-0.15{\%}C) with various grain sizes from 1 to 100 μm. In specimens with slight deformation, dislocation density increases in proportion to the inverse of ferrite grain size. In the dislocation density range below 2×1014/m2, dislocation density increases linearly against deformation strain but it tends to level off due to the dynamic recovery of dislocations when dislocation density has exceeded it. On the other hand, tensile tests revealed that yield stress follows the Hall-Petch relation for as-annealed specimens but follows the Bailey-Hirsch relation for cold rolled specimens. This means that flow stress depends on only the dislocation density regardless of grain size. As a result, it was concluded that the introduction of dislocations has been promoted with decreasing ferrite grain size and this results in the increase of flow stress in the uniform deformation region.",
author = "Yuki Tanaka and Setsuo Takaki and Toshihiro Tsuchiyama and Ryuji Uemori",
year = "2018",
month = "5",
doi = "10.2355/tetsutohagane.TETSU-2017-091",
language = "English",
volume = "104",
pages = "284--291",
journal = "Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan",
issn = "0021-1575",
publisher = "一般社団法人 日本鉄鋼協会",
number = "5",

}

TY - JOUR

T1 - Effect of grain size on the yield stress of cold worked iron

AU - Tanaka, Yuki

AU - Takaki, Setsuo

AU - Tsuchiyama, Toshihiro

AU - Uemori, Ryuji

PY - 2018/5

Y1 - 2018/5

N2 - Effect of ferrite grain size on dislocation strengthening was investigated in low carbon steels (0.006%C-0.15%C) with various grain sizes from 1 to 100 μm. In specimens with slight deformation, dislocation density increases in proportion to the inverse of ferrite grain size. In the dislocation density range below 2×1014/m2, dislocation density increases linearly against deformation strain but it tends to level off due to the dynamic recovery of dislocations when dislocation density has exceeded it. On the other hand, tensile tests revealed that yield stress follows the Hall-Petch relation for as-annealed specimens but follows the Bailey-Hirsch relation for cold rolled specimens. This means that flow stress depends on only the dislocation density regardless of grain size. As a result, it was concluded that the introduction of dislocations has been promoted with decreasing ferrite grain size and this results in the increase of flow stress in the uniform deformation region.

AB - Effect of ferrite grain size on dislocation strengthening was investigated in low carbon steels (0.006%C-0.15%C) with various grain sizes from 1 to 100 μm. In specimens with slight deformation, dislocation density increases in proportion to the inverse of ferrite grain size. In the dislocation density range below 2×1014/m2, dislocation density increases linearly against deformation strain but it tends to level off due to the dynamic recovery of dislocations when dislocation density has exceeded it. On the other hand, tensile tests revealed that yield stress follows the Hall-Petch relation for as-annealed specimens but follows the Bailey-Hirsch relation for cold rolled specimens. This means that flow stress depends on only the dislocation density regardless of grain size. As a result, it was concluded that the introduction of dislocations has been promoted with decreasing ferrite grain size and this results in the increase of flow stress in the uniform deformation region.

UR - http://www.scopus.com/inward/record.url?scp=85046684191&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046684191&partnerID=8YFLogxK

U2 - 10.2355/tetsutohagane.TETSU-2017-091

DO - 10.2355/tetsutohagane.TETSU-2017-091

M3 - Article

AN - SCOPUS:85046684191

VL - 104

SP - 284

EP - 291

JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

SN - 0021-1575

IS - 5

ER -