Effect of Mn addition on a brittle-to-ductile transition in ferritic steels

Masaki Tanaka, Keiki Maeno, Nobuyuki Yoshimura, Manabu Hoshino, Ryuji Uemori, Kohsaku Ushioda, Kenji Higashida

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

The effect of Mn addition on a brittle-to-ductile transition (BDT) in Ti added ultra-low carbon steels was investigated comparing with the effect of Ni on it. The effects of Mn on the temperature dependences of 0.2 % proof stress, activation volume and effective stress in Ti added ultra-low carbon steels were nearly the same as those of Ni. The decrease in the activation energy of dislocation glide with Mn content was also nearly the same amount as that with Ni, indicating that dislocation mobility relating to thermally activated process was increased with Mn addition. The temperature dependence of absorbed impact energy showed that the BDT temperature increases with the Mn content. The fraction of inter-granular fracture surface increased with Mn content suggesting that Mn decreases the surface energy for inter-granular fracture, which controls the BDT temperature. Those results suggest that Mn has a potential to improve low temperature toughness when grain boundaries are strengthened enough. The effect of Mn addition on the temperature dependence of absorbed fracture energy in no Ti-added ultra-low carbon steels was also presented.

元の言語英語
ページ(範囲)1267-1273
ページ数7
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
100
発行部数10
DOI
出版物ステータス出版済み - 1 1 2014

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Ferritic steel
low carbon steels
Low carbon steel
steels
temperature dependence
Superconducting transition temperature
transition temperature
Temperature
Fracture energy
toughness
Interfacial energy
Toughness
surface energy
Grain boundaries
grain boundaries
Activation energy
Chemical activation
activation
activation energy
energy

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 Mn addition on a brittle-to-ductile transition in ferritic steels. / Tanaka, Masaki; Maeno, Keiki; Yoshimura, Nobuyuki; Hoshino, Manabu; Uemori, Ryuji; Ushioda, Kohsaku; Higashida, Kenji.

:: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 巻 100, 番号 10, 01.01.2014, p. 1267-1273.

研究成果: ジャーナルへの寄稿記事

Tanaka, Masaki ; Maeno, Keiki ; Yoshimura, Nobuyuki ; Hoshino, Manabu ; Uemori, Ryuji ; Ushioda, Kohsaku ; Higashida, Kenji. / Effect of Mn addition on a brittle-to-ductile transition in ferritic steels. :: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 2014 ; 巻 100, 番号 10. pp. 1267-1273.
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abstract = "The effect of Mn addition on a brittle-to-ductile transition (BDT) in Ti added ultra-low carbon steels was investigated comparing with the effect of Ni on it. The effects of Mn on the temperature dependences of 0.2 {\%} proof stress, activation volume and effective stress in Ti added ultra-low carbon steels were nearly the same as those of Ni. The decrease in the activation energy of dislocation glide with Mn content was also nearly the same amount as that with Ni, indicating that dislocation mobility relating to thermally activated process was increased with Mn addition. The temperature dependence of absorbed impact energy showed that the BDT temperature increases with the Mn content. The fraction of inter-granular fracture surface increased with Mn content suggesting that Mn decreases the surface energy for inter-granular fracture, which controls the BDT temperature. Those results suggest that Mn has a potential to improve low temperature toughness when grain boundaries are strengthened enough. The effect of Mn addition on the temperature dependence of absorbed fracture energy in no Ti-added ultra-low carbon steels was also presented.",
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AU - Uemori, Ryuji

AU - Ushioda, Kohsaku

AU - Higashida, Kenji

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AB - The effect of Mn addition on a brittle-to-ductile transition (BDT) in Ti added ultra-low carbon steels was investigated comparing with the effect of Ni on it. The effects of Mn on the temperature dependences of 0.2 % proof stress, activation volume and effective stress in Ti added ultra-low carbon steels were nearly the same as those of Ni. The decrease in the activation energy of dislocation glide with Mn content was also nearly the same amount as that with Ni, indicating that dislocation mobility relating to thermally activated process was increased with Mn addition. The temperature dependence of absorbed impact energy showed that the BDT temperature increases with the Mn content. The fraction of inter-granular fracture surface increased with Mn content suggesting that Mn decreases the surface energy for inter-granular fracture, which controls the BDT temperature. Those results suggest that Mn has a potential to improve low temperature toughness when grain boundaries are strengthened enough. The effect of Mn addition on the temperature dependence of absorbed fracture energy in no Ti-added ultra-low carbon steels was also presented.

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