Difference between carbon and nitrogen in thermal stability of metastable 18%Cr-8%Ni austenite

Takuro Masumura, Toshihiro Tsuchiyma, Setsuo Takaki, Tamotsu Koyano, Kazuhiko Adachi

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

The effects of carbon and nitrogen addition on the athermal α′-martensitic transformation in metastable 18%Cr-8%Ni austenite are investigated. The thermal stability of austenite in nitrogen-added steel is higher than that in carbon-added steel, and the difference between the effects of carbon and nitrogen addition becomes remarkable as the amount of both elements increases. As the two-step transformation (γ → ε → α′) always occurs in metastable 18%Cr-8%Ni austenite, the suppression of ε-martensite results in the thermal stabilization of austenite. Nitrogen is more effective than carbon for increasing the stacking fault energy, leading to a higher thermal stability of the nitrogen-bearing 18%Cr-8%Ni steels.

元の言語英語
ページ(範囲)8-11
ページ数4
ジャーナルScripta Materialia
154
DOI
出版物ステータス出版済み - 9 1 2018

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austenite
Austenite
Thermodynamic stability
thermal stability
Nitrogen
Carbon
nitrogen
carbon
Steel
Bearings (structural)
steels
stacking fault energy
carbon steels
Martensitic transformations
martensitic transformation
Stacking faults
martensite
Martensite
Carbon steel
Stabilization

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

これを引用

Difference between carbon and nitrogen in thermal stability of metastable 18%Cr-8%Ni austenite. / Masumura, Takuro; Tsuchiyma, Toshihiro; Takaki, Setsuo; Koyano, Tamotsu; Adachi, Kazuhiko.

:: Scripta Materialia, 巻 154, 01.09.2018, p. 8-11.

研究成果: ジャーナルへの寄稿記事

Masumura, Takuro ; Tsuchiyma, Toshihiro ; Takaki, Setsuo ; Koyano, Tamotsu ; Adachi, Kazuhiko. / Difference between carbon and nitrogen in thermal stability of metastable 18%Cr-8%Ni austenite. :: Scripta Materialia. 2018 ; 巻 154. pp. 8-11.
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abstract = "The effects of carbon and nitrogen addition on the athermal α′-martensitic transformation in metastable 18{\%}Cr-8{\%}Ni austenite are investigated. The thermal stability of austenite in nitrogen-added steel is higher than that in carbon-added steel, and the difference between the effects of carbon and nitrogen addition becomes remarkable as the amount of both elements increases. As the two-step transformation (γ → ε → α′) always occurs in metastable 18{\%}Cr-8{\%}Ni austenite, the suppression of ε-martensite results in the thermal stabilization of austenite. Nitrogen is more effective than carbon for increasing the stacking fault energy, leading to a higher thermal stability of the nitrogen-bearing 18{\%}Cr-8{\%}Ni steels.",
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AU - Koyano, Tamotsu

AU - Adachi, Kazuhiko

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AB - The effects of carbon and nitrogen addition on the athermal α′-martensitic transformation in metastable 18%Cr-8%Ni austenite are investigated. The thermal stability of austenite in nitrogen-added steel is higher than that in carbon-added steel, and the difference between the effects of carbon and nitrogen addition becomes remarkable as the amount of both elements increases. As the two-step transformation (γ → ε → α′) always occurs in metastable 18%Cr-8%Ni austenite, the suppression of ε-martensite results in the thermal stabilization of austenite. Nitrogen is more effective than carbon for increasing the stacking fault energy, leading to a higher thermal stability of the nitrogen-bearing 18%Cr-8%Ni steels.

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