Microstructure of plasma nitrided AISI420 martensitic stainless steel at 673 K

Tatsuhiko Aizawa, Tomoaki Yoshino, Kazuo Morikawa, Shouichirou Yoshihara

研究成果: Article

1 引用 (Scopus)

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Martensitic stainless steel type AISI420 was plasma nitrided at 673 K for 3.6 ks to investigate the initial stage of the nitrogen supersaturation process without the formation of iron and chromium nitrides. SEM-EDX, electron back-scattering diffraction (EBSD), and TEM analyses were utilized to characterize the microstructure of the nitrided layer across the nitriding front end. The original coarse-grained, fully martensitic microstructure turned to be α’-γ two phase and fine-grained by high nitrogen concentration. Below this homogeneously nitrided layer, α’-grains were modified in geometry to be aligned along the plastic slip lines together with the α’ to γ-phase transformation at these highly strained zones. Most of these α’-grains in the two-phase microstructure had a nano-laminated structure with the width of 50 nm.

元の言語English
記事番号60
ジャーナルCrystals
9
発行部数2
DOI
出版物ステータスPublished - 2019 2 1

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martensitic stainless steels
Martensitic stainless steel
Plasmas
microstructure
Microstructure
Nitrogen
nitrogen
nitriding
Nitriding
Supersaturation
Chromium
supersaturation
Nitrides
nitrides
phase transformations
Energy dispersive spectroscopy
chromium
slip
plastics
Iron

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

これを引用

Microstructure of plasma nitrided AISI420 martensitic stainless steel at 673 K. / Aizawa, Tatsuhiko; Yoshino, Tomoaki; Morikawa, Kazuo; Yoshihara, Shouichirou.

:: Crystals, 巻 9, 番号 2, 60, 01.02.2019.

研究成果: Article

Aizawa, Tatsuhiko ; Yoshino, Tomoaki ; Morikawa, Kazuo ; Yoshihara, Shouichirou. / Microstructure of plasma nitrided AISI420 martensitic stainless steel at 673 K. :: Crystals. 2019 ; 巻 9, 番号 2.
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abstract = "Martensitic stainless steel type AISI420 was plasma nitrided at 673 K for 3.6 ks to investigate the initial stage of the nitrogen supersaturation process without the formation of iron and chromium nitrides. SEM-EDX, electron back-scattering diffraction (EBSD), and TEM analyses were utilized to characterize the microstructure of the nitrided layer across the nitriding front end. The original coarse-grained, fully martensitic microstructure turned to be α’-γ two phase and fine-grained by high nitrogen concentration. Below this homogeneously nitrided layer, α’-grains were modified in geometry to be aligned along the plastic slip lines together with the α’ to γ-phase transformation at these highly strained zones. Most of these α’-grains in the two-phase microstructure had a nano-laminated structure with the width of 50 nm.",
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AB - Martensitic stainless steel type AISI420 was plasma nitrided at 673 K for 3.6 ks to investigate the initial stage of the nitrogen supersaturation process without the formation of iron and chromium nitrides. SEM-EDX, electron back-scattering diffraction (EBSD), and TEM analyses were utilized to characterize the microstructure of the nitrided layer across the nitriding front end. The original coarse-grained, fully martensitic microstructure turned to be α’-γ two phase and fine-grained by high nitrogen concentration. Below this homogeneously nitrided layer, α’-grains were modified in geometry to be aligned along the plastic slip lines together with the α’ to γ-phase transformation at these highly strained zones. Most of these α’-grains in the two-phase microstructure had a nano-laminated structure with the width of 50 nm.

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KW - Nitrogen supersaturation

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