Quantitative analysis of grain boundaries in carbon- and nitrogen-added ferritic steels by atom probe tomography

Jun Takahashi, Kazuto Kawakami, Kohsaku Ushioda, Setsuo Takaki, Nobuo Nakata, Toshihiro Tsuchiyma

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Recent reports state that solute carbon increases the Hall-Petch coefficient in ferritic steel through grain boundary segregation, whereas solute nitrogen has hardly any affect. Atom probe analysis of grain boundaries was performed to investigate why nitrogen has negligible influence. Nitrogen segregation at the boundary was clearly observed with a similar amount of carbon segregation in ferritic steel containing 5C-54 N (mass ppm). Quantitative estimation of the coefficient increment per unit interfacial excess implies that grain boundary segregation of nitrogen barely influences the Hall-Petch coefficient.

Original languageEnglish
Pages (from-to)207-210
Number of pages4
JournalScripta Materialia
Volume66
Issue number5
DOIs
Publication statusPublished - Mar 1 2012

Fingerprint

Ferritic steel
quantitative analysis
Tomography
Grain boundaries
Nitrogen
Carbon
grain boundaries
tomography
steels
nitrogen
Atoms
probes
carbon
Chemical analysis
atoms
Hall effect
solutes
coefficients

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Quantitative analysis of grain boundaries in carbon- and nitrogen-added ferritic steels by atom probe tomography. / Takahashi, Jun; Kawakami, Kazuto; Ushioda, Kohsaku; Takaki, Setsuo; Nakata, Nobuo; Tsuchiyma, Toshihiro.

In: Scripta Materialia, Vol. 66, No. 5, 01.03.2012, p. 207-210.

Research output: Contribution to journalArticle

Takahashi, Jun ; Kawakami, Kazuto ; Ushioda, Kohsaku ; Takaki, Setsuo ; Nakata, Nobuo ; Tsuchiyma, Toshihiro. / Quantitative analysis of grain boundaries in carbon- and nitrogen-added ferritic steels by atom probe tomography. In: Scripta Materialia. 2012 ; Vol. 66, No. 5. pp. 207-210.
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