Three-dimensional atom probe analysis of boron segregation at austenite grain boundary in a low carbon steel - Effects of boundary misorientation and quenching temperature

Goro Miyamoto; Ai Goto; Naoki Takayama; Tadashi Furuhara

doi:10.1016/j.scriptamat.2018.05.046

Three-dimensional atom probe analysis of boron segregation at austenite grain boundary in a low carbon steel - Effects of boundary misorientation and quenching temperature

Goro Miyamoto, Ai Goto, Naoki Takayama, Tadashi Furuhara

Materials Design Division

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

Segregation of boron at random austenite grain boundaries with known misorientation angle in a boron-added low carbon steel quenched from austenite state at different temperatures was investigated quantitatively using three-dimensional atom probe. Boron segregation is reduced at low angle boundaries or low quenching temperatures. The latter result indicates that non-equilibrium boron segregation plays an important role and is enhanced at higher quenching temperature due to more excess vacancies and longer diffusion distance during quenching from higher temperature.

Original language	English
Pages (from-to)	168-171
Number of pages	4
Journal	Scripta Materialia
Volume	154
DOIs	https://doi.org/10.1016/j.scriptamat.2018.05.046
Publication status	Published - 2018 Sep

Keywords

Boron
Grain boundary
Segregation
Three-dimensional atom probe

ASJC Scopus subject areas

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

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10.1016/j.scriptamat.2018.05.046

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abstract = "Segregation of boron at random austenite grain boundaries with known misorientation angle in a boron-added low carbon steel quenched from austenite state at different temperatures was investigated quantitatively using three-dimensional atom probe. Boron segregation is reduced at low angle boundaries or low quenching temperatures. The latter result indicates that non-equilibrium boron segregation plays an important role and is enhanced at higher quenching temperature due to more excess vacancies and longer diffusion distance during quenching from higher temperature.",

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journal = "Scripta Materialia",

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AU - Miyamoto, Goro

AU - Goto, Ai

AU - Takayama, Naoki

AU - Furuhara, Tadashi

PY - 2018/9

Y1 - 2018/9

N2 - Segregation of boron at random austenite grain boundaries with known misorientation angle in a boron-added low carbon steel quenched from austenite state at different temperatures was investigated quantitatively using three-dimensional atom probe. Boron segregation is reduced at low angle boundaries or low quenching temperatures. The latter result indicates that non-equilibrium boron segregation plays an important role and is enhanced at higher quenching temperature due to more excess vacancies and longer diffusion distance during quenching from higher temperature.

AB - Segregation of boron at random austenite grain boundaries with known misorientation angle in a boron-added low carbon steel quenched from austenite state at different temperatures was investigated quantitatively using three-dimensional atom probe. Boron segregation is reduced at low angle boundaries or low quenching temperatures. The latter result indicates that non-equilibrium boron segregation plays an important role and is enhanced at higher quenching temperature due to more excess vacancies and longer diffusion distance during quenching from higher temperature.

KW - Boron

KW - Grain boundary

KW - Segregation

KW - Three-dimensional atom probe

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EP - 171

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -

Three-dimensional atom probe analysis of boron segregation at austenite grain boundary in a low carbon steel - Effects of boundary misorientation and quenching temperature

Abstract

Keywords

ASJC Scopus subject areas

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