Relation between oxygen activity gradient in the internal oxidation zone of Mn alloyed steel and the composition of oxide precipitates

William Mao; Willem G. Sloof

doi:10.1016/j.scriptamat.2017.03.009

Relation between oxygen activity gradient in the internal oxidation zone of Mn alloyed steel and the composition of oxide precipitates

William Mao, Willem G. Sloof

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

9 Citations (Scopus)

Abstract

An internal oxidation zone with (Mn_{1 − x},Fe_x)O mixed oxide precipitates occurs after annealing a Fe – 1.7 at.% Mn steel at 950 °C in N₂ plus 5 vol% H₂ gas mixture with dew point of 10 °C. Local thermodynamic equilibrium in the internal oxidation zone is established during annealing of the Mn alloyed steel. As a result, the composition of (Mn_{1 − x},Fe_x)O precipitates depends on the local oxygen activity. The oxygen activity decreases as a function of depth below steel surface, and consequently the concentration of Fe decreases in the (Mn_{1 − x},Fe_x)O precipitates.

Original language	English
Pages (from-to)	29-32
Journal	Scripta Materialia
Volume	135
DOIs	https://doi.org/10.1016/j.scriptamat.2017.03.009
Publication status	Published - 2017

Keywords

(Mn,Fe)O mixed oxide
Composition depth profile
Internal oxidation
Local thermodynamic equilibrium
Mn alloyed steel

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10.1016/j.scriptamat.2017.03.009

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@article{9464f690b58b41ebaa03a289a2850289,

title = "Relation between oxygen activity gradient in the internal oxidation zone of Mn alloyed steel and the composition of oxide precipitates",

abstract = "An internal oxidation zone with (Mn1 − x,Fex)O mixed oxide precipitates occurs after annealing a Fe – 1.7 at.% Mn steel at 950 °C in N2 plus 5 vol% H2 gas mixture with dew point of 10 °C. Local thermodynamic equilibrium in the internal oxidation zone is established during annealing of the Mn alloyed steel. As a result, the composition of (Mn1 − x,Fex)O precipitates depends on the local oxygen activity. The oxygen activity decreases as a function of depth below steel surface, and consequently the concentration of Fe decreases in the (Mn1 − x,Fex)O precipitates.",

keywords = "(Mn,Fe)O mixed oxide, Composition depth profile, Internal oxidation, Local thermodynamic equilibrium, Mn alloyed steel",

author = "William Mao and Sloof, {Willem G.}",

year = "2017",

doi = "10.1016/j.scriptamat.2017.03.009",

language = "English",

volume = "135",

pages = "29--32",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier",

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TY - JOUR

T1 - Relation between oxygen activity gradient in the internal oxidation zone of Mn alloyed steel and the composition of oxide precipitates

AU - Mao, William

AU - Sloof, Willem G.

PY - 2017

Y1 - 2017

N2 - An internal oxidation zone with (Mn1 − x,Fex)O mixed oxide precipitates occurs after annealing a Fe – 1.7 at.% Mn steel at 950 °C in N2 plus 5 vol% H2 gas mixture with dew point of 10 °C. Local thermodynamic equilibrium in the internal oxidation zone is established during annealing of the Mn alloyed steel. As a result, the composition of (Mn1 − x,Fex)O precipitates depends on the local oxygen activity. The oxygen activity decreases as a function of depth below steel surface, and consequently the concentration of Fe decreases in the (Mn1 − x,Fex)O precipitates.

AB - An internal oxidation zone with (Mn1 − x,Fex)O mixed oxide precipitates occurs after annealing a Fe – 1.7 at.% Mn steel at 950 °C in N2 plus 5 vol% H2 gas mixture with dew point of 10 °C. Local thermodynamic equilibrium in the internal oxidation zone is established during annealing of the Mn alloyed steel. As a result, the composition of (Mn1 − x,Fex)O precipitates depends on the local oxygen activity. The oxygen activity decreases as a function of depth below steel surface, and consequently the concentration of Fe decreases in the (Mn1 − x,Fex)O precipitates.

KW - (Mn,Fe)O mixed oxide

KW - Composition depth profile

KW - Internal oxidation

KW - Local thermodynamic equilibrium

KW - Mn alloyed steel

U2 - 10.1016/j.scriptamat.2017.03.009

DO - 10.1016/j.scriptamat.2017.03.009

M3 - Article

AN - SCOPUS:85016143035

SN - 1359-6462

VL - 135

SP - 29

EP - 32

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Relation between oxygen activity gradient in the internal oxidation zone of Mn alloyed steel and the composition of oxide precipitates

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Keywords

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