Effect of Nb and Cu on the high temperature creep properties of a high Mn-N austenitic stainless steel

Kyu Ho Lee; Jin Yoo Suh; Joo Youl Huh; Dae Bum Park; Sung Min Hong; Jae Hyeok Shim; Woo Sang Jung

doi:10.1016/j.matchar.2013.05.015

Effect of Nb and Cu on the high temperature creep properties of a high Mn-N austenitic stainless steel

Kyu Ho Lee, Jin Yoo Suh, Joo Youl Huh, Dae Bum Park, Sung Min Hong, Jae Hyeok Shim, Woo Sang Jung

Department of Materials Science and Engineering

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

14 Citations (Scopus)

Abstract

The effect of Nb and Cu addition on the creep properties of a high Mn-N austenitic stainless steel was investigated at 600 and 650 C. In the original high Mn-N steel, which was initially precipitate-free, the precipitation of M₂₃C₆ (M = Cr, Fe) and Cr₂N took place mostly on grain boudaries during creep deformation. On the other hand, the minor addition of Nb resulted in high number density of Z-phases (CrNbN) and MX (M = Nb; X = C, N) carbonitrides inside grains by combining with a high content of N, while suppressing the formation of Cr₂N. The addition of Cu gave rise to the independent precipitation of nanometer-sized metallic Cu particles. The combination of the different precipitate-forming mechanisms associated with Z-phase, MX and Cu-rich precipitates turned out to improve the creep-resistance significantly. The thermodynamics and kinetics of the precipitation were discussed using thermo-kinetic simulations.

Original language	English
Pages (from-to)	49-57
Number of pages	9
Journal	Materials Characterization
Volume	83
DOIs	https://doi.org/10.1016/j.matchar.2013.05.015
Publication status	Published - 2013

Keywords

Coarsening
Creep strength
Cu particle
High Mn-N austenitic steel
Precipitates
Z-phase

ASJC Scopus subject areas

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

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10.1016/j.matchar.2013.05.015

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@article{18186c8125f94fc983c3b9f60cd5b8a3,

title = "Effect of Nb and Cu on the high temperature creep properties of a high Mn-N austenitic stainless steel",

abstract = "The effect of Nb and Cu addition on the creep properties of a high Mn-N austenitic stainless steel was investigated at 600 and 650 C. In the original high Mn-N steel, which was initially precipitate-free, the precipitation of M23C6 (M = Cr, Fe) and Cr2N took place mostly on grain boudaries during creep deformation. On the other hand, the minor addition of Nb resulted in high number density of Z-phases (CrNbN) and MX (M = Nb; X = C, N) carbonitrides inside grains by combining with a high content of N, while suppressing the formation of Cr2N. The addition of Cu gave rise to the independent precipitation of nanometer-sized metallic Cu particles. The combination of the different precipitate-forming mechanisms associated with Z-phase, MX and Cu-rich precipitates turned out to improve the creep-resistance significantly. The thermodynamics and kinetics of the precipitation were discussed using thermo-kinetic simulations.",

keywords = "Coarsening, Creep strength, Cu particle, High Mn-N austenitic steel, Precipitates, Z-phase",

author = "Lee, {Kyu Ho} and Suh, {Jin Yoo} and Huh, {Joo Youl} and Park, {Dae Bum} and Hong, {Sung Min} and Shim, {Jae Hyeok} and Jung, {Woo Sang}",

note = "Funding Information: The authors gratefully acknowledge the financial support provided by the Korea Government Ministry of Knowledge Economy (Grant No. 2011101010004A ), Korea Institute of Science and Technology (Grant No. 2E24022 ) and POSCO .",

year = "2013",

doi = "10.1016/j.matchar.2013.05.015",

language = "English",

volume = "83",

pages = "49--57",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Effect of Nb and Cu on the high temperature creep properties of a high Mn-N austenitic stainless steel

AU - Lee, Kyu Ho

AU - Suh, Jin Yoo

AU - Huh, Joo Youl

AU - Park, Dae Bum

AU - Hong, Sung Min

AU - Shim, Jae Hyeok

AU - Jung, Woo Sang

N1 - Funding Information: The authors gratefully acknowledge the financial support provided by the Korea Government Ministry of Knowledge Economy (Grant No. 2011101010004A ), Korea Institute of Science and Technology (Grant No. 2E24022 ) and POSCO .

PY - 2013

Y1 - 2013

N2 - The effect of Nb and Cu addition on the creep properties of a high Mn-N austenitic stainless steel was investigated at 600 and 650 C. In the original high Mn-N steel, which was initially precipitate-free, the precipitation of M23C6 (M = Cr, Fe) and Cr2N took place mostly on grain boudaries during creep deformation. On the other hand, the minor addition of Nb resulted in high number density of Z-phases (CrNbN) and MX (M = Nb; X = C, N) carbonitrides inside grains by combining with a high content of N, while suppressing the formation of Cr2N. The addition of Cu gave rise to the independent precipitation of nanometer-sized metallic Cu particles. The combination of the different precipitate-forming mechanisms associated with Z-phase, MX and Cu-rich precipitates turned out to improve the creep-resistance significantly. The thermodynamics and kinetics of the precipitation were discussed using thermo-kinetic simulations.

AB - The effect of Nb and Cu addition on the creep properties of a high Mn-N austenitic stainless steel was investigated at 600 and 650 C. In the original high Mn-N steel, which was initially precipitate-free, the precipitation of M23C6 (M = Cr, Fe) and Cr2N took place mostly on grain boudaries during creep deformation. On the other hand, the minor addition of Nb resulted in high number density of Z-phases (CrNbN) and MX (M = Nb; X = C, N) carbonitrides inside grains by combining with a high content of N, while suppressing the formation of Cr2N. The addition of Cu gave rise to the independent precipitation of nanometer-sized metallic Cu particles. The combination of the different precipitate-forming mechanisms associated with Z-phase, MX and Cu-rich precipitates turned out to improve the creep-resistance significantly. The thermodynamics and kinetics of the precipitation were discussed using thermo-kinetic simulations.

KW - Coarsening

KW - Creep strength

KW - Cu particle

KW - High Mn-N austenitic steel

KW - Precipitates

KW - Z-phase

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U2 - 10.1016/j.matchar.2013.05.015

DO - 10.1016/j.matchar.2013.05.015

M3 - Article

AN - SCOPUS:84879959988

SN - 1044-5803

VL - 83

SP - 49

EP - 57

JO - Materials Characterization

JF - Materials Characterization

ER -

Effect of Nb and Cu on the high temperature creep properties of a high Mn-N austenitic stainless steel

Abstract

Keywords

ASJC Scopus subject areas

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