Precipitation characteristics of the second phases in high-nitrogen austenitic 18Cr-18Mn-2Mo-0.9N steel during isothermal aging

Tae Ho Lee; Chang Seok Oh; Chang Gil Lee; Sung Joon Kim; Setsuo Takaki

Precipitation characteristics of the second phases in high-nitrogen austenitic 18Cr-18Mn-2Mo-0.9N steel during isothermal aging

Tae Ho Lee, Chang Seok Oh, Chang Gil Lee, Sung Joon Kim, Setsuo Takaki

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

Abstract

Precipitation characteristics of the second phases and crystallographic features of Cr₂N precipitates in high-nitrogen austenitic Fe-18Cr-18Mn-2Mo-0.9N (all in weight percent) alloy were investigated utilizing scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The precipitation sequence of Cr₂N was found to be intergranular, cellular, and intragranular precipitation with aging time. On prolonged aging, coarse sigma (σ) phase with bct structure precipitated along cell and grain boundaries. Based on analyses of both SAD patterns and computer simulations of them, the crystal structure of Cr₂N was confirmed to be trigonal, and the orientation relationship with γ can be expressed as [011]_γ//[̄1100]_Cr2N and (1̄11) _γ//(0001)_Cr2N.

Original language	English
Pages (from-to)	231-236
Number of pages	6
Journal	Metals and Materials International
Volume	10
Issue number	3
Publication status	Published - Jun 1 2004

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Cite this

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title = "Precipitation characteristics of the second phases in high-nitrogen austenitic 18Cr-18Mn-2Mo-0.9N steel during isothermal aging",

abstract = "Precipitation characteristics of the second phases and crystallographic features of Cr2N precipitates in high-nitrogen austenitic Fe-18Cr-18Mn-2Mo-0.9N (all in weight percent) alloy were investigated utilizing scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The precipitation sequence of Cr2N was found to be intergranular, cellular, and intragranular precipitation with aging time. On prolonged aging, coarse sigma (σ) phase with bct structure precipitated along cell and grain boundaries. Based on analyses of both SAD patterns and computer simulations of them, the crystal structure of Cr2N was confirmed to be trigonal, and the orientation relationship with γ can be expressed as [011]γ//{\=[}1100]Cr2N and ({\=1}11) γ//(0001)Cr2N.",

author = "Lee, {Tae Ho} and Oh, {Chang Seok} and Lee, {Chang Gil} and Kim, {Sung Joon} and Setsuo Takaki",

year = "2004",

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language = "English",

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journal = "Metals and Materials International",

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T1 - Precipitation characteristics of the second phases in high-nitrogen austenitic 18Cr-18Mn-2Mo-0.9N steel during isothermal aging

AU - Lee, Tae Ho

AU - Oh, Chang Seok

AU - Lee, Chang Gil

AU - Kim, Sung Joon

AU - Takaki, Setsuo

PY - 2004/6/1

Y1 - 2004/6/1

N2 - Precipitation characteristics of the second phases and crystallographic features of Cr2N precipitates in high-nitrogen austenitic Fe-18Cr-18Mn-2Mo-0.9N (all in weight percent) alloy were investigated utilizing scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The precipitation sequence of Cr2N was found to be intergranular, cellular, and intragranular precipitation with aging time. On prolonged aging, coarse sigma (σ) phase with bct structure precipitated along cell and grain boundaries. Based on analyses of both SAD patterns and computer simulations of them, the crystal structure of Cr2N was confirmed to be trigonal, and the orientation relationship with γ can be expressed as [011]γ//[̄1100]Cr2N and (1̄11) γ//(0001)Cr2N.

AB - Precipitation characteristics of the second phases and crystallographic features of Cr2N precipitates in high-nitrogen austenitic Fe-18Cr-18Mn-2Mo-0.9N (all in weight percent) alloy were investigated utilizing scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The precipitation sequence of Cr2N was found to be intergranular, cellular, and intragranular precipitation with aging time. On prolonged aging, coarse sigma (σ) phase with bct structure precipitated along cell and grain boundaries. Based on analyses of both SAD patterns and computer simulations of them, the crystal structure of Cr2N was confirmed to be trigonal, and the orientation relationship with γ can be expressed as [011]γ//[̄1100]Cr2N and (1̄11) γ//(0001)Cr2N.

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M3 - Article

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SN - 1598-9623

VL - 10

SP - 231

EP - 236

JO - Metals and Materials International

JF - Metals and Materials International

IS - 3

ER -

Precipitation characteristics of the second phases in high-nitrogen austenitic 18Cr-18Mn-2Mo-0.9N steel during isothermal aging

Abstract

All Science Journal Classification (ASJC) codes

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