Isothermal precipitation behavior of j-carbide in the Fe-9Mn-6Al-0.15C lightweight steel with a multiphase microstructure

Junyeong Jeong, Chan Young Lee, Il Jeong Park, Young-Kook Lee

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The precipitation behavior of j-carbide during isothermal aging was investigated in the Fe-9Mn-6Al- 0.15C (wt.%) lightweight steel through thermodynamic calculations and microstructural analyses using various microscopes and an X-ray diffractometer. No precipitates of j-carbide were observed in both hot-rolled and annealed specimens. The j-carbide started to precipitate at the grain boundaries of d-ferrite and at interphase boundaries between δ-ferrite and γ-austenite and between α-ferrite and a0-martensite after isothermal aging at 550 °C for 1 h. While the precipitation and growth of κ-carbide at the boundaries continued, new κ-carbide precipitated alongside α-ferrite by the eutectoid reaction to form a lamellar structure in austenite during 6-h aging. This result confirmed that the precipitation of κ-carbide at the boundaries preceded the precipitation of the lamellar κ-carbide due to the pre-segregation of solute atoms to the boundaries. The α'-martensite was not transformed to γ-austenite and just tempered during isothermal aging at 550 °C.

Original languageEnglish
Pages (from-to)299-304
Number of pages6
JournalJournal of Alloys and Compounds
Volume574
DOIs
Publication statusPublished - 2013 Jan 1

Fingerprint

Steel
Carbides
Microstructure
Ferrite
Aging of materials
Austenite
Martensite
Precipitates
Lamellar structures
Diffractometers
Grain boundaries
Microscopes
Thermodynamics
X rays
Atoms

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

@article{f7471a914cfa470fbc724c21930819ea,
title = "Isothermal precipitation behavior of j-carbide in the Fe-9Mn-6Al-0.15C lightweight steel with a multiphase microstructure",
abstract = "The precipitation behavior of j-carbide during isothermal aging was investigated in the Fe-9Mn-6Al- 0.15C (wt.{\%}) lightweight steel through thermodynamic calculations and microstructural analyses using various microscopes and an X-ray diffractometer. No precipitates of j-carbide were observed in both hot-rolled and annealed specimens. The j-carbide started to precipitate at the grain boundaries of d-ferrite and at interphase boundaries between δ-ferrite and γ-austenite and between α-ferrite and a0-martensite after isothermal aging at 550 °C for 1 h. While the precipitation and growth of κ-carbide at the boundaries continued, new κ-carbide precipitated alongside α-ferrite by the eutectoid reaction to form a lamellar structure in austenite during 6-h aging. This result confirmed that the precipitation of κ-carbide at the boundaries preceded the precipitation of the lamellar κ-carbide due to the pre-segregation of solute atoms to the boundaries. The α'-martensite was not transformed to γ-austenite and just tempered during isothermal aging at 550 °C.",
author = "Junyeong Jeong and Lee, {Chan Young} and Park, {Il Jeong} and Young-Kook Lee",
year = "2013",
month = "1",
day = "1",
doi = "10.1016/j.jallcom.2013.05.138",
language = "English",
volume = "574",
pages = "299--304",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",

}

Isothermal precipitation behavior of j-carbide in the Fe-9Mn-6Al-0.15C lightweight steel with a multiphase microstructure. / Jeong, Junyeong; Lee, Chan Young; Park, Il Jeong; Lee, Young-Kook.

In: Journal of Alloys and Compounds, Vol. 574, 01.01.2013, p. 299-304.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Isothermal precipitation behavior of j-carbide in the Fe-9Mn-6Al-0.15C lightweight steel with a multiphase microstructure

AU - Jeong, Junyeong

AU - Lee, Chan Young

AU - Park, Il Jeong

AU - Lee, Young-Kook

PY - 2013/1/1

Y1 - 2013/1/1

N2 - The precipitation behavior of j-carbide during isothermal aging was investigated in the Fe-9Mn-6Al- 0.15C (wt.%) lightweight steel through thermodynamic calculations and microstructural analyses using various microscopes and an X-ray diffractometer. No precipitates of j-carbide were observed in both hot-rolled and annealed specimens. The j-carbide started to precipitate at the grain boundaries of d-ferrite and at interphase boundaries between δ-ferrite and γ-austenite and between α-ferrite and a0-martensite after isothermal aging at 550 °C for 1 h. While the precipitation and growth of κ-carbide at the boundaries continued, new κ-carbide precipitated alongside α-ferrite by the eutectoid reaction to form a lamellar structure in austenite during 6-h aging. This result confirmed that the precipitation of κ-carbide at the boundaries preceded the precipitation of the lamellar κ-carbide due to the pre-segregation of solute atoms to the boundaries. The α'-martensite was not transformed to γ-austenite and just tempered during isothermal aging at 550 °C.

AB - The precipitation behavior of j-carbide during isothermal aging was investigated in the Fe-9Mn-6Al- 0.15C (wt.%) lightweight steel through thermodynamic calculations and microstructural analyses using various microscopes and an X-ray diffractometer. No precipitates of j-carbide were observed in both hot-rolled and annealed specimens. The j-carbide started to precipitate at the grain boundaries of d-ferrite and at interphase boundaries between δ-ferrite and γ-austenite and between α-ferrite and a0-martensite after isothermal aging at 550 °C for 1 h. While the precipitation and growth of κ-carbide at the boundaries continued, new κ-carbide precipitated alongside α-ferrite by the eutectoid reaction to form a lamellar structure in austenite during 6-h aging. This result confirmed that the precipitation of κ-carbide at the boundaries preceded the precipitation of the lamellar κ-carbide due to the pre-segregation of solute atoms to the boundaries. The α'-martensite was not transformed to γ-austenite and just tempered during isothermal aging at 550 °C.

UR - http://www.scopus.com/inward/record.url?scp=84879058112&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879058112&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2013.05.138

DO - 10.1016/j.jallcom.2013.05.138

M3 - Article

VL - 574

SP - 299

EP - 304

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -