Influence of Cobalt Content on Austenite Stability and Strain-Induced Martensite Transformation of Nanocrystalline Fe-7Mn Alloy Fabricated by Spark Plasma Sintering

Sungjin Kim; Seung Bae Son; Seok Jae Lee

doi:10.2320/matertrans.MT-MB2024010

Influence of Cobalt Content on Austenite Stability and Strain-Induced Martensite Transformation of Nanocrystalline Fe-7Mn Alloy Fabricated by Spark Plasma Sintering

Sungjin Kim
, Seung Bae Son
, Seok Jae Lee^*

^*Corresponding author for this work

Metallurgical System Engineering

Jeonbuk National University

Research output: Contribution to journal › Journal article › peer-review

Abstract

Recently, there has been a lot of research on the third generation of advanced high-strength steels as a solution to reduce CO₂ emissions. The effect of Co addition on the austenitic stability of nanocrystalline Fe-7%Mn alloy was investigated by X-ray diffraction (XRD) analysis and microscopic observation. Fe-7%Mn-Co alloy samples with nano-sized crystal size were successfully prepared by spark plasma sintering. The austenite fraction in the sintered alloys was determined by the Averbach-Cohen model. The austenite fraction decreased with Co addition. The Burke-Matsumura-Tsuchida (BMT) model was also used to evaluate the austenite stability of the alloy as a function of Co addition. The austenitic stability decreased with increasing Co addition. This is because Co reduces the stacking fault energy (SFE), which reduces the austenite stabilizing effect and promotes martensitic transformation.

Original language	English
Pages (from-to)	811-815
Number of pages	5
Journal	Materials Transactions
Volume	66
Issue number	7
DOIs	https://doi.org/10.2320/matertrans.MT-MB2024010
State	Published - 2025.07

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

austenite stability
cobalt effect
nanocrystalline Fe-Mn alloy
strain-induced martensite transformation

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Engineering - Mechanical
Physics & Astronomy

Access to Document

10.2320/matertrans.MT-MB2024010

Cite this

@article{1d0015c169a24119a677e810f8874caa,

title = "Influence of Cobalt Content on Austenite Stability and Strain-Induced Martensite Transformation of Nanocrystalline Fe-7Mn Alloy Fabricated by Spark Plasma Sintering",

abstract = "Recently, there has been a lot of research on the third generation of advanced high-strength steels as a solution to reduce CO2 emissions. The effect of Co addition on the austenitic stability of nanocrystalline Fe-7\%Mn alloy was investigated by X-ray diffraction (XRD) analysis and microscopic observation. Fe-7\%Mn-Co alloy samples with nano-sized crystal size were successfully prepared by spark plasma sintering. The austenite fraction in the sintered alloys was determined by the Averbach-Cohen model. The austenite fraction decreased with Co addition. The Burke-Matsumura-Tsuchida (BMT) model was also used to evaluate the austenite stability of the alloy as a function of Co addition. The austenitic stability decreased with increasing Co addition. This is because Co reduces the stacking fault energy (SFE), which reduces the austenite stabilizing effect and promotes martensitic transformation.",

keywords = "austenite stability, cobalt effect, nanocrystalline Fe-Mn alloy, strain-induced martensite transformation",

author = "Sungjin Kim and Son, \{Seung Bae\} and Lee, \{Seok Jae\}",

note = "Publisher Copyright: {\textcopyright}2025 The Japan Institute of Metals and Materials.",

year = "2025",

month = jul,

doi = "10.2320/matertrans.MT-MB2024010",

language = "English",

volume = "66",

pages = "811--815",

journal = "Materials Transactions",

issn = "1345-9678",

number = "7",

}

TY - JOUR

T1 - Influence of Cobalt Content on Austenite Stability and Strain-Induced Martensite Transformation of Nanocrystalline Fe-7Mn Alloy Fabricated by Spark Plasma Sintering

AU - Kim, Sungjin

AU - Son, Seung Bae

AU - Lee, Seok Jae

PY - 2025/7

Y1 - 2025/7

N2 - Recently, there has been a lot of research on the third generation of advanced high-strength steels as a solution to reduce CO2 emissions. The effect of Co addition on the austenitic stability of nanocrystalline Fe-7%Mn alloy was investigated by X-ray diffraction (XRD) analysis and microscopic observation. Fe-7%Mn-Co alloy samples with nano-sized crystal size were successfully prepared by spark plasma sintering. The austenite fraction in the sintered alloys was determined by the Averbach-Cohen model. The austenite fraction decreased with Co addition. The Burke-Matsumura-Tsuchida (BMT) model was also used to evaluate the austenite stability of the alloy as a function of Co addition. The austenitic stability decreased with increasing Co addition. This is because Co reduces the stacking fault energy (SFE), which reduces the austenite stabilizing effect and promotes martensitic transformation.

AB - Recently, there has been a lot of research on the third generation of advanced high-strength steels as a solution to reduce CO2 emissions. The effect of Co addition on the austenitic stability of nanocrystalline Fe-7%Mn alloy was investigated by X-ray diffraction (XRD) analysis and microscopic observation. Fe-7%Mn-Co alloy samples with nano-sized crystal size were successfully prepared by spark plasma sintering. The austenite fraction in the sintered alloys was determined by the Averbach-Cohen model. The austenite fraction decreased with Co addition. The Burke-Matsumura-Tsuchida (BMT) model was also used to evaluate the austenite stability of the alloy as a function of Co addition. The austenitic stability decreased with increasing Co addition. This is because Co reduces the stacking fault energy (SFE), which reduces the austenite stabilizing effect and promotes martensitic transformation.

KW - austenite stability

KW - cobalt effect

KW - nanocrystalline Fe-Mn alloy

KW - strain-induced martensite transformation

UR - https://www.scopus.com/pages/publications/105009270285

U2 - 10.2320/matertrans.MT-MB2024010

DO - 10.2320/matertrans.MT-MB2024010

M3 - Journal article

AN - SCOPUS:105009270285

SN - 1345-9678

VL - 66

SP - 811

EP - 815

JO - Materials Transactions

JF - Materials Transactions

IS - 7

ER -

Influence of Cobalt Content on Austenite Stability and Strain-Induced Martensite Transformation of Nanocrystalline Fe-7Mn Alloy Fabricated by Spark Plasma Sintering

Abstract

UN SDGs

Keywords

Quacquarelli Symonds(QS) Subject Topics

Access to Document

Other files and links

Fingerprint

Study Results from Jeonbuk National University Update Understanding of Nanocrystals (Influence of Cobalt Content On Austenite Stability and Strain-induced Martensite Transformation of Nanocrystalline Fe-7mn Alloy Fabricated By Spark Plasma ...)

Cite this

Influence of Cobalt Content on Austenite Stability and Strain-Induced Martensite Transformation of Nanocrystalline Fe-7Mn Alloy Fabricated by Spark Plasma Sintering

Abstract

UN SDGs

Keywords

Quacquarelli Symonds(QS) Subject Topics

Access to Document

Other files and links

Fingerprint

Press/Media

Study Results from Jeonbuk National University Update Understanding of Nanocrystals (Influence of Cobalt Content On Austenite Stability and Strain-induced Martensite Transformation of Nanocrystalline Fe-7mn Alloy Fabricated By Spark Plasma ...)

Cite this