Influence of precooling and deformation temperature on microstructure and mechanical properties in a high-manganese austenitic steel

P. Behjati; A. Kermanpur; A. Najafizadeh; H. Samaei Baghbadorani; J. G. Jung; Y. K. Lee

doi:10.1016/j.msea.2014.07.034

Influence of precooling and deformation temperature on microstructure and mechanical properties in a high-manganese austenitic steel

P. Behjati^*
, A. Kermanpur
, A. Najafizadeh
, H. Samaei Baghbadorani
, J. G. Jung
, Y. K. Lee

^*Corresponding author for this work

Metallurgical System Engineering

Isfahan University of Technology
Yonsei University
Korea Institute of Materials Science

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

2 Scopus citations

Abstract

In this work, the influence of precooling on deformation-induced α'-martensitic transformation and mechanical properties of Fe-16Mn-4Cr-0.1C (wt%) austenitic steel is investigated. It is shown that precooling in liquid nitrogen enhances the volume fraction of ε-martensite. During tensile testing, ε-martensite acts as a nucleation site for α'-martensite and promotes the strength and ductility of the steel. The precooled steel exhibits an excellent combination of mechanical properties (tensile strength of 1240. MPa, uniform elongation of 35% and total elongation of 42%). Further, it is shown that tensile strength and elongation of the steel strongly depend on the deformation temperature. This is explained by the influence of temperature on stacking fault energy (SFE) and accordingly governing deformation mechanisms of the steel.

Original language	English
Pages (from-to)	232-237
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	614
DOIs	https://doi.org/10.1016/j.msea.2014.07.034
State	Published - 2014.09.22

Keywords

Deformation
High-manganese
Martensite
Mechanical properties
Twin

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10.1016/j.msea.2014.07.034

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title = "Influence of precooling and deformation temperature on microstructure and mechanical properties in a high-manganese austenitic steel",

abstract = "In this work, the influence of precooling on deformation-induced α'-martensitic transformation and mechanical properties of Fe-16Mn-4Cr-0.1C (wt\%) austenitic steel is investigated. It is shown that precooling in liquid nitrogen enhances the volume fraction of ε-martensite. During tensile testing, ε-martensite acts as a nucleation site for α'-martensite and promotes the strength and ductility of the steel. The precooled steel exhibits an excellent combination of mechanical properties (tensile strength of 1240. MPa, uniform elongation of 35\% and total elongation of 42\%). Further, it is shown that tensile strength and elongation of the steel strongly depend on the deformation temperature. This is explained by the influence of temperature on stacking fault energy (SFE) and accordingly governing deformation mechanisms of the steel.",

keywords = "Deformation, High-manganese, Martensite, Mechanical properties, Twin",

author = "P. Behjati and A. Kermanpur and A. Najafizadeh and Baghbadorani, \{H. Samaei\} and Jung, \{J. G.\} and Lee, \{Y. K.\}",

year = "2014",

month = sep,

day = "22",

doi = "10.1016/j.msea.2014.07.034",

language = "English",

volume = "614",

pages = "232--237",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

}

TY - JOUR

T1 - Influence of precooling and deformation temperature on microstructure and mechanical properties in a high-manganese austenitic steel

AU - Behjati, P.

AU - Kermanpur, A.

AU - Najafizadeh, A.

AU - Baghbadorani, H. Samaei

AU - Jung, J. G.

AU - Lee, Y. K.

PY - 2014/9/22

Y1 - 2014/9/22

N2 - In this work, the influence of precooling on deformation-induced α'-martensitic transformation and mechanical properties of Fe-16Mn-4Cr-0.1C (wt%) austenitic steel is investigated. It is shown that precooling in liquid nitrogen enhances the volume fraction of ε-martensite. During tensile testing, ε-martensite acts as a nucleation site for α'-martensite and promotes the strength and ductility of the steel. The precooled steel exhibits an excellent combination of mechanical properties (tensile strength of 1240. MPa, uniform elongation of 35% and total elongation of 42%). Further, it is shown that tensile strength and elongation of the steel strongly depend on the deformation temperature. This is explained by the influence of temperature on stacking fault energy (SFE) and accordingly governing deformation mechanisms of the steel.

AB - In this work, the influence of precooling on deformation-induced α'-martensitic transformation and mechanical properties of Fe-16Mn-4Cr-0.1C (wt%) austenitic steel is investigated. It is shown that precooling in liquid nitrogen enhances the volume fraction of ε-martensite. During tensile testing, ε-martensite acts as a nucleation site for α'-martensite and promotes the strength and ductility of the steel. The precooled steel exhibits an excellent combination of mechanical properties (tensile strength of 1240. MPa, uniform elongation of 35% and total elongation of 42%). Further, it is shown that tensile strength and elongation of the steel strongly depend on the deformation temperature. This is explained by the influence of temperature on stacking fault energy (SFE) and accordingly governing deformation mechanisms of the steel.

KW - Deformation

KW - High-manganese

KW - Martensite

KW - Mechanical properties

KW - Twin

UR - https://www.scopus.com/pages/publications/84905215827

U2 - 10.1016/j.msea.2014.07.034

DO - 10.1016/j.msea.2014.07.034

M3 - Journal article

AN - SCOPUS:84905215827

SN - 0921-5093

VL - 614

SP - 232

EP - 237

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Influence of precooling and deformation temperature on microstructure and mechanical properties in a high-manganese austenitic steel

Abstract

Keywords

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