Micromechanical finite element analysis of strain partitioning in multiphase medium manganese TWIP+TRIP steel

Marat I. Latypov; Sunmi Shin; Bruno C. De Cooman; Hyoung Seop Kim

doi:10.1016/j.actamat.2016.02.001

Micromechanical finite element analysis of strain partitioning in multiphase medium manganese TWIP+TRIP steel

Marat I. Latypov, Sunmi Shin, Bruno C. De Cooman, Hyoung Seop Kim

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

185 Scopus citations

Abstract

In the present contribution, a phenomenological constitutive model of medium manganese steels, in which both twinning-induced (TWIP) and transformation-induced (TRIP) plasticity enhancing mechanisms are activated, is implemented in the finite element framework. The implementation is utilized for the analysis of the full-field strain partitioning in dual-phase microstructure maps obtained from electron backscattering diffraction. The results of the finite element analysis suggest that the strain localization in the studied steel has an alternating character. Specifically, in the low strain region, most of the externally imposed deformation is accommodated by the initially softer austenite. The higher strain hardening rate of austenite due to deformation twinning (TWIP effect) and the mechanically-induced transformation to martensite (TRIP effect) results in a shift of the strain localization to ferrite. This alternating strain localization is a key feature that distinguishes the medium manganese TWIP+TRIP steel. It is shown that this alternating strain localization contributes to the superior mechanical behavior of medium manganese TWIP+TRIP steel reported in the literature.

Original language	English (US)
Pages (from-to)	219-228
Number of pages	10
Journal	Acta Materialia
Volume	108
DOIs	https://doi.org/10.1016/j.actamat.2016.02.001
State	Published - Apr 15 2016
Externally published	Yes

Keywords

Finite element methods
Medium Mn steel
Strain partitioning
TWIP+TRIP

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2016.02.001

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title = "Micromechanical finite element analysis of strain partitioning in multiphase medium manganese TWIP+TRIP steel",

abstract = "In the present contribution, a phenomenological constitutive model of medium manganese steels, in which both twinning-induced (TWIP) and transformation-induced (TRIP) plasticity enhancing mechanisms are activated, is implemented in the finite element framework. The implementation is utilized for the analysis of the full-field strain partitioning in dual-phase microstructure maps obtained from electron backscattering diffraction. The results of the finite element analysis suggest that the strain localization in the studied steel has an alternating character. Specifically, in the low strain region, most of the externally imposed deformation is accommodated by the initially softer austenite. The higher strain hardening rate of austenite due to deformation twinning (TWIP effect) and the mechanically-induced transformation to martensite (TRIP effect) results in a shift of the strain localization to ferrite. This alternating strain localization is a key feature that distinguishes the medium manganese TWIP+TRIP steel. It is shown that this alternating strain localization contributes to the superior mechanical behavior of medium manganese TWIP+TRIP steel reported in the literature.",

keywords = "Finite element methods, Medium Mn steel, Strain partitioning, TWIP+TRIP",

author = "Latypov, {Marat I.} and Sunmi Shin and {De Cooman}, {Bruno C.} and Kim, {Hyoung Seop}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIP ) (No. 2014R1A2A1A10051322 ). The authors also gratefully acknowledge the support of the POSCO Technical Research Laboratories. Publisher Copyright: {\textcopyright} 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

year = "2016",

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doi = "10.1016/j.actamat.2016.02.001",

language = "English (US)",

volume = "108",

pages = "219--228",

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T1 - Micromechanical finite element analysis of strain partitioning in multiphase medium manganese TWIP+TRIP steel

AU - Latypov, Marat I.

AU - Shin, Sunmi

AU - De Cooman, Bruno C.

AU - Kim, Hyoung Seop

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIP ) (No. 2014R1A2A1A10051322 ). The authors also gratefully acknowledge the support of the POSCO Technical Research Laboratories. Publisher Copyright: © 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

PY - 2016/4/15

Y1 - 2016/4/15

N2 - In the present contribution, a phenomenological constitutive model of medium manganese steels, in which both twinning-induced (TWIP) and transformation-induced (TRIP) plasticity enhancing mechanisms are activated, is implemented in the finite element framework. The implementation is utilized for the analysis of the full-field strain partitioning in dual-phase microstructure maps obtained from electron backscattering diffraction. The results of the finite element analysis suggest that the strain localization in the studied steel has an alternating character. Specifically, in the low strain region, most of the externally imposed deformation is accommodated by the initially softer austenite. The higher strain hardening rate of austenite due to deformation twinning (TWIP effect) and the mechanically-induced transformation to martensite (TRIP effect) results in a shift of the strain localization to ferrite. This alternating strain localization is a key feature that distinguishes the medium manganese TWIP+TRIP steel. It is shown that this alternating strain localization contributes to the superior mechanical behavior of medium manganese TWIP+TRIP steel reported in the literature.

AB - In the present contribution, a phenomenological constitutive model of medium manganese steels, in which both twinning-induced (TWIP) and transformation-induced (TRIP) plasticity enhancing mechanisms are activated, is implemented in the finite element framework. The implementation is utilized for the analysis of the full-field strain partitioning in dual-phase microstructure maps obtained from electron backscattering diffraction. The results of the finite element analysis suggest that the strain localization in the studied steel has an alternating character. Specifically, in the low strain region, most of the externally imposed deformation is accommodated by the initially softer austenite. The higher strain hardening rate of austenite due to deformation twinning (TWIP effect) and the mechanically-induced transformation to martensite (TRIP effect) results in a shift of the strain localization to ferrite. This alternating strain localization is a key feature that distinguishes the medium manganese TWIP+TRIP steel. It is shown that this alternating strain localization contributes to the superior mechanical behavior of medium manganese TWIP+TRIP steel reported in the literature.

KW - Finite element methods

KW - Medium Mn steel

KW - Strain partitioning

KW - TWIP+TRIP

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JO - Acta Materialia

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Micromechanical finite element analysis of strain partitioning in multiphase medium manganese TWIP+TRIP steel

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Keywords

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