Micromechanical behavior of TRIP-assisted multiphase steels studied with in situ high-energy X-ray diffraction

B. Fu; W. Y. Yang; Y. D. Wang; L. F. Li; Z. Q. Sun; Y. Ren

doi:10.1016/j.actamat.2014.05.029

Micromechanical behavior of TRIP-assisted multiphase steels studied with in situ high-energy X-ray diffraction

B. Fu, W. Y. Yang, Y. D. Wang, L. F. Li, Z. Q. Sun, Y. Ren

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

67 Citations (Scopus)

Abstract

The stress partitions among multiple phases for two cold-rolled transformation-induced-plasticity (TRIP)-assisted C-Mn-Al-Si steels, with different carbon content levels of 0.1% and 0.2% (mass fractions), were investigated using in situ high-energy X-ray diffraction at ambient and low temperatures (-40 °C) under uniaxial tensile loading. Based on the evolution of stresses for various phases during plastic deformation, a modified constitutive model was established for describing the micromechanical behavior of TRIP-assisted multiphase steels, based on a Gladman-type mixture law (GTML) embedded with the Mecking-Kocks work-hardening formula. The index n, an important parameter in the GTML for characterizing the accommodation of loading stresses among different phases, was determined to be severely affected by the transformation kinetics of retained austenite. The quantitative relationship between n and the transformation rate of retained austenite was also clearly revealed in the investigated alloys. The modified model thus correlates the mismatch of stresses for multiple phases with the transformation kinetics of metastable phases during plastic deformation and is suitable for all advanced steels with multi-scale microstructures. This model forms the basis for microstructure-based numerical simulations of micromechanical behavior and greatly benefits the design of a new type of high-strength and high-plasticity steel. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	342-354
Journal	Acta Materialia
Volume	76
DOIs	https://doi.org/10.1016/j.actamat.2014.05.029
Publication status	Published - 1 Sept 2014
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Constitutive model
High-energy X-ray diffraction
Micromechanical behavior
TRIP-assisted multiphase steels

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title = "Micromechanical behavior of TRIP-assisted multiphase steels studied with in situ high-energy X-ray diffraction",

abstract = "The stress partitions among multiple phases for two cold-rolled transformation-induced-plasticity (TRIP)-assisted C-Mn-Al-Si steels, with different carbon content levels of 0.1% and 0.2% (mass fractions), were investigated using in situ high-energy X-ray diffraction at ambient and low temperatures (-40 °C) under uniaxial tensile loading. Based on the evolution of stresses for various phases during plastic deformation, a modified constitutive model was established for describing the micromechanical behavior of TRIP-assisted multiphase steels, based on a Gladman-type mixture law (GTML) embedded with the Mecking-Kocks work-hardening formula. The index n, an important parameter in the GTML for characterizing the accommodation of loading stresses among different phases, was determined to be severely affected by the transformation kinetics of retained austenite. The quantitative relationship between n and the transformation rate of retained austenite was also clearly revealed in the investigated alloys. The modified model thus correlates the mismatch of stresses for multiple phases with the transformation kinetics of metastable phases during plastic deformation and is suitable for all advanced steels with multi-scale microstructures. This model forms the basis for microstructure-based numerical simulations of micromechanical behavior and greatly benefits the design of a new type of high-strength and high-plasticity steel. {\textcopyright} 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

keywords = "Constitutive model, High-energy X-ray diffraction, Micromechanical behavior, TRIP-assisted multiphase steels",

author = "B. Fu and Yang, {W. Y.} and Wang, {Y. D.} and Li, {L. F.} and Sun, {Z. Q.} and Y. Ren",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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journal = "Acta Materialia",

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TY - JOUR

T1 - Micromechanical behavior of TRIP-assisted multiphase steels studied with in situ high-energy X-ray diffraction

AU - Fu, B.

AU - Yang, W. Y.

AU - Wang, Y. D.

AU - Li, L. F.

AU - Sun, Z. Q.

AU - Ren, Y.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2014/9/1

Y1 - 2014/9/1

N2 - The stress partitions among multiple phases for two cold-rolled transformation-induced-plasticity (TRIP)-assisted C-Mn-Al-Si steels, with different carbon content levels of 0.1% and 0.2% (mass fractions), were investigated using in situ high-energy X-ray diffraction at ambient and low temperatures (-40 °C) under uniaxial tensile loading. Based on the evolution of stresses for various phases during plastic deformation, a modified constitutive model was established for describing the micromechanical behavior of TRIP-assisted multiphase steels, based on a Gladman-type mixture law (GTML) embedded with the Mecking-Kocks work-hardening formula. The index n, an important parameter in the GTML for characterizing the accommodation of loading stresses among different phases, was determined to be severely affected by the transformation kinetics of retained austenite. The quantitative relationship between n and the transformation rate of retained austenite was also clearly revealed in the investigated alloys. The modified model thus correlates the mismatch of stresses for multiple phases with the transformation kinetics of metastable phases during plastic deformation and is suitable for all advanced steels with multi-scale microstructures. This model forms the basis for microstructure-based numerical simulations of micromechanical behavior and greatly benefits the design of a new type of high-strength and high-plasticity steel. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

AB - The stress partitions among multiple phases for two cold-rolled transformation-induced-plasticity (TRIP)-assisted C-Mn-Al-Si steels, with different carbon content levels of 0.1% and 0.2% (mass fractions), were investigated using in situ high-energy X-ray diffraction at ambient and low temperatures (-40 °C) under uniaxial tensile loading. Based on the evolution of stresses for various phases during plastic deformation, a modified constitutive model was established for describing the micromechanical behavior of TRIP-assisted multiphase steels, based on a Gladman-type mixture law (GTML) embedded with the Mecking-Kocks work-hardening formula. The index n, an important parameter in the GTML for characterizing the accommodation of loading stresses among different phases, was determined to be severely affected by the transformation kinetics of retained austenite. The quantitative relationship between n and the transformation rate of retained austenite was also clearly revealed in the investigated alloys. The modified model thus correlates the mismatch of stresses for multiple phases with the transformation kinetics of metastable phases during plastic deformation and is suitable for all advanced steels with multi-scale microstructures. This model forms the basis for microstructure-based numerical simulations of micromechanical behavior and greatly benefits the design of a new type of high-strength and high-plasticity steel. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

KW - Constitutive model

KW - High-energy X-ray diffraction

KW - Micromechanical behavior

KW - TRIP-assisted multiphase steels

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U2 - 10.1016/j.actamat.2014.05.029

DO - 10.1016/j.actamat.2014.05.029

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6454

VL - 76

SP - 342

EP - 354

JO - Acta Materialia

JF - Acta Materialia

ER -

Micromechanical behavior of TRIP-assisted multiphase steels studied with in situ high-energy X-ray diffraction

Abstract

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