Grain interaction mechanisms leading to intragranular orientation spread in tensile deformed bulk grains of interstitial-free steel

Grethe Winther, Jonathan P. Wright, Søren Schmidt, Jette Oddershede

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Abstract

The spatially resolved intragranular orientation spread in two representative bulk grains of interstitial-free steel deformed to 9% tension has been investigated. A three-dimensional X-ray diffraction microscopy experiment revealed that the two similarly oriented grains are both embedded in local environments representing the bulk texture, yet their deformation-induced rotations are very different. The ALAMEL model is employed to analyse the grain interaction mechanisms. Predictions of this model qualitatively agree with the directionality and magnitude of the experimental orientation spread. However, quantitative agreement requires fine-tuning of the boundary conditions. The majority of the modelled slip is accounted for by four slip systems also predicted to be active by the classical Taylor model in uniaxial tension, and most of the orientation spread along the grain boundaries is caused by relative variations in the activities of these. Although limited to two grains, the findings prove that shear at the grain boundaries as accounted for by the ALAMEL model is a dominant grain interaction mechanism.
Original languageEnglish
JournalInternational Journal of Plasticity
Volume88
Pages (from-to)108-125
ISSN0749-6419
DOIs
Publication statusPublished - 2017

Keywords

  • Grain boundaries
  • Polycrystalline material
  • Crystal plasticity
  • Non-destructive evaluation
  • ALAMEL model

Cite this

@article{d88fc120e3ac43789163016bc507d786,
title = "Grain interaction mechanisms leading to intragranular orientation spread in tensile deformed bulk grains of interstitial-free steel",
abstract = "The spatially resolved intragranular orientation spread in two representative bulk grains of interstitial-free steel deformed to 9{\%} tension has been investigated. A three-dimensional X-ray diffraction microscopy experiment revealed that the two similarly oriented grains are both embedded in local environments representing the bulk texture, yet their deformation-induced rotations are very different. The ALAMEL model is employed to analyse the grain interaction mechanisms. Predictions of this model qualitatively agree with the directionality and magnitude of the experimental orientation spread. However, quantitative agreement requires fine-tuning of the boundary conditions. The majority of the modelled slip is accounted for by four slip systems also predicted to be active by the classical Taylor model in uniaxial tension, and most of the orientation spread along the grain boundaries is caused by relative variations in the activities of these. Although limited to two grains, the findings prove that shear at the grain boundaries as accounted for by the ALAMEL model is a dominant grain interaction mechanism.",
keywords = "Grain boundaries, Polycrystalline material, Crystal plasticity, Non-destructive evaluation, ALAMEL model",
author = "Grethe Winther and Wright, {Jonathan P.} and S{\o}ren Schmidt and Jette Oddershede",
year = "2017",
doi = "10.1016/j.ijplas.2016.10.004",
language = "English",
volume = "88",
pages = "108--125",
journal = "International Journal of Plasticity",
issn = "0749-6419",
publisher = "Pergamon Press",

}

Grain interaction mechanisms leading to intragranular orientation spread in tensile deformed bulk grains of interstitial-free steel. / Winther, Grethe; Wright, Jonathan P.; Schmidt, Søren; Oddershede, Jette.

In: International Journal of Plasticity, Vol. 88, 2017, p. 108-125.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Grain interaction mechanisms leading to intragranular orientation spread in tensile deformed bulk grains of interstitial-free steel

AU - Winther, Grethe

AU - Wright, Jonathan P.

AU - Schmidt, Søren

AU - Oddershede, Jette

PY - 2017

Y1 - 2017

N2 - The spatially resolved intragranular orientation spread in two representative bulk grains of interstitial-free steel deformed to 9% tension has been investigated. A three-dimensional X-ray diffraction microscopy experiment revealed that the two similarly oriented grains are both embedded in local environments representing the bulk texture, yet their deformation-induced rotations are very different. The ALAMEL model is employed to analyse the grain interaction mechanisms. Predictions of this model qualitatively agree with the directionality and magnitude of the experimental orientation spread. However, quantitative agreement requires fine-tuning of the boundary conditions. The majority of the modelled slip is accounted for by four slip systems also predicted to be active by the classical Taylor model in uniaxial tension, and most of the orientation spread along the grain boundaries is caused by relative variations in the activities of these. Although limited to two grains, the findings prove that shear at the grain boundaries as accounted for by the ALAMEL model is a dominant grain interaction mechanism.

AB - The spatially resolved intragranular orientation spread in two representative bulk grains of interstitial-free steel deformed to 9% tension has been investigated. A three-dimensional X-ray diffraction microscopy experiment revealed that the two similarly oriented grains are both embedded in local environments representing the bulk texture, yet their deformation-induced rotations are very different. The ALAMEL model is employed to analyse the grain interaction mechanisms. Predictions of this model qualitatively agree with the directionality and magnitude of the experimental orientation spread. However, quantitative agreement requires fine-tuning of the boundary conditions. The majority of the modelled slip is accounted for by four slip systems also predicted to be active by the classical Taylor model in uniaxial tension, and most of the orientation spread along the grain boundaries is caused by relative variations in the activities of these. Although limited to two grains, the findings prove that shear at the grain boundaries as accounted for by the ALAMEL model is a dominant grain interaction mechanism.

KW - Grain boundaries

KW - Polycrystalline material

KW - Crystal plasticity

KW - Non-destructive evaluation

KW - ALAMEL model

U2 - 10.1016/j.ijplas.2016.10.004

DO - 10.1016/j.ijplas.2016.10.004

M3 - Journal article

VL - 88

SP - 108

EP - 125

JO - International Journal of Plasticity

JF - International Journal of Plasticity

SN - 0749-6419

ER -