On the effect of deformation twinning and microstructure to strain hardening of high manganese austenitic steel 3D microstructure aggregates at large strains

Matti Lindroos, Anssi Laukkanen, Georges Cailletaud, Veli Kuokkala

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The hardening and deformation characteristics of Hadfield microstructure are studied to investigate the effect of microstucture to the material behavior. A crystal plasticity model including dislocation slip and deformation twinning is employed. The role of deformation twinning to the overall strain hardening of the material is evaluated for two different grain structures. Large compressive strains are applied on 3D microstructural aggregates representing the uniform and non-uniform grain structures of Hadfield steels. The grain structure has an effect on the strain hardening rate as well as on the overall hardening capability of the microstructure. A major reason causing the difference in strain hardening arises from the different twin volume fraction evolution influenced by intra-grain and inter-grain interactions. A mixture of large and small grains was found to be more favorable for twinning and thus resulting in a greater hardening capability than uniform grain size.
Original languageEnglish
Pages (from-to)68-76
Number of pages9
JournalInternational Journal of Solids and Structures
Volume125
DOIs
Publication statusPublished - 15 Oct 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

Twinning
Manganese
Strain Hardening
Large Strain
Austenitic steel
strain hardening
Crystal microstructure
twinning
Strain hardening
Hardening
manganese
Microstructure
Steel
steels
microstructure
hardening
Dislocations (crystals)
Plasticity
Volume fraction
Crystal Plasticity

Keywords

  • austenitic manganese steel
  • crystal plasticity
  • deformation twinning
  • microstructure based modeling

Cite this

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title = "On the effect of deformation twinning and microstructure to strain hardening of high manganese austenitic steel 3D microstructure aggregates at large strains",
abstract = "The hardening and deformation characteristics of Hadfield microstructure are studied to investigate the effect of microstucture to the material behavior. A crystal plasticity model including dislocation slip and deformation twinning is employed. The role of deformation twinning to the overall strain hardening of the material is evaluated for two different grain structures. Large compressive strains are applied on 3D microstructural aggregates representing the uniform and non-uniform grain structures of Hadfield steels. The grain structure has an effect on the strain hardening rate as well as on the overall hardening capability of the microstructure. A major reason causing the difference in strain hardening arises from the different twin volume fraction evolution influenced by intra-grain and inter-grain interactions. A mixture of large and small grains was found to be more favorable for twinning and thus resulting in a greater hardening capability than uniform grain size.",
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On the effect of deformation twinning and microstructure to strain hardening of high manganese austenitic steel 3D microstructure aggregates at large strains. / Lindroos, Matti; Laukkanen, Anssi; Cailletaud, Georges; Kuokkala, Veli.

In: International Journal of Solids and Structures, Vol. 125, 15.10.2017, p. 68-76.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - On the effect of deformation twinning and microstructure to strain hardening of high manganese austenitic steel 3D microstructure aggregates at large strains

AU - Lindroos, Matti

AU - Laukkanen, Anssi

AU - Cailletaud, Georges

AU - Kuokkala, Veli

PY - 2017/10/15

Y1 - 2017/10/15

N2 - The hardening and deformation characteristics of Hadfield microstructure are studied to investigate the effect of microstucture to the material behavior. A crystal plasticity model including dislocation slip and deformation twinning is employed. The role of deformation twinning to the overall strain hardening of the material is evaluated for two different grain structures. Large compressive strains are applied on 3D microstructural aggregates representing the uniform and non-uniform grain structures of Hadfield steels. The grain structure has an effect on the strain hardening rate as well as on the overall hardening capability of the microstructure. A major reason causing the difference in strain hardening arises from the different twin volume fraction evolution influenced by intra-grain and inter-grain interactions. A mixture of large and small grains was found to be more favorable for twinning and thus resulting in a greater hardening capability than uniform grain size.

AB - The hardening and deformation characteristics of Hadfield microstructure are studied to investigate the effect of microstucture to the material behavior. A crystal plasticity model including dislocation slip and deformation twinning is employed. The role of deformation twinning to the overall strain hardening of the material is evaluated for two different grain structures. Large compressive strains are applied on 3D microstructural aggregates representing the uniform and non-uniform grain structures of Hadfield steels. The grain structure has an effect on the strain hardening rate as well as on the overall hardening capability of the microstructure. A major reason causing the difference in strain hardening arises from the different twin volume fraction evolution influenced by intra-grain and inter-grain interactions. A mixture of large and small grains was found to be more favorable for twinning and thus resulting in a greater hardening capability than uniform grain size.

KW - austenitic manganese steel

KW - crystal plasticity

KW - deformation twinning

KW - microstructure based modeling

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