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On the first direct observation of de-twinning in a twinning-induced plasticity steel

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On the first direct observation of de-twinning in a twinning-induced plasticity steel. / McCormack, S.J.; Wen, W.; Pereloma, E.V. et al.
In: Acta Materialia, Vol. 156, 01.09.2018, p. 172-182.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

McCormack, SJ, Wen, W, Pereloma, EV, Tomé, CN, Gazder, AA & Saleh, AA 2018, 'On the first direct observation of de-twinning in a twinning-induced plasticity steel', Acta Materialia, vol. 156, pp. 172-182. https://doi.org/10.1016/j.actamat.2018.06.029

APA

McCormack, S. J., Wen, W., Pereloma, E. V., Tomé, C. N., Gazder, A. A., & Saleh, A. A. (2018). On the first direct observation of de-twinning in a twinning-induced plasticity steel. Acta Materialia, 156, 172-182. https://doi.org/10.1016/j.actamat.2018.06.029

Vancouver

McCormack SJ, Wen W, Pereloma EV, Tomé CN, Gazder AA, Saleh AA. On the first direct observation of de-twinning in a twinning-induced plasticity steel. Acta Materialia. 2018 Sept 1;156:172-182. Epub 2018 Jun 20. doi: 10.1016/j.actamat.2018.06.029

Author

McCormack, S.J. ; Wen, W. ; Pereloma, E.V. et al. / On the first direct observation of de-twinning in a twinning-induced plasticity steel. In: Acta Materialia. 2018 ; Vol. 156. pp. 172-182.

Bibtex

@article{ab883b9f379146c18dbb8284845d503e,
title = "On the first direct observation of de-twinning in a twinning-induced plasticity steel",
abstract = "Electron back-scattering diffraction was used to track the microstructure evolution of a fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel during interrupted reverse (tension-compression) loading. Direct observation of the same selected area revealed that all deformation twins formed during forward tension loading (0.128 true strain) were removed upon subsequent reverse compression loading (0.031 true strain). Consequently, the present study provides the first unambiguous experimental evidence of de-twinning during the reverse loading of a polycrystalline TWIP steel. The reverse loading behaviour was simulated by a dislocation-based hardening model embedded in the Visco-Plastic Self-Consistent (VPSC) polycrystal framework taking into account the accumulation and annihilation of dislocations and back-stress effects. The model has been extended to account for the processes of twinning and de-twinning, as well as the twin barrier effect under load reversal. A new formulation based on the changes in the dislocation mean free path is proposed to track twin lamellae generation/annihilation throughout deformation along with its associated effect on hardening.",
keywords = "TWIP steel, De-twinning, Reverse loading, Electron back-scattering diffraction (EBSD), VPSC",
author = "S.J. McCormack and W. Wen and E.V. Pereloma and C.N. Tom{\'e} and A.A. Gazder and A.A. Saleh",
year = "2018",
month = sep,
day = "1",
doi = "10.1016/j.actamat.2018.06.029",
language = "English",
volume = "156",
pages = "172--182",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

}

RIS

TY - JOUR

T1 - On the first direct observation of de-twinning in a twinning-induced plasticity steel

AU - McCormack, S.J.

AU - Wen, W.

AU - Pereloma, E.V.

AU - Tomé, C.N.

AU - Gazder, A.A.

AU - Saleh, A.A.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Electron back-scattering diffraction was used to track the microstructure evolution of a fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel during interrupted reverse (tension-compression) loading. Direct observation of the same selected area revealed that all deformation twins formed during forward tension loading (0.128 true strain) were removed upon subsequent reverse compression loading (0.031 true strain). Consequently, the present study provides the first unambiguous experimental evidence of de-twinning during the reverse loading of a polycrystalline TWIP steel. The reverse loading behaviour was simulated by a dislocation-based hardening model embedded in the Visco-Plastic Self-Consistent (VPSC) polycrystal framework taking into account the accumulation and annihilation of dislocations and back-stress effects. The model has been extended to account for the processes of twinning and de-twinning, as well as the twin barrier effect under load reversal. A new formulation based on the changes in the dislocation mean free path is proposed to track twin lamellae generation/annihilation throughout deformation along with its associated effect on hardening.

AB - Electron back-scattering diffraction was used to track the microstructure evolution of a fully annealed Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel during interrupted reverse (tension-compression) loading. Direct observation of the same selected area revealed that all deformation twins formed during forward tension loading (0.128 true strain) were removed upon subsequent reverse compression loading (0.031 true strain). Consequently, the present study provides the first unambiguous experimental evidence of de-twinning during the reverse loading of a polycrystalline TWIP steel. The reverse loading behaviour was simulated by a dislocation-based hardening model embedded in the Visco-Plastic Self-Consistent (VPSC) polycrystal framework taking into account the accumulation and annihilation of dislocations and back-stress effects. The model has been extended to account for the processes of twinning and de-twinning, as well as the twin barrier effect under load reversal. A new formulation based on the changes in the dislocation mean free path is proposed to track twin lamellae generation/annihilation throughout deformation along with its associated effect on hardening.

KW - TWIP steel

KW - De-twinning

KW - Reverse loading

KW - Electron back-scattering diffraction (EBSD)

KW - VPSC

U2 - 10.1016/j.actamat.2018.06.029

DO - 10.1016/j.actamat.2018.06.029

M3 - Journal article

VL - 156

SP - 172

EP - 182

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

ER -