Strain hardening and heterogeneous deformation during twinning in Hadfield steel

Efstathiou, C.; Şehitoğlu, Hüseyin

doi:10.1016/j.actamat.2009.10.054

Cited by 128 publications

(58 citation statements)

References 28 publications

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“…Here the Schmid factor for twinning is taken as the Schmid factor value of the leading partial dislocation. Since this value is different under tension and compression [16], twinning in fcc materials occurs by shear in one direction but not in the opposite direction. Interestingly, Kibey et al [17] provided a physical mechanistic basis for the twinning directionality following their ab initio density functional theory calculations.…”

Section: Resultsmentioning

confidence: 99%

On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

et al. 2016

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A recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the cyclic (tensioncompression) loading behaviour of an Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel between strain limits of ±1%. Lattice strain measurements acquired via in-situ neutron diffraction were used to further validate the modelling results. An improved prediction of the pronounced Bauschinger effect during unloading is achieved when the reversibility of partial slip in the 〈112〉 direction is accounted for. This result indicates a potential contribution of the stress-induced separation of partial dislocations to the observed early yielding at the low strain levels employed in this study. It also raises the possibility that detwinning events could be operative during load reversal.  direction is accounted for. This result indicates a potential contribution of the stressinduced separation of partial dislocations to the observed early yielding at the low strain levels employed in this study. It also raises the possibility that de-twinning events could be operative during load reversal.

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Section: Resultsmentioning

confidence: 99%

On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

et al. 2016

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“…[1][2][3][4][5][6][7] With increasing e ac eq , deformation is facilitated initially by dislocation multiplication, followed by twinning or martensitic transformations, providing barriers for further dislocation slip. [1][2][3][4][5][6][7] Austenite with a relatively low stability can transform by means of c fi e fi a 0 martensitic transformations, resulting in a high work-hardening rate. Stability against c fi e-martensite transformation often implies stability against c fi (e fi) a 0 -martensite transformation.…”

Section: Discussionmentioning

confidence: 99%

“…One of the latest developments is austenitic Mn-based twinning induced plasticity (TWIP) steels, which combine high strength with high ductility. These superior mechanical properties are a result of deformation mechanisms involving twinning or plasticity-induced transformation [1][2][3][4][5][6] related to the austenite (c) stability. The deformation mechanisms in these Mn-based TWIP steels have been most intensively investigated for tensile straining, [3][4][5][6] leaving the role of large strain on the twinning or transformation-induced plastic deformation mechanism less exposed.…”

Section: Introductionmentioning

confidence: 99%

“…These superior mechanical properties are a result of deformation mechanisms involving twinning or plasticity-induced transformation [1][2][3][4][5][6] related to the austenite (c) stability. The deformation mechanisms in these Mn-based TWIP steels have been most intensively investigated for tensile straining, [3][4][5][6] leaving the role of large strain on the twinning or transformation-induced plastic deformation mechanism less exposed. [7] In the present work, the effect of both deep drawing and tensile straining on the defect and microstructure evolution in Mn-based TWIP steels was experimentally investigated using magnetic measurements, X-ray diffraction (XRD), and positron annihilation.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Deformation Mechanisms in Deep-Drawn and Tensile-Strained Austenitic Mn-Based Twinning Induced Plasticity (TWIP) Steel

Tol

Zhao

Schüt

et al. 2012

Metall Mater Trans A

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The effect of strain on the deformation mechanisms in an austenitic Mn-based twinning induced plasticity (TWIP) steel is investigated using magnetic measurements, XRD, positron beam Doppler spectroscopy, and finite element method simulations. The experimental observations reveal the formation of a 0 -martensite at specific degrees of deformation, despite the high stacking fault energy (SFE) of the material (52 mJ/m 2 ). The observed fraction a 0 -martensite is consistent with the estimated fraction of intersected shear bands acting as preferred nucleation sites for a 0 -martensite formation as a function of accumulated equivalent strain.

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“…Indeed Hadfield steel is a remarkable engineering alloy which in fully solutionized form is soft and ductile but when deformed, it work hardens rapidly. Work hardening mechanisms, impact wear, abrasive wear and the alloying of austenitic manganese steel have been investigated by several researchers and results have shown that under repeated impact and abrasive wear it work hardens rapidly and displays remarkable toughness [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] . Several other works on its surface treatment have also proved that surface treatment increases its surface hardness and wear resistance [22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Workhardening behaviour and microstructural analysis of failed austenitic manganese steel crusher jaws

2013

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This study focussed on the work hardening behaviour and microstructure of austenitic manganese steel relative to premature failure of crusher jaws. Samples of sound and failed crusher jaws were taken, the change with depth from the working surface to the sample core was measured and their microstructures observed. The study revealed a sharp hardness gradient in the failed crusher jaws, and presence of large carbides at both the austenite grain boundaries and in the austenite matrix. The failure of crusher jaws was attributed to brittle fracture as a result of precipitates of carbides from the inability of precipitated carbides to absorb shock during impact working. Finally, we conclude that the failure occurred as a result of inadequate quenching operations during the manufacturing process that resulted in the formation of carbide precipitates which embrittle the austenitic manganese steel, reduce its ability to withstand shock and create a non uniform plastic flow as it is work hardening.

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Strain hardening and heterogeneous deformation during twinning in Hadfield steel

Cited by 128 publications

References 28 publications

On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

Investigation of Deformation Mechanisms in Deep-Drawn and Tensile-Strained Austenitic Mn-Based Twinning Induced Plasticity (TWIP) Steel

Workhardening behaviour and microstructural analysis of failed austenitic manganese steel crusher jaws

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