High manganese austenitic twinning induced plasticity steels: A review of the microstructure properties relationships

Bouaziz, Olivier; Allain, Sébastien; Scott, Colin; Cugy, P.; Barbier, D.

doi:10.1016/j.cossms.2011.04.002

Cited by 1,203 publications

(633 citation statements)

References 137 publications

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“…The development of technological routes involving cold working for producing TWIP-steels with the beneficial combination of strength and ductility requires detailed investigation of the mechanisms of microstructure evolution during deformation and careful analysis of the strain-hardening mechanisms. Recent studies on TWIP steels with various manganese contents have revealed the common sequence of structural changes during cold rolling [5,25,27,28]. Following a rapid increase in the dislocation density at an early deformation, the deformation twinning progressively develops throughout the deformation microstructures at low to medium strains, whereas shear banding occurs at rather high strains.…”

Section: Introductionmentioning

confidence: 99%

“…The major shortcoming of high-Mn austenitic steels is their relatively low YS, which is associated with the recrystallized microstructure that evolves after conventional thermo-mechanical processing (TMP) [25,26]. Generally, the YS can be increased by an appropriate cold working at the expense of ductility [25].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the YS can be increased by an appropriate cold working at the expense of ductility [25]. The development of technological routes involving cold working for producing TWIP-steels with the beneficial combination of strength and ductility requires detailed investigation of the mechanisms of microstructure evolution during deformation and careful analysis of the strain-hardening mechanisms.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure evolution and strengthening mechanisms of Fe–23Mn–0.3C–1.5Al TWIP steel during cold rolling

Kusakin

Belyakov

Haase

et al. 2014

Materials Science and Engineering: A

118

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a b s t r a c tThe effect of cold rolling on the microstructure evolution and mechanical properties of Fe-23Mn-0.3C-1.5Al twinning-induced plasticity (TWIP) steel was studied. The extensive mechanical twinning subdivides the initial grains into nanoscale twin lamellas. In addition, the formation of deformation micro bands at ε440% induces the formation of nanostructured bands of localized shear. It is demonstrated that the mechanical twinning is notably important for dislocation storage within the matrix, as the twin boundaries act as equally effective obstacles to dislocation glide as conventional high-angle grain boundaries. However, the contribution of the grain size strengthening to the overall yield stress (YS) is much smaller than that of the deformation strengthening, which plays a major role in the superior work-hardening behavior of TWIP steels. A very high dislocation density of $ 2 Â 10 15 m À 2 is achieved after plastic deformation with moderate strains. The superposition of deformation strengthening and grain boundary strengthening leads to an increase in the YS from 235 MPa in the initial state to 1400 MPa after 80% rolling.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure evolution and strengthening mechanisms of Fe–23Mn–0.3C–1.5Al TWIP steel during cold rolling

Kusakin

Belyakov

Haase

et al. 2014

Materials Science and Engineering: A

118

View full text Add to dashboard Cite

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“…Stability against c fi e-martensite transformation often implies stability against c fi (e fi) a 0 -martensite transformation. [19,20] According to Olson and Cohen, [15,16] however, a low SFE promotes strain-induced nucleation of a 0 -martensite, but does not necessarily require the intermediate formation of e-martensite. XRD confirmed the absence of e-martensite.…”

Section: Discussionmentioning

confidence: 99%

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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“…In order to promote a TWIP effect, the SFE values have range between 12-35 mJ/m 2 (Ref 4). The high strength attained by TWIP steels is attributed to a dynamic Hall-Petch effect (Ref 3,6,7): deformation progresses by the formation of twins which act as obstacles for dislocation gliding. This process results in a limitation of the dislocation mean free path, leading to a high hardening behavior while large ductility is due to the plasticity promoted by the twinning transformation.…”

Section: Introductionmentioning

confidence: 99%

Twin-Induced Plasticity of an ECAP-Processed TWIP Steel

Wang

Benito

Calvo

et al. 2016

J. of Materi Eng and Perform

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The TWIP steels show high strain hardening rates with high ductility which results in high ultimate tensile strength. This makes their processing by equal channel angular pressing very difficult. Up to now, this has only been achieved at warm temperatures (above 200°C). In this paper, a FeMnCAl TWIP steel has been processed at room temperature and the resulted microstructure and mechanical properties were investigated. For comparison, the material has also been processed at 300°C. The TWIP steel processed at room temperature shows a large increase in yield strength (from 590 in the annealed condition to 1295 MPa) and the ultimate tensile strength (1440 MPa) as a consequence of a sharp decrease in grain size and the presence within the grains of a high density of mechanical twins and subgrains. This dense microstructure results also in a loss of strain hardening and a reduction in ductility. The material processed at 300°C is more able to accommodate deformation and has lower reduction in grain size although there is a significant presence of mechanical twins and subgrains produced by dislocation activity. This material reaches an ultimate tensile strength of 1400 MPa with better ductility than the room temperature material.

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High manganese austenitic twinning induced plasticity steels: A review of the microstructure properties relationships

Cited by 1,203 publications

References 137 publications

Microstructure evolution and strengthening mechanisms of Fe–23Mn–0.3C–1.5Al TWIP steel during cold rolling

Microstructure evolution and strengthening mechanisms of Fe–23Mn–0.3C–1.5Al TWIP steel during cold rolling

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

Twin-Induced Plasticity of an ECAP-Processed TWIP Steel

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