Some aspects of high manganese twinning-induced plasticity (TWIP) steel, a review

Chen, Liqing; Zhao, Yang; Qin, Xiaomei

doi:10.1007/s40195-012-0501-x

Cited by 151 publications

(80 citation statements)

References 53 publications

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“…It is worth noting that the deformation twinning may act as obstacles against dislocation movement thereby increasing the rate of work hardening, but this would be masked by the higher contribution of α'-martensite formation in strain hardening. This is completely in agreement with the previous report by Qin et al [22]. However, in the present case, the twin boundaries may effectively act as nucleation sites for martensitic transformation in lower BF structures.…”

Section: Resultssupporting

confidence: 94%

The sequential twinning-transformation induced plasticity effects in a thermomechanically processed high Mn austenitic steel

Sabzi

Zarei-Hanzaki

Abedi

et al. 2018

Materials Science and Engineering: A

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Different initial microstructures with various bimodal grain size distributions (BGSD) were produced in a high Mn austenitic steel through applying a predetermined set of thermomechanical processing cycles. The corresponding room temperature mechanical properties and the related strain hardening behaviors were assessed using tensile testing method. The results indicated that in the microstructure with high grain size bimodality, the length and amplitude of rapid hardening region was well higher than the others. This was attributed to its higher capability to α'-martensite formation. In addition, the threshold strain to initiate martensitic transformation was shifted to the lower one in the microstructure with higher bimodal grain size distribution. The latter was related to the lower arisen back stresses in the interior regions of the coarser grains. Furthermore, different transformation paths were identified as the BGSD changed. The austenite could directly transform to α'-martensite (γ α') in the microstructure with lower BGSD; in this case the α'-martensite mainly appeared at the intersections of deformation twins. In contrast, in microstructures with higher BGSD, the nucleation occurred at the intersections of ε-martensite platelets. The co-existence of these transformation paths provided an extended transformation induced plasticity effect ending to a higher elongation to fracture in the course of deformation. In order to summarize the contribution of various strain hardening mechanisms, a deformation map was also constructed. Accordingly, the enhanced ductility/strength properties were attributed to the sequential operation of extended transformation induced plasticity and twinning induced plasticity effects.

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Section: Resultssupporting

confidence: 94%

The sequential twinning-transformation induced plasticity effects in a thermomechanically processed high Mn austenitic steel

Sabzi

Zarei-Hanzaki

Abedi

et al. 2018

Materials Science and Engineering: A

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“…High-Mn steel with twinning induced plasticity effect (TWIP) has captured the industry attention due to its excellent combination of mechanical properties [1][2][3]. The TWIP-effect is attributed to the formation of deformation twins with nanometer thickness.…”

Section: Introductionmentioning

confidence: 99%

Influence of cold forging and annealing on microstructure and mechanical properties of a high-Mn TWIP steel

Kusakin¹,

Kalinenko²,

TSUZAKI³

et al. 2017

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The influence of cold biaxial forging and annealing on the microstructure evolution and mechanical properties of Fe-18Mn-0.6C-0.1N TWIP steel was investigated. The microstructure after thermomechanical treatment was examined by means of scanning electron microscopy (SEM) with electron back-scatter diffraction (EBSD) analyzer and transmission electron microscopy (TEM). The microstructure containing a high density of deformation twins was evolved by cold forging. Then, the deformation microstructure was recovered or partially recrystallized during subsequent annealing for 1 h at 673 or 873 K, respectively. The cold biaxial forging followed by partial recrystallization resulted in a very attractive combination of mechanical properties. The yield strength and the ultimate tensile strength of the steel after cold biaxial forging were 1320 and 1540 MPa, respectively, with elongation of 6 %. On the other hand, the yield and ultimate tensile strengths of 770 and 1110 MPa, respectively, and elongation about 40 % were obtained after partial recrystallization. The as-forged and recovery annealed samples showed fatigue limit of 600 and 550 MPa, respectively, and the sample after partial recrystallization showed slightly lower fatigue limit of 500 MPa.K e y w o r d s : TWIP-steel, deformation twinning, microstructure, mechanical properties, fatigue

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“…Over last years, the twinning -induced plasticity Fe-Mn-C (TWIP) steels have been the center of intensive research works due to their outstanding tensile strength -ductility combination which arises from the formation of extensive mechanical twinning under mechanical loads Cornette et al, 2005;Scott et al, 2006;Bouaziz et al, 2008;Bouaziz et al, 2011;Galán et al, 2012;Gil Sevillano and De las Cuevas., 2012;Chen et al, 2013;De las Cuevas et al, 2014;Ghasri-Khouzani and McDermid, 2015;Pierce et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Pérdida de ductilidad debido a la descarburación y pérdida de Mn de un acero TWIP de tamaño de grano grosero

Jiménez

Sevillano

2017

REVMETAL

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A clear transition in the tensile ductility behavior has been observed for grain sizes D in the range of 15 μm -20 μm (1.50 μm ≤ D < 50 μm) in a 22% Mn, 0.6% C (in mass %) TWIP steel. This behavior is a combination of the intrinsic effect of grain size D on strength and work hardening rate of the material, with an extrinsic effect, superficial decarburization and Mn depletion processes occurred during annealing treatments at T ≥ 1000 ºC. In the present work, this extrinsic effect happened in TWIP steel has been studied in depth. GDOES (Glow Discharge Optical Emission Spectrometry) analyses have been carried out in order to study quantitatively the C and Mn concentration profiles. The depth of surface decarburization has been modeled by using Birks-Jackson theory. Two micro-constituents have been observed via Ferritoscope into decarburized volume: α'-martensite and γ-austenite. The ductility of coarse-grained TWIP steel, subjected for high annealing temperatures and long annealing times, declines as a consequence of the formation of α'-martensite and less stable γ-austenite with lower stacking fault energy, SFE, due to the Mn depletion in the decarburized volume. RESUMEN: Pérdida de ductilidad debido a la descarburación y pérdida de Mn de un acero TWIP de tamaño de grano grosero.Se ha observado una clara transición de la ductilidad a tracción con el tamaño de grano D del orden 15 μm -20 μm (1,50 μm ≤ D < 50 μm) en un acero TWIP, 22% de Mn, 0,6% de C (% en masa). Este comportamiento es una combinación de un efecto intrínseco del tamaño de grano D en la resistencia y el endurecimiento por deformación del material, con un efecto extrínseco, proceso de descarburación superficial y pérdida de Mn ocurrido durante los tratamientos de recocido a T ≥ 1000 ºC. En el presente trabajo se ha estudiado en profundidad este efecto extrínseco sucedido en el acero TWIP. Se han realizado análisis por GDOES (Espectroscopia Óptica de Descarga Luminiscente) para estudiar cuantitativamente los perfiles de concentración de C y Mn. La profundidad de descarburación superficial se ha modelizado usando la teoría de Birks-Jackson. Se ha observado vía ferritoscopio que, en el volumen descarburizado, coexisten dos microconstituyentes: α'-martensita y γ-austenita. La ductilidad del acero TWIP de tamaño de grano grosero, sometido a altas temperaturas y largos tiempos de recocido, disminuye como consecuencia de la formación de α'-martensita y γ-austenita menos estable con menor energía de defectos de apilamiento, EDA, debido a la pérdida de Mn en el volumen descarburizado.

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Some aspects of high manganese twinning-induced plasticity (TWIP) steel, a review

Cited by 151 publications

References 53 publications

The sequential twinning-transformation induced plasticity effects in a thermomechanically processed high Mn austenitic steel

The sequential twinning-transformation induced plasticity effects in a thermomechanically processed high Mn austenitic steel

Influence of cold forging and annealing on microstructure and mechanical properties of a high-Mn TWIP steel

Pérdida de ductilidad debido a la descarburación y pérdida de Mn de un acero TWIP de tamaño de grano grosero

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