The influence of temperature on the strain-hardening behavior of Fe-22/25/28Mn-3Al-3Si TRIP/TWIP steels

Pierce, D.T.; Benzing, Jake T.; Jiménez, José Antonio; Hickel, Tilmann; Bleskov, Ivan; Keum, Jong K.; Raabe, Dierk; Wittig, J. E.

doi:10.1016/j.mtla.2022.101425

Cited by 10 publications

(3 citation statements)

References 51 publications

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“…It is related to the temperaturedependent increase of SFE. [9,10] The deformation twins act as obstacles for dislocation motion leading to a decrease in the dislocation glide distance and as a result, an increase in strain hardening rate is observed. [1] The reduction of TEl at 200 °C is related to the limited intensity of TWIP effect and more pronounced contribution of dislocation slip to strain hardening.…”

Section: Mechanical Properties and Phase Compositionmentioning

confidence: 99%

“…The TRIP and TWIP effects occur within specific ranges of the stacking fault energy (SFE), which strongly depends on the chemical composition of steel and deformation temperature. [7][8][9][10] The deformation behavior of high-Mn steel depends on SFE of austenite. With increasing SFE, the strengthening mechanisms change from martensitic transformation (for the SFE lower than 25 mJ m À2 ) to mechanical twinning (for the SFE in a range of 25-60 mJ m À2 ).…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Prediction and Experimental Verification of Transformation‐Induced Plasticity/Twinning‐Induced Plasticity Effects in Advanced Low‐C High‐Mn Steel at Different Deformation Temperatures

Kozłowska,

Opara,

Stawarczyk

et al. 2024

Adv Eng Mater

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The effectiveness of TRIP/TWIP effects in Fe‐0.06C‐26Mn‐3Si‐3Al advanced ferrous alloy was analysed over a wide temperature range of ‐40°C‐200°C. The specific deformation mechanisms in the steel were experimentally investigated and predicted using thermodynamic calculations of stacking fault energy. These predictions were correlated with the microstructure of steel and its mechanical behaviour. The study found that applied thermodynamic models effectively predict the occurrence of TRIP/TWIP effects at different deformation temperatures, aligning well with experimental observations in terms of ε/α' martensite formation, indicative of the TRIP mechanism. Some discrepancies in SFE results were observed at Mn contents significantly higher or lower than the nominal composition of steel.This article is protected by copyright. All rights reserved.

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Section: Mechanical Properties and Phase Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic Prediction and Experimental Verification of Transformation‐Induced Plasticity/Twinning‐Induced Plasticity Effects in Advanced Low‐C High‐Mn Steel at Different Deformation Temperatures

Kozłowska,

Opara,

Stawarczyk

et al. 2024

Adv Eng Mater

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“…High mechanical properties of this group of steels depend on the chemical composition, in particular on Mn concentration (from 15% to 30%), which determines the main strengthening mechanism during technological forming [9]. High hardening rate of these steels and good plasticity result from straininduced martensitic transformation [10][11][12] or mechanical twinning [13][14][15]. The problem for wider use of this group of steels is insufficient hot ductility -especially above 1100°C [16][17][18] -and susceptibility to initiation and propagation of cracks in the surface layer of the ingot obtained with the use of continuous casting [19,20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Non-Metallic Inclusions on the Hot Ductility of High-Mn Steels

Opiela¹,

Fojt-Dymara²

2023

Adv. Sci. Technol. Res. J.

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The aim of the work was to determine the effect of non-metallic inclusions on the hot ductility of two newly . For this purpose, a hot tensile test was carried out in the temperature range from 1050°C to 1200°C with a constant strain rate of 2.5⸱10 -3 s -1 . The tests were performed on the Gleeble 3800 thermomechanical simulator. Hot ductility of tested steels was defined by determining the reduction in area (% RA). Examined steels demonstrate diversified hot ductility. Clearly higher hot ductility was noted for the 24Mn-3Si-1.5Al-Ti steel. The reduction in area of this steel in the temperature range from 1050°C to 1200°C decreases from approx. 90% to about 58%, while the reduction in area of the 27Mn-4Si-2Al steel, in the same temperature range, decreases from approx. 66% to about 34%. The presence of single, regular-shaped AlN particles and complex MnS-AlN-type non-metallic inclusions was revealed in the 27Mn-4Si-2Al steel. Whereas fine (Ce, La, Nd)S-type sulphides, properly modified with rare earth elements, were identified in the 24Mn-3Si-1.5Al-Ti steel. The AlN-type inclusions and complex MnS-AlN-type inclusions were not revealed in the 24Mn-3Si-1.5Al-Ti steel. This is due to the presence of Ti microaddition, the concentration of which guaranteed binding of the whole nitrogen into stable TiN-type nitrides. Sulphides, disclosed in the 24Mn-3Si-1.5Al-Ti steel, are globular or slightly elongated in the direction of plastic deformation, as confirmed by a very low value of the elongation factor equal 1.48. This creates the opportunity to produce sheets of high strength and ductility and low anisotropy of mechanical properties.

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Microstructure evolution and strain hardening behavior of thermomechanically processed low-C high-manganese steels: an effect of deformation temperature

Kozłowska

Stawarczyk

Grajcar

et al. 2023

Archiv.Civ.Mech.Eng

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Effects of reduced (– 40 °C), ambient (20 °C), and elevated (200 °C) deformation temperatures on the microstructure evolution and strain hardening behavior of two low-C thermomechanically processed high-manganese steels were studied. The microstructure was characterized by means of scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM) techniques. The temperature-dependent tendency of austenite to strain-induced ε/α′-martensitic transformation and mechanical twinning was qualitatively and quantitatively assessed using the EBSD technique. The steel containing 26 wt% of Mn showed the beneficial strength–ductility balance at reduced deformation temperature -40 °C due to the intense Transformation-Induced Plasticity (TRIP) effect which resulted in the formation of significant ε- and α′-martensite fractions during tensile deformation. The mechanical properties of steel containing 27 wt% of Mn were more beneficial at elevated deformation temperature 200 °C due to the occurrence of intense Twinning-Induced Plasticity (TWIP) effect expressed by the presence of significant fraction of mechanical twins. Moreover, at the highest deformation temperature 200 °C, the evidence of thermally activated processes affecting the mechanical behavior of the higher Mn steel was identified and described.

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The influence of temperature on the strain-hardening behavior of Fe-22/25/28Mn-3Al-3Si TRIP/TWIP steels

Cited by 10 publications

References 51 publications

Thermodynamic Prediction and Experimental Verification of Transformation‐Induced Plasticity/Twinning‐Induced Plasticity Effects in Advanced Low‐C High‐Mn Steel at Different Deformation Temperatures

Thermodynamic Prediction and Experimental Verification of Transformation‐Induced Plasticity/Twinning‐Induced Plasticity Effects in Advanced Low‐C High‐Mn Steel at Different Deformation Temperatures

Effect of Non-Metallic Inclusions on the Hot Ductility of High-Mn Steels

Microstructure evolution and strain hardening behavior of thermomechanically processed low-C high-manganese steels: an effect of deformation temperature

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