Effect of Deformation Temperature on Microstructure Evolution and Mechanical Properties of Low‐Carbon High‐Mn Steel

Grajcar, A.; Kozłowska, Aleksandra; Topolska, Santina; Morawiec, Mateusz

doi:10.1155/2018/7369827

Cited by 15 publications

(6 citation statements)

References 19 publications

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“…Thus, the volume fractions of the CuT component can be correlated with the densities of deformation twins. The constant high level of CuT volume fraction in the range from 25 • C to 300 • C indicates that twinning is the predominant deformation mechanism during rolling, which has also been reported by Grajcar et al [10]. The influence of this characteristic microstructure after rolling on the mechanical properties is shown in Figure 6.…”

Section: Discussionsupporting

confidence: 72%

“…Above 60 mJ/m 2 the deformation mechanism changes mainly to slip [9]. This dependency in behavior on temperature and therefore the SFE of the deformation mechanisms in high manganese TWIP steels was also reported by [10][11][12]. The presented results indicate a change of the predominant deformation mechanism from mechanical twinning to dislocation glide with increasing temperature.…”

Section: Introductionsupporting

confidence: 79%

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The Influence of Warm Rolling on Microstructure and Deformation Behavior of High Manganese Steels

Haupt

Müller

Haase

et al. 2019

Metals

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In this work, a Fe23Mn0.3C1Al high manganese twinning-induced plasticity (TWIP) steel is subjected to varying warm rolling procedures in order to increase the yield strength and maintain a notable ductility. A comprehensive material characterization allows for the understanding of the activated deformation mechanisms and their impact on the resulting microstructure, texture, and mechanical properties. The results show a significant enhancement of the yield strength compared to a fully recrystallized Fe23Mn0.3C1Al steel. This behavior is mainly dominated by the change of the active deformation mechanisms during rolling. Deformation twinning is very pronounced at lower temperatures, whereas this mechanism is suppressed at 500 °C and a thickness reduction of up to 50%. The mechanical properties can be tailored by adjusting rolling temperature and thickness reduction to desired applications.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionsupporting

confidence: 79%

The Influence of Warm Rolling on Microstructure and Deformation Behavior of High Manganese Steels

Haupt

Müller

Haase

et al. 2019

Metals

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“…Grajcar et al proposed similar strengthening behavior in low C Fe-28Mn-4Si-2Al steel. They suggested that the dominant mechanism responsible for the work-hardening changes as a function of deformation temperature or strain rate, which is related to SFE [30,31].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

The Influence of Warm Rolling Reduction on Microstructure Evolution, Tensile Deformation Mechanism and Mechanical Properties of an Fe-30Mn-4Si-2Al TRIP/TWIP Steel

Dong

Sun

Xia

et al. 2018

Metals

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The effects of warm rolling reduction ratio ranging from 20% to 55% on microstructure evolution, the tensile deformation mechanism, and the associated mechanical properties of an Fe-30Mn-4Si-2Al TRIP/TWIP steel were studied. The warm rolling process resulted in the formation and proliferation of sub-structure, comprising dislocations, deformation twins as well as shear bands, and the densities of dislocation and twins were raised along with the increase in rolling reduction. The investigated steel, with a fully recrystallized state, exhibited a single ε-TRIP effect during the room temperature tensile deformation, on top of dislocation glide. However, the formation and growth of twin lamellae and ε-martensite were detected simultaneously during tensile deformation of the warm rolled specimen with rolling reduction of 35%, leading to a good balance between high yield strength of 785 MPa, good total ductility of 44%, and high work hardening rate. As the rolling reduction increased to 55%, the specimen revealed a relatively low work hardening rate, due to the high dislocation density, and dislocation glide was the main deformation mechanism. As a result, a tensile deformation mechanism that started from a single ε-martensitic transformation moved to a bi-mode of ε-martensitic transformation accompanied with deformation twinning, and finally to dislocation glide with the increasing warm rolling reduction was proposed.

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“…One of such steel grades, meeting mentioned demands and properties, are austenitic high-manganese steels [3][4][5]. These steels most often consist of 0.02% to 0.65% C, 15% to 30% Mn and Al and Si with various concentrations [6][7][8][9], in some cases also Cr or microaddtions Nb and Ti [10][11]. Gradual course of strain induced martensitic transformation [12][13][14] and/or mechanical twinning [15][16][17][18] guarantees obtaining a particularly good combination of high strength and plasticity (YS 0.2 = 250/450 MPa; UTS = 600/900 MPa; UEl = 40/80%).…”

Section: Introductionmentioning

confidence: 99%

Hot Ductility of High-Mn Steel with Niobium and Titanium

Opiela,

Fojt-Dymara

2024

Adv. Sci. Technol. Res. J.

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The work presents the results of research on the effect of deformation parameters on hot ductility of high-Mn austenitic steel with niobium and titanium. The investigations were carried out on steel with 0.05% C, 24% Mn, 3.5% Si, 1.5% Al, 0.030% Nb and 0.075% Ti. Hot static tensile test was performed using Gleeble 3800 thermomechanical simulator. Samples were deformed in a temperature range from 1050 °C to 1200 °C with a strain rate of 3•10 -3 s -1 . The reduction in area (RA), determined in the static tensile test, was the basis for determining the hot ductility of the examined steel. Reduction in area of examined steel decreases from 88% at the temperature of 1050 °C to 59% at 1200 °C. High hot ductility of the investigated steel is the result of the synergy of chemical composition optimization, properly conducted modification of non-metallic inclusions and formed fine-grained microstructure of dynamically recrystallized austenite. In addition to hot ductility, parameters characterizing susceptibility of studied steel to high temperature cracking were also defined, namely: ductility recovery temperature (DRT), nil ductility temperature (NDT) and nil strength temperature (NST) were determined. The values of these temperatures are 1240 °C, 1250 °C and 1270 °C, respectively. This means that the temperature of the beginning of plastic deformation of ingots of this steel may be equal even slightly above 1200 °C. In addition, the high-temperature brittleness range (HTBR) was determined, which is equal 30 °C.

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Effect of Deformation Temperature on Microstructure Evolution and Mechanical Properties of Low‐Carbon High‐Mn Steel

Cited by 15 publications

References 19 publications

The Influence of Warm Rolling on Microstructure and Deformation Behavior of High Manganese Steels

The Influence of Warm Rolling on Microstructure and Deformation Behavior of High Manganese Steels

The Influence of Warm Rolling Reduction on Microstructure Evolution, Tensile Deformation Mechanism and Mechanical Properties of an Fe-30Mn-4Si-2Al TRIP/TWIP Steel

Hot Ductility of High-Mn Steel with Niobium and Titanium

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