Structure and mechanical properties of dual-phase steel following heat treatment simulations reproducing a continuous annealing line

Radwański, Krzysztof; Kuziak, R.; Rozmus, R.

doi:10.1016/j.acme.2018.12.006

Cited by 20 publications

(17 citation statements)

References 33 publications

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“…The IQ factor represented a quantitative description of the sharpness of the bands in the EBSD pattern. A lattice distorted by crystalline defects, such as dislocations, subgrain boundaries, and internal stresses affected a Kikuchi pattern quality leading to lower IQ values [19,23]. In the present study, the following maps were analyzed: IQ image quality maps, phase distribution maps, crystallographic orientation distribution (inverse pole figure), misorientation angle maps, and kernel misorientation maps.…”

Section: Materials and Experimental Techniquesmentioning

confidence: 99%

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Microstructure Evolution and Mechanical Stability of Retained Austenite in Medium-Mn Steel Deformed at Different Temperatures

et al. 2019

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The temperature-dependent microstructure evolution and corresponding mechanical stability of retained austenite in medium-Mn transformation induced plasticity (TRIP) 0.17C-3.1Mn-1.6Al type steel obtained by thermomechanical processing was investigated using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD) techniques. Specimens were deformed up to rupture in static tensile tests in the temperature range 20–200 °C. It was found that an increase in deformation temperature resulted in the reduced intensity of TRIP effect due to the higher stability of retained austenite. The kinetics of strain-induced martensitic transformation was affected by the carbon content of retained austenite (RA), its morphology, and localization in the microstructure.

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Section: Materials and Experimental Techniquesmentioning

confidence: 99%

“…Therefore, the electron backscatter diffraction (EBSD) method was also applied to show a general tendency. EBSD in comparison to the XRD method was not affected by a crystallographic orientation or texture [19,20,21]. Moreover, it can provide not only the amount of retained austenite but also distribution and morphology of the γ phase.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Mechanical Stability of Retained Austenite in Medium-Mn Steel Deformed at Different Temperatures

et al. 2019

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“…The presence of retained austenite is due to its high thermal stability revealing during heat treatment. Its stability is influenced by carbon and manganese contents in the austenite, a morphology, dislocation density and the neighborhood of soft or hard phases [7][8][9]. These factors determine the amount of retained austenite present in the microstructure and resulting mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments

et al. 2020

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The work presents results of phase transformation kinetics of hot-rolled 5% Mn steel subjected to different heat treatments. Three different schedules were introduced: isothermal holding in a bainite region, coiling simulation and intercritical annealing. The evolution of microstructure components was investigated using dilatometric and metallographic analyses. According to obtained results, the medium-Mn steel exhibits high resistance for γ/α transformation during the bainite transformation and coiling simulation (upon cooling from the austenite region). During 5 h isothermal holding, no bainite and/or ferrite formation was detected. This results in the formation of martensite upon cooling to room temperature. Differently, when the steel was subjected to the intercritical annealing at 720 and 700 °C (upon heating from room temperature), a final microstructure consisted of ferrite, martensite and retained austenite. At 700 °C, no fresh martensite formation was detected upon cooling to room temperature. This means that the austenite was enriched in carbon during the intercritical annealing step enough to keep its thermal stability.

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“…If the SFE is from 12 to 20 mJm −2 , a partial transformation of the austenite into martensite occurs, taking advantage of the Transformation Induced Plasticity (TRIP) effect [8][9][10][11]. The SFE from 20 to 60 mJm −2 favors intense mechanical twinning related to the TWIP effect [12][13][14][15]. At the SFE values higher than ca.…”

Section: Introductionmentioning

confidence: 99%

“…60 mJm −2 , the partition of dislocations into partial Shockley dislocations is difficult, and therefore the glide of perfect dislocations is the dominant deformation mechanism. A high impact on the dominating deformation mechanism has also been made by the temperature, strain rate, and grain size [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Grain Size on the Microstructure and Strain Hardening Behavior of Solution Heat-Treated Low-C High-Mn Steel

et al. 2020

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The low-carbon high-Mn austenitic steel microalloyed with titanium was investigated in this work. The steel was solution heat-treated at different temperatures in a range from 900 to 1200 °C. The aim was to receive a different grain size before the static tensile test performed at room temperature. The samples of different grain sizes showed the different strain hardening behavior and resulting mechanical properties. The size of grain diameter below 19 μm was stable up to 1000 °C. Above this temperature, the very enhanced grain growth took place with the grain diameter higher than 220 μm at 1200 °C. This huge grain size at the highest temperature resulted in the premature failure of the sample showing the lowest strength properties at the same time. Correlations between the grain size, the major strengthening mechanism, and fracture behavior were addressed. The relationships were assessed based on microstructural investigations and fractography tests performed for the deformed samples. The best combination of strength and ductility was found for the samples treated at 1000–1100 °C.

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Structure and mechanical properties of dual-phase steel following heat treatment simulations reproducing a continuous annealing line

Cited by 20 publications

References 33 publications

Microstructure Evolution and Mechanical Stability of Retained Austenite in Medium-Mn Steel Deformed at Different Temperatures

Microstructure Evolution and Mechanical Stability of Retained Austenite in Medium-Mn Steel Deformed at Different Temperatures

Dilatometric Study of Phase Transformations in 5 Mn Steel Subjected to Different Heat Treatments

Effect of Grain Size on the Microstructure and Strain Hardening Behavior of Solution Heat-Treated Low-C High-Mn Steel

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