Microstructure and Mechanical Properties of 18%Mn TWIP/TRIP Steels Processed by Warm or Hot Rolling

Belyakov, Andrey; Kaibyshev, Rustam; Torganchuk, Vladimir

doi:10.1002/srin.201600123

Cited by 14 publications

(15 citation statements)

References 21 publications

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“…The combination of the slip mechanism, also including cross slip, activated during warm rolling and the twinning mechanism activated during room temperature tensile testing results in excellent mechanical properties ( Figure 6). It is important to note that the dynamic recrystallization of the material during rolling, which typically occurs during hot rolling [8,13], was successfully prevented despite the comparably high temperature.…”

Section: Discussionmentioning

confidence: 99%

“…Warm rolling represents a promising alternative processing method to substantially increase the yield strength of high manganese steels [8]. Hence, the impact of warm rolling parameters on microstructure, texture and mechanical properties of a high manganese TWIP steel is investigated in the present study.…”

Section: Introductionmentioning

confidence: 99%

“…By rolling at elevated temperatures (higher SFE) and applying the warm-rolled material at room temperature (lower SFE), the contribution of mechanical twinning and dislocation slip can be tailored in both temperature-deformation regimes in order to achieve superior mechanical properties. In order to accomplish this, it is necessary to prevent dynamic recrystallization during rolling, which is typically observed during hot deformation of austenitic TWIP steels at temperatures above~750 • C [8,13].…”

Section: Introductionmentioning

confidence: 99%

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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: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…It has been reported that the TRIP effect in high‐manganese steels could result in superior mechanical properties, an excellent combination of high strength and good ductility, and high strain‐hardening capacity . There are mainly three high‐manganese steel groups, which have been intensively studied, namely Fe–Mn–Al–Si, Fe–Mn–C, and Fe–Mn–Al–C alloys. The chemical composition and corresponding SFE of some typical high‐manganese TRIP steels are listed in Table .…”

Section: Trip Effect In High‐manganese Steelsmentioning

confidence: 99%

The TRIP Effect and Its Application in Cold Formable Sheet Steels

Bleck

Guo

2017

steel research int.

162

100

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The Transformation-Induced-Plasticity (TRIP) effect is used for enhancing the formability of cold formable sheet steels. While the first observation of this phenomenon dates back to the 1930's, the industrial usage of the TRIP steels started after 1950. First fully austenitic steels, later on multiphase steels have been developed with a meta-stable austenitic phase that can transform stress-assisted or strain-induced into eor a 0 -martensite during deformation. The historic development, the principles of the TRIP effect, and the different groups of steels using the TRIP effect are described. For the already commercialized TRIP steels, characteristic chemical compositions and microstructures are discussed; the requirements for the process design as well as new annealing concepts after cold rolling are explained. . Since 2016, he has been working in the Steel Institute of RWTH Aachen University as a scientific researcher. His research topic focuses on the microstructuremechanical properties relationship of high-Mn and medium-Mn steels.

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“…The aim of this study is to clarify the hot deformation behavior of promising 18%Mn TWIP steels, which may exhibit a tensile elongation above 60% with a strength of more than 1000 MPa. [18] The study is particularly focused on the relationship between the DRX mechanisms and dislocation substructures upon hot working of steels with different contents of carbon, which is one of the main alloying elements of high-Mn TWIP steels, that strongly affects the mechanical properties. [8,10,[17][18][19][20][21] The deep understanding the mechanisms of microstructure evolution during hot working of structural steels and alloys is very important for the development of intelligent processing technologies providing semiproducts with controlled mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation and Dynamic Recrystallization of 18%Mn Twinning‐Induced Plasticity Steels

et al. 2020

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The deformation behavior of 18%Mn twinning‐induced plasticity (TWIP) steels with 0.4%C or 0.6%C is studied by means of isothermal compression tests in the temperature range of 973–1373 K at the strain rates of 10−3–10−1 s−1. The hot working is accompanied by the development of discontinuous dynamic recrystallization (DRX), which is commonly advanced by an increase in deformation temperature and/or a decrease in strain rate. A decrease in the carbon content promotes the DRX development, though the flow stresses scarcely depend on the carbon content. The change in the DRX kinetics results in the specific distributions of the grain orientation spread (GOS) among the DRX grains, depending on deformation conditions. The maximal fraction of grains with small GOS below 1° corresponding to rapid DRX development is observed at certain temperature/strain rate, although the DRX fraction increases with a decrease in temperature‐compensated strain rate and can be related to the fraction of grains with GOS below 4°. The texture of DRX grains is also determined by the orientations of grains with GOS below 4°. The grain boundary mobility for the DRX grain growth is characterized by an activation energy close to that for grain boundary diffusion.

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Microstructure and Mechanical Properties of 18%Mn TWIP/TRIP Steels Processed by Warm or Hot Rolling

Cited by 14 publications

References 21 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 TRIP Effect and Its Application in Cold Formable Sheet Steels

Hot Deformation and Dynamic Recrystallization of 18%Mn Twinning‐Induced Plasticity Steels

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