Processing maps for hot deformation of a high-Mn TWIP steel: A comparative study of various criteria based on dynamic materials model

Di, Hongshuang; Mao, Ke; Wang, Xiaoyu; Han, Zhijie; Ma, Tianjun

doi:10.1016/j.msea.2013.08.036

Cited by 39 publications

(16 citation statements)

References 49 publications

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“…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%

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: 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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“…Flow curve which exhibits a steady state is generally associated with dynamic recovery as the dominant restoration mechanism. 16) All the tests performed at lower strain rate (0.01 s − 1 and 0.1 s − 1 at 850-1 050°C) show a peak, followed by softening. The stress peaks shift to higher strain with increasing strain rate at a fixed temperature.…”

Section: Flow Stress Behaviormentioning

confidence: 95%

Modelling of Flow Stress and Prediction of Workability by Processing Map for Hot Compression of 43CrNi Steel

Kumar

Rajput

et al. 2017

ISIJ International

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The isothermal hot compression tests of 43CrNi steel was carried out at temperatures 800°C to 1 050°C at an interval of 50°C and at constant strain rates of 0.01, 0.1, 1.0 and 10 s − 1 for total true strain of 0.7. The values of experimental stress were corrected for adiabatic heating which was used for flow stress modeling, and further its predictability was verified with experimental results. The true stress-true strain curves exhibit peak stresses followed by softening due to occurrence of DRX. The activation energy was calculated based on sinh type equation and found to be increasing with increase in strain. The obtained stress exponent 5.4, suggests that the mechanism of hot deformation is dislocation glide controlled by dislocation climb. Strain rate sensitivity maps and processing maps were developed using dynamic materials model (DMM), modified DMM with different instability criteria. The instability parameter, κ j , is directly related to the dissipative function which is associated to microstructural changes, J, whereas the instability parameters, ξ and κ, are associated with the strain rate sensitivity parameter, m. Therefore, the instability parameter, κ j , is more mathematically precise as it eliminates m from its calculations. The microstructures of deformed specimens were studied and correlated with the domains of processing maps to validate the workability region.KEY WORDS: medium carbon low alloy steel; processing maps; hot deformation; constitutive analysis; thermo mechanical simulator.

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“…[3,4] The specific energy absorption value of the TWIP steels was about 0.5 J/mm 3 , whereas the values of the conventional deep drawing steels were only between 0.16 and 0.25 J/mm 3 . [5] The deformation twins were considered to be responsible to the excellent mechanical properties.…”

Section: Abstract: High Manganese Steels Deformation Microstructurementioning

confidence: 97%

Cracking in a Fe–25Mn–3Si–3Al Steel

Fang

Zhang

Liu

et al. 2014

Materials Research Letters

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Processing maps for hot deformation of a high-Mn TWIP steel: A comparative study of various criteria based on dynamic materials model

Cited by 39 publications

References 49 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

Modelling of Flow Stress and Prediction of Workability by Processing Map for Hot Compression of 43CrNi Steel

Cracking in a Fe–25Mn–3Si–3Al Steel

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