Mechanical behavior of carbon steels during continuous casting

Kim, Kyung-Hyun; Oh, Kyu Hwan; Lee, Dong Nyung

doi:10.1016/1359-6462(95)00497-1

Cited by 26 publications

(13 citation statements)

References 13 publications

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“…The following relation is obtained. [39] the brittle temperature range increases largely due to the 3JЈ 2 ϭ 2 o ϭ 2 fs severe segregation of solute elements at the final stage of solidification, which is influenced by the cooling rate. [8] …”

Section: B Critical Strain For Internal Crack Formationmentioning

confidence: 99%

“…The T L and T Ar4 are calculated using the followstrain as a function of the brittle temperature range and strain ing equations. [39,40,41] rate has been proposed with the experimentally measured data by previous researchers. [11][12][13][14][15] The thermomechanical T L (ЊC) ϭ 1536 Ϫ 78(wt pct C) Ϫ 7.6(wt pct Si) behavior of the mushy zone has been analyzed using the Ϫ 4.9(wt pct Mn) Ϫ 34.4(wt pct P) Ϫ 38(wt pct S) [1] equation for critical strain, microsegregation analysis, and constitutive equations for flow stresses of ␦ phase and ␥ T Ar4 (ЊC) ϭ 1392 ϩ 1122(wt pct C) Ϫ 60(wt pct Si) [2] phase.…”

Section: Introductionmentioning

confidence: 99%

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A new criterion for internal crack formation in continuously cast steels

Won

Yeo

Seol

et al. 2000

Metall Mater Trans B

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163

161

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To estimate the cracking condition in continuously cast steels, a new model for critical fracture stress given from the measured critical strain has been proposed, which can take into account the brittle temperature range and strain rate. The effects of brittle temperature range and strain rate on critical strain for internal crack formation were analyzed. When the brittle temperature range and strain rate were increased, the possibility of internal crack formation increased due to the decreasing critical strain. To describe the thermomechanical property model of the mushy zone between zero strength temperature (ZST) and zero ductility temperature (ZDT), the yield criterion for porous metals, which can take into account ␦/␥ transformation, was used. Using the fitting equation for the measured critical strain and the microsegregation analysis, the thermomechanical behavior of the mushy zone could be successfully described by the proposed model, which incorporates the effects of microsegregation of solute elements and ␦/␥ transformation on hot tear during solidification at the given range of steel compositions and strain rates. A cracking criterion based on the difference of deformation energy in the brittle temperature range is proposed to explain the cracking phenomenon of whole carbon range.

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Section: B Critical Strain For Internal Crack Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new criterion for internal crack formation in continuously cast steels

Won

Yeo

Seol

et al. 2000

Metall Mater Trans B

Self Cite

163

161

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show abstract

“…Gleeble thermosimulator systems are efficient tools for this subject, as they provide means for characterizing metals at a high temperature, under vacuum, and along complex thermal-mechanical paths. [7,8] However, it should be noted that, as reported in literature, [7][8][9] thermal gradients always exist at a high temperature in Gleeble-type tension or compression specimens. Because the mechanical properties of steel are temperature dependent, such thermal gradients become the source of deformation heterogeneities in specimens.…”

Section: Introductionmentioning

confidence: 87%

A Coupled Electrical–Thermal–Mechanical Modeling of Gleeble Tensile Tests for Ultra-High-Strength (UHS) Steel at a High Temperature

Zhang

Bellet

Bobadilla

et al. 2010

Metall Mater Trans A

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A coupled electrical-thermal-mechanical model is proposed aimed at the numerical modeling of Gleeble tension tests at a high temperature. A multidomain, multifield coupling resolution strategy is used for the solution of electrical, energy, and momentum conservation equations by means of the finite element method. Its application to ultra-high-strength steel is considered. After calibration with instrumented experiments, numerical results reveal that significant thermal gradients prevail in Gleeble tensile steel specimen in both axial and radial directions. Such gradients lead to the heterogeneous deformation of the specimen, which is a major difficulty for simple identification techniques of constitutive parameters, based on direct estimations of strain, strain rate, and stress. The proposed direct finite element coupled model can be viewed as an important achievement for subsequent inverse identification methods, which should be used to identify constitutive parameters for steel at a high temperature in the solid state and in the mushy state.

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“…The Gleeble TM , 1 thermo-simulator systems are efficient tools for the subject, as they provide the means for characterizing mechanical properties of metals at high temperature, under vacuum and along complex thermalmechanical testing paths. Regarding parameter identification for steel at very high temperature, low strain rate and low strain, it has been achieved by using the forcedisplacement curves recorded on Gleeble thermo-simulators, under the assumption of uniform stress, strain and strain-rates in the deformed region of the specimen [7,8]. However, it should be noted that as reported in literature [7][8][9], thermal gradients always exist at high temperature in Gleeble-type specimens.…”

Section: Introductionmentioning

confidence: 98%

“…Regarding parameter identification for steel at very high temperature, low strain rate and low strain, it has been achieved by using the forcedisplacement curves recorded on Gleeble thermo-simulators, under the assumption of uniform stress, strain and strain-rates in the deformed region of the specimen [7,8]. However, it should be noted that as reported in literature [7][8][9], thermal gradients always exist at high temperature in Gleeble-type specimens. Because the mechanical properties of steel are temperature dependent, such thermal gradients are the source of deformation heterogeneity in specimens.…”

Section: Introductionmentioning

confidence: 98%

Inverse finite element modelling and identification of constitutive parameters of UHS steel based on Gleeble tensile tests at high temperature

Zhang

Bellet

Bobadilla

et al. 2011

Inverse Problems in Science and Engineering

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The authors are grateful to the publisher, Taylor & Francis, for letting the manuscript being archived in this Open Access repository. This is an electronic version of an article that was published in Inverse Problems in Science and Engineering© 2011 Copyright: Taylor & Francis. Inverse Problems in Science and Engineering is available online at: http://www.tandfonline.com/doi/abs/10.1080/17415977.2010.518288International audienceThe rheological behaviour of an ultra high strength (UHS) steel is investigated by Gleeble tensile tests at low-deformation rates and high temperature, from 1200°C to solidus temperature. Results show that large thermal gradients exist in specimens, resulting in heterogeneous deformation, which makes the identification of constitutive parameters difficult from the directly deduced nominal stress-strain curves. The advantages of an inverse identification method - associating a direct finite element model of Gleeble tests and an optimization module - are demonstrated in such conditions. The constitutive parameters identified by this technique have been successfully applied to additional tests, more complex in nature than those used for the identification of parameters. However, such tests combining successive loading and relaxation stages have revealed some limitations of the considered constitutive model

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Mechanical behavior of carbon steels during continuous casting

Cited by 26 publications

References 13 publications

A new criterion for internal crack formation in continuously cast steels

A new criterion for internal crack formation in continuously cast steels

A Coupled Electrical–Thermal–Mechanical Modeling of Gleeble Tensile Tests for Ultra-High-Strength (UHS) Steel at a High Temperature

Inverse finite element modelling and identification of constitutive parameters of UHS steel based on Gleeble tensile tests at high temperature

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