On the application of the additivity rule in pearlitic transformation in low alloy steels

Ye, J. S.; Hsu, T.Y.; Chang, Hongbing

doi:10.1007/s11661-003-0236-4

Cited by 17 publications

(8 citation statements)

References 27 publications

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“…[18][19][20] The essence of the additivity approximation is illustrated in path C in figure 1. Basically, the total time span, t = (T f -T S )/β, spent between the two temperature intervals T f and T s under a fixed scan rate β, is divided into n number of small isothermal steps with time interval Δt.…”

Section: Modelling Of Non-isothermal Transformation Kinetics: Additivmentioning

confidence: 99%

Kinetics of solid state phase transformations: Measurement and modelling of some basic issues

Raju

Mohandas

2010

J Chem Sci

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A brief review of the issues involved in modelling of the solid state transformation kinetics is presented. The fact that apart from the standard thermodynamic parameters, certain path variables like heating or cooling rate can also exert a crucial influence on the kinetic outcome is stressed. The kinetic specialties that are intrinsic to phase changes proceeding under varying thermal history are enumerated. A simple and general modelling methodology for understanding the kinetics of non-isothermal transformations is outlined.

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Section: Modelling Of Non-isothermal Transformation Kinetics: Additivmentioning

confidence: 99%

Kinetics of solid state phase transformations: Measurement and modelling of some basic issues

Raju

Mohandas

2010

J Chem Sci

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“…Equation (2) is valid for isothermal conditions. Therefore, the kinetics of the transformations under continuous cooling is modeled with the use of the additivity rule [9,13]. In this case the cooling curve is broken with respect to the temperature into successive isothermal steps with duration dt.…”

Section: Methods Of Studymentioning

confidence: 99%

Numerical Simulation of Pearlitic Transformation in Steel 45Kh5MF

2015

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A dilatometric study of steel 45Kh5MF used for making rolling mill rolls is performed. The results of the dilatometric and metallographic analyses are used to determine the kinetics of the perlitic transformation in the steel under continuous cooling. The developed method of numerical simulation of structural transformations under continuous cooling is used to solve the inverse problem and to plot a computational isothermal diagram of decomposition of supercooled austenite in steel 45Kh5MF in the range of perlitic transformation. To check the solution obtained an experimental isothermal diagram of decomposition of austenite in steel 45Kh5MF in the perlitic range is plotted. The data of both diagrams match accurately enough.

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“…[30][31][32][33][34] The principle of additivity provides a rational mathematical relationship between the transformation at constant temperatures and that which takes place under nonisothermal conditions. Isothermal kinetic data can be related to CCT behavior if the rate of transformation depends only on the state of assembly and not on the thermal path by which such state is reached.…”

Section: Nonisothermal Phase Transformationsmentioning

confidence: 99%

Prediction of Continuous Cooling Transformation Diagrams for Dual-Phase Steels from the Intercritical Region

Colla

Sanctis

Dimatteo

et al. 2011

Metall Mater Trans A

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The purpose of the present work is the implementation and validation of a model able to predict the microstructure changes and the mechanical properties in the modern high-strength dualphase steels after the continuous annealing process line (CAPL) and galvanizing (Galv) process. Experimental continuous cooling transformation (CCT) diagrams for 13 differently alloying dual-phase steels were measured by dilatometry from the intercritical range and were used to tune the parameters of the microstructural prediction module of the model. Mechanical properties and microstructural features were measured for more than 400 dual-phase steels simulating the CAPL and Galv industrial process, and the results were used to construct the mechanical model that predicts mechanical properties from microstructural features, chemistry, and process parameters. The model was validated and proved its efficiency in reproducing the transformation kinetic and mechanical properties of dual-phase steels produced by typical industrial process. Although it is limited to the dual-phase grades and chemical compositions explored, this model will constitute a useful tool for the steel industry.

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On the application of the additivity rule in pearlitic transformation in low alloy steels

Cited by 17 publications

References 27 publications

Kinetics of solid state phase transformations: Measurement and modelling of some basic issues

Kinetics of solid state phase transformations: Measurement and modelling of some basic issues

Numerical Simulation of Pearlitic Transformation in Steel 45Kh5MF

Prediction of Continuous Cooling Transformation Diagrams for Dual-Phase Steels from the Intercritical Region

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