Journal ArticleDOI
Investigations of the solidification structure of continuously cast slabs
TLDR
In this article, a study of solidification phenomena performed under industrial conditions is presented, where the solidification structure of high carbon, medium carbon and micro-alloyed steel grades was observed and correlated to casting parameters such as superheat and secondary cooling.Abstract:
A study of solidification phenomena performed under industrial conditions is presented. The solidification structure of high carbon, medium carbon and microalloyed steel grades was observed and correlated to casting parameters such as superheat and secondary cooling. Experimental data of dendrite morphology are related to calculated solidification variables. The calculation is based on the solution of the enthalpy balance equation. An expression for the dependence of secondary dendrite arm spacing on solidification variables is proposed for columnar growth. The results are compared to the findings of other authors. The effect of chemical composition on secondary dendrite arm spacing was observed. Therefore the developed relationships are extended to carbon content on the basis of the presented experimental data.read more
Citations
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Journal ArticleDOI
Simple Model of Microsegregation during Solidification of Steels
Young-Mok Won,Brian G. Thomas +1 more
TL;DR: In this paper, a simple analytical model of microsegregation for the solidification of multicomponent steel alloys is presented, based on the Clyne-Kurz model and extended to take into account the effects of multiple components, a columnar dendrite microstructure, coarsening, and the δ/γ transformation.
Journal ArticleDOI
Mathematical Model for Prediction of Composition of Inclusions Formed during Solidification of Liquid Steel
TL;DR: In this article, the authors have developed a computation procedure for prediction of inclusion compositions formed during cooling and solidification of liquid steel, which has been applied to an inclusion sensitive grade of steel.
Journal ArticleDOI
Methods for Assessment of Slab Centre Segregation as a Tool to Control Slab Continuous Casting with Soft Reduction
Hubert Preßlinger,Sergiu Ilie,Peter Reisinger,Andreas Schiefermüller,Andreas Pissenberger,Erik Parteder,Christian Bernhard +6 more
TL;DR: In this article, a combination of ultrasonic porosity tests and spark analyses (OES-PDA) was used to assess the center of a slab in order to find optimum casting parameters for the subsequent melts of the same steel grade and also to use soft reduction for the purpose of minimizing macrosegregation phenomena.
Journal ArticleDOI
On the influence of carbon on secondary dendrite arm spacing in steel
Robert Pierer,Christian Bernhard +1 more
TL;DR: In this paper, the effect of carbon on the secondary dendrite arm spacing was investigated using in situ solidification experiments with accurately defined solidification conditions and compared with theoretical models from the literature.
References
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Journal ArticleDOI
Steady state columnar and equiaxed growth of dendrites and eutectic
TL;DR: In this article, an analysis for the growth of equiaxed grains ahead of the columnar front during directional solidification is presented, and the model considers both single-phase and eutectic growth.
Journal ArticleDOI
Dendrite growth at the limit of stability: tip radius and spacing
Wilfried Kurz,D.J. Fisher +1 more
TL;DR: In this article, a general framework is proposed to relate tip radius, interface undercooling and primary arm spacing in alloy dendrite growth, and all the growth morphologies developed between the limiting morphology at low and at high velocity are described to a first approximation, using an ellipsoid of revolution.
Journal ArticleDOI
Rapid dendrite growth in undercooled alloys
TL;DR: In this article, the theory of dendritic growth into undercooled alloy melts is extended to the case of large undercoolings, i.e. to high growth rates, by applying the results of the complete stability analysis of a plane interface to the tip of an Ivantsov dendrite.
Journal ArticleDOI
Dendritic growth into undercooled alloy metals
TL;DR: In this article, a growth equation for free dendrites growing in a liquid alloy was developed by coupling their diffusion fields for a parabolic tip and by applying a stability criterion.
Journal ArticleDOI
Stability effects in dendritic crystal growth
J.S. Langer,J. Müller-Krumbhaar +1 more
TL;DR: In this article, the authors proposed a stability criterion of the form ǫ 2 = constant, where ʋ is the growth velocity and ρ is the tip radius, and they showed that dendrites which are too broad and slow suffer tip splitting instabilities, whereas those which are sharp and fast tend to broaden and slow down.
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