Numerical Modeling of Microsegregation for Fe-base Multicomponent Alloys with Peritectic Transformation Coupled with Thermodynamic Calculations

Natsume, Yukinobu; Shimamoto, Masaki; Ishida, Hideyuki

doi:10.2355/isijinternational.50.1867

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…Cicutti and Boeri8 developed a micro‐segregation model with a special consideration of the dendrite coarsening and the precipitation behavior of MnS and took the steel system as a dilute solution according to Kobayashi 9. However, Natsume et al10 recently supposed the dendrite cross section as a star shape and coupled the micro‐segregation model with thermodynamic calculation software to monitor the transformation conditions at the interface between phases. Among those models, the Ueshima model5 was widely used to investigate the thermal and mechanical properties of steel within the high temperature range 1–4, 11–13…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, there is much difficulty in properly determining the cooling rate which controls the dendrite arming space and grain structure28 and affects the characteristic temperature of continuous casting steel 1, 6. Most of micro‐segregation models described above chose the cooling rate from experience6, 12–14 and experimental conditions,1–5, 7–10 without corresponding to heat transfer process of the practical continuous casting process. Generally, the micro‐segregation in the mushy zone is mainly concerned, since cracks generally originate from such temperature range.…”

Section: Introductionmentioning

confidence: 99%

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Micro‐Segregation Behavior of Solute Elements in the Mushy Zone of Continuous Casting Wide‐Thick Slab

Wang¹,

Zhu²,

Cai³

et al. 2012

steel research int.

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Based on the assumption that the transverse cross‐section of dendrites is a regular hexagon, a coupled macro‐heat transfer and solute diffusion model was developed to describe micro‐segregation behavior of solute elements in the mushy zone during wide‐thick slab continuous casting. The heat transfer model and the micro‐segregation model were validated by the industrial tests and the experiment measurements in literatures, respectively. The results show that the cooling rate decreases from 51.1°C s−1 at the surface to 0.13°C s−1 at the center of the wide‐thick slab of peritectic steel continuous casting. The effective cooling rate equaling to 1.78°C s−1 mainly depends on mold cooling and varies little with casting speed. The micro‐segregation behavior of solute elements in the mushy zone depends on back diffusion ability and local equilibrium at interfaces. Compared with other elements in the steel, phosphorus, and sulfur elements exhibit a much higher segregation ratio at the end of the solidification and are more significantly affected by the initial carbon content.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Micro‐Segregation Behavior of Solute Elements in the Mushy Zone of Continuous Casting Wide‐Thick Slab

Wang¹,

Zhu²,

Cai³

et al. 2012

steel research int.

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“…A two-dimensional cellular automaton model that was coupled with phase diagram information was proposed for the simulation of microstructure and microsegregation of multicomponent alloys. Other examples of work on the simulation of multicomponent alloys is by Michelic et al [298] using a modified virtual front tracking model for industrially interesting steels, and by Natsume et al [299] who computed microsegregation and peritectic transformation for Fe-C-Mn-Si-P-Mo alloy.…”

Section: Segregation and Last Stage Solidificationmentioning

confidence: 99%

Progress in modelling solidification microstructures in metals and alloys. Part II: dendrites from 2001 to 2018

Kurz

Rappaz

Trivedi

2020

International Materials Reviews

131

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This is the first account of the history of modelling dendritic and cellular solidification. While Part I reviewed the progress up to the year 2000 [Kurz W, Fisher DJ, Trivedi R. Progress in modelling solidification microstructures in metals and alloys: dendrites from 1700 to 2000. Intern Mater Rev. 201964:311-354], Part II retraces our modelling capabilities developed during the early years of the present century. Advances in in-situ X-ray observations of solidification of metallic alloys are also presented. While the most important contributions are mentioned, the authors are aware that such a historical review must leave many worthy articles by the wayside. This overview considers dendrite tip growth and morphology, rapid solidification, melt flow, fragmentation, columnar-to-equiaxed transition, dendrite spacings, coalescence, grain competition, and cellular growth. Modelling across the length scales from nano-up to macroscopic solidification phenomena by massive phase field computations or multiscale approaches show the potential for the simulation of real processes such as additive manufacturing, single crystal casting, welding or advanced solidification processes.

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“…Meanwhile, the combination of a microsegregation model with the macroscopic heat and solute transport equations is an efficient way for prediction of both the solidification path and the solidification grain structure. From another point of view, for simulations of actual castings, 54) Kobayashi's model [70][71][72][73] and Natsume's model, 84) based on a one-dimensional case, should presently be recommended.…”

Section: Discussionmentioning

confidence: 99%

“…In this stand point, many other micro segregation models were proposed. [74][75][76][77][78][79][80][81][82][83][84] A summary of major assumptions used in these micosegregation models is given in Table 2.…”

Section: Other Microsegregation Modelsmentioning

confidence: 99%

Methodological Progress for Computer Simulation of Solidification and Casting

Nakajima

Zhang²,

Oikawa

et al. 2010

ISIJ Int.

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The dramatic progress made over the last 10 to 15 years in the field of "computer simulation of solidification and casting" is greatly due to the supports by academic as well as industrial research. The driving force behind this undertaking was the promise of predictive capabilities that will allow process and material developments. Here, the recent works on modeling were summarized, for the macrosegregation in the macroscale simulation, and the Cellular Automaton, the solidification path combined with the microsegregation, the phase-field model in the meso-scale and micro-scale simulation.

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Numerical Modeling of Microsegregation for Fe-base Multicomponent Alloys with Peritectic Transformation Coupled with Thermodynamic Calculations

Cited by 10 publications

References 21 publications

Micro‐Segregation Behavior of Solute Elements in the Mushy Zone of Continuous Casting Wide‐Thick Slab

Micro‐Segregation Behavior of Solute Elements in the Mushy Zone of Continuous Casting Wide‐Thick Slab

Progress in modelling solidification microstructures in metals and alloys. Part II: dendrites from 2001 to 2018

Methodological Progress for Computer Simulation of Solidification and Casting

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