Computation of Partial Equilibrium Solidification with Complete Interstitial and Negligible Substitutional Solute Back Diffusion

Chen, Qing; Sundman, Bo

doi:10.2320/matertrans.43.551

Cited by 99 publications

(65 citation statements)

References 13 publications

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“…The interfacial concentrations are infinite when the solid fraction approaches one, which also limits the application of the Scheil Model, because the final concentrations and solidus temperature are important expectations. To overcome the aforementioned limitations, an improved Scheil Model that considered the back diffusion was proposed [22], which is also termed as the partial equilibrium method [23]. In the partial equilibrium method, the perfect diffusion of interstitial solutes and no diffusion of substitutional solutes in solid steel are accounted.…”

Section: Scheil Modelmentioning

confidence: 99%

Modeling Inclusion Formation during Solidification of Steel: A Review

You

Michelic

Presoly

et al. 2017

Metals

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Abstract:The formation of nonmetallic inclusions in the solidification process can essentially influence the properties of steels. Computational simulation provides an effective and valuable method to study the process due to the difficulty of online investigation. This paper reviews the modeling work of inclusion formation during the solidification of steel. Microsegregation and inclusion formation thermodynamics and kinetics are first introduced, which are the fundamentals to simulate the phenomenon in the solidification process. Next, the thermodynamic and kinetic models coupled with microsegregation dedicated to inclusion formation are briefly described and summarized before the development and future expectations are discussed.

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Section: Scheil Modelmentioning

confidence: 99%

Modeling Inclusion Formation during Solidification of Steel: A Review

You

Michelic

Presoly

et al. 2017

Metals

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“…Ueshima et al 150) predicted the start of the peritectic using empirical relationships based on local solid concentrations, whilst Howe et al 151,152) introduced 'carbon equivalents' for alloying elements such that the effect of each partitioned species on the peritectic temperature was accounted for in a pseudo-binary model. More recently the use of thermodynamic databases in steel microsegregation models has become popular [153][154][155][156] and kinetic effects have also been incorporated into models .111,157-163) Nevertheless, adding such complexity into macrosegregation models often comes at great computational expense, and consequently there has been some development of rapid microsegregation models for incorporation into macromodels. 164) For those seeking further details on microsegregation models, the review by Kraft and Chang 165) is a useful starting point.…”

Section: Microsegregation Modelsmentioning

confidence: 99%

Macrosegregation in Steel Ingots: The Applicability of Modelling and Characterisation Techniques

Pickering

2013

ISIJ Int.

146

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The macro-scale segregation of alloying elements during the casting continues to afflict the manufacturers of steel ingots, despite many decades of research into its prediction and elimination. Defects such as A-segregates are still commonplace, and components are regularly scrapped due to their presence, leading to increased economic and environmental costs. With the growth of the nuclear power industry, and the increased demands placed on new pressure vessels, it is now more important than ever that today's steel ingots are as chemically homogeneous as possible.This article briefly reviews the development of our current understanding of macrosegregation phenomena during the 20 th century, before going on to assess the latest developments in the field of macrosegregation modelling. The aim of the text is to highlight the shortcomings of applying contemporary macromodels to steel-ingot casting, and to suggest practical alternatives. In addition, the experimental characterisation of macrosegregation is explored, and a review of the various techniques currently available is presented.

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“…complete interstitial but negligible substututional solute back difuusion in the solid. This is realized in the PE model 66,67) through evening up the chemical potential of the interstitials throughout the solid. In above software packages, the prediction of the solidification path for various alloys is available through coupling with these three models and thermodynamic and kinetic database.…”

Section: )mentioning

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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Computation of Partial Equilibrium Solidification with Complete Interstitial and Negligible Substitutional Solute Back Diffusion

Cited by 99 publications

References 13 publications

Modeling Inclusion Formation during Solidification of Steel: A Review

Modeling Inclusion Formation during Solidification of Steel: A Review

Macrosegregation in Steel Ingots: The Applicability of Modelling and Characterisation Techniques

Methodological Progress for Computer Simulation of Solidification and Casting

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