ThermoCalc Application for the Assessment of Binary Alloys Non-Equilibrium Solidification

• Autorzy: Zyska A. , Konopka Z. , Łągiewka M. , Kordas P.

Identyfikatory

DOI

10.1515/afe-2017-0030

• Języki publikacji: EN

Abstrakty

EN

The paper presents the possibility of application of the developed computer script which allows the assessment of non-equilibrium solidification of binary alloys in the ThermoCalc program. The script makes use of databases and calculation procedures of the POLY-3 module. A solidification model including diffusion in the solid state, developed by Wołczyński, is used to describe the non-equilibrium solidification. The model takes into account the influence of the degree of solute segregation on the solidification process by applying the so-called back-diffusion parameter. The core of the script is the iteration procedure with implemented model equation. The possibility of application of the presented calculation method is illustrated on the example of the Cr-30% Ni alloy. Computer simulations carried out with use of the developed script allow to determine the influence of the back-diffusion parameter on the course of solidification curves, solidus temperature, phase composition of the alloy and the fraction of each phase after the solidification completion, the profile of solute concentration in liquid during solidification process, the average solute concentration in solid phase at the eutectic temperature and many other quantities which are usually calculated in the ThermoCalc program.

Słowa kluczowe

EN

Thermo-Calc; non-equilibrium solidification; segregation; Wołczyński model; binary alloys

PL

program TermoCalc; krzepnięcie nierównowagowe; model Wołczyńskiego; segregacja; stopy binarne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 1
• Strony: 163--168
• Opis fizyczny: Bibliogr. 20 poz., rys., wykr., wzory

Twórcy

autor

Zyska A.

• Foundry Department, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa

autor

Konopka Z.

• Foundry Department, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa

autor

Łągiewka M.

• Foundry Department, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa

autor

Kordas P.

• Foundry Department, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa

Bibliografia

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• [4] Ansara, I. (2000). Models for composition dependence. Calphad. 24, 19-40.
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• [7] Hillert, M. (1998). Phase Equilibria, Phase Diagrams and Phase Transformations – Their Thermodynamic Basis. Cambridge University Press.
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• [15] Kobayashi, S. (1988). Solute Redistribution during Solidification with Diffusion in Solid Phase. A theoretical analysis. Journal of Crystal Growth. 88, 87-96.
• [16] Nastac, L. & Stefanescu, D. (1993). An analytical model for solute redistribution during solidification of planar, columnar, or equiaxed morphology. Metallurgical Transactions A. 24A, 2107-2118.
• [17] Brody, H.B. & Flemings, M.C. (1966). Solute redistribution in dendritic solidification. Transactions of the Metallurgical Society of AIME. 236, 615- 624.
• [18] Wołczyński, W. (2000). Back-diffusion phenomenon during the crystal growth by the Bridgman method. Modeling of Transport Phenomena in Crystal Growth. Boston: WIT Press. 19-59.
• [19] Kloch, J., Billia, B., Okane, T., Umeda, T. & Wołczyński, W. (2000). Experimental Verification of the Solute Redistribution in Cellular/Dendritic Solidification of the Al-3.5Li and Fe-4.34Ni Alloys. Materials Science Forum. 329-330, 31-36.
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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).