Selection of the appropriate phase transformation model for design of laminar cooling and continuous annealing of DP steels

• Autorzy: Szeliga D.

Warianty tytułu

PL

Dobór modelu przemian fazowych dla procesu laminarnego chłodzenia i wyżarzania stali dwufazowych

• Języki publikacji: EN

Abstrakty

EN

In the work modified JMAK phase transformation model dedicated to dual phase steels was proposed. The model was validated with sensitivity analysis methods and the most important model parameters were selected. The sensitivity analysis results were next used in the parameters identification task. That task was formulated as an inverse problem, it was transformed to the optimization task. The minimum of the goal function defined in the optimization problem was the solution of the model parameters identification. The phase transformation model outputs with identified parameters were compared to measurements from dilatometer and microsections analysis. The comparison was satisfied. Two different case studies were defined to apply modified JMAK model to finite element software and to performed simulations of selected case studies. Investigated procedure proved the fitness for modelling of complex industrial processes combining material forming and cooling/annealing.

PL

W pracy przedstawiono zmodyfikowany model przemian fazowych oparty na równaniu JMAK, umożliwiający modelowanie procesu laminarnego chłodzenia i wyżarzania stali dwufazowych. Dla modelu przemian wyznaczono jego najistotniejsze parametry korzystając z metod analizy wrażliwości. Następnie wyznaczono parametry modelu przemian dla stali dwufazowej. Zagadnienie identyfikacji parametrów modelu zdefiniowano jako zadanie odwrotne korzystając z wcześniejszych wyników analizy wrażliwości. Ilościowe oszacowanie parametrów zostało zweryfikowane na podstawie pomiarów dylatometrycznych oraz analizy obrazów mikrostruktury. W drugiej części pracy zaprezentowano obliczenia dla dwóch różnych procesów przemysłowych z wykorzystaniem modelu przemian fazowych połączonym z metodą elementów skończonych. Otrzymane wyniki potwierdziły przydatność opracowanych modeli do modelowania złożonych procesów przemysłowych łączących formowanie materiału z procesem chłodzenia bądź wyżarzania.

Słowa kluczowe

EN

phase transformation model; sensitivity analysis; parameters identification; laminar cooling and annealing modeling

• Wydawca: Wydawnictwa AGH
• Czasopismo: Computer Methods in Materials Science
• Rocznik: 2012
• Tom: Vol. 12, No. 2
• Strony: 70--84
• Opis fizyczny: Bibliogr. 34 poz., rys.

Twórcy

autor

Szeliga D.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland,

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