Počet záznamů: 1
Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries
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SYSNO ASEP 0352138 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Mean-field model for the growth and coarsening of stoichiometric precipitates at grain boundaries Tvůrce(i) Kozeschnik, E. (AT)
Svoboda, Jiří (UFM-A) RID, ORCID
Radis, R. (AT)
Fischer, F. D. (AT)Celkový počet autorů 4 Zdroj.dok. Modelling and Simulation in Materials Science and Engineering. - : Institute of Physics Publishing - ISSN 0965-0393
Roč. 18, č. 1 (2010), Art. No. 015011Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova precipitation ; growth ; grain boundary Vědní obor RIV BJ - Termodynamika CEP OC10029 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000272791800011 DOI 10.1088/0965-0393/18/1/015011 Anotace In this paper, a model for growth and coarsening of precipitates at grain boundaries is developed. The concept takes into account that the evolution of grain boundary precipitates involves fast short-circuit diffusion along grain boundaries as well as slow bulk diffusion of atoms from the grain interior to the grain boundaries. The mathematical formalism is based on a meanfield approximation, utilizing the thermodynamic extremal principle. The model is applied to the precipitation of aluminum nitrides in microalloyed steel in austenite, where precipitation occurs predominately at the austenite grain boundaries. It is shown that the kinetics of precipitation predicted by the proposed model differs significantly from that calculated for randomly distributed precipitates with spherical diffusion fields. Good agreement of the numerical solution is found with experimental observations as well as theoretical treatment of precipitate coarsening. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2011
Počet záznamů: 1