diplomsko delo
Žiga Bertalanič (Author), Goran Kugler (Mentor)

Abstract

To delo predstavlja študijo razvoja mikrostrukture med normalno rastjo zrn v prisotnosti disperzoidov na mezoskopski prostorski skali. Na osnovi kinetične Mote Carlo metode, ki temelji na Pottsovem modelu, je bilo razvito računalniško orodje, ki omogoča simulacije razvoja mikrostrukture v 2D. Disperzoidi so obravnavani kot inertne statične faze, ki so naključno porazdeljene po celotni simulacijski površini. Simulacije so bile izvedene za disperzoide s tremi različnimi morfologijami in primerjane med seboj ter z rezultati simulacij normalne rasti zrn brez dodanih delcev drugih faz. Opazen je močan vpliv pripenjanja dispersoidov na premikajoče se meje kristalnih zrn, kar vpliva na kinetiko razvoja mikrostruktur. Na osnovi rezultatov računalniških simulacij je bilo ugotovljeno, da se z naraščanjem koncentracije disperzoidov zmanjšujeta tako končna povprečna velikost zrn kot tudi čas, potreben za začetek pripenjanja mikrostrukture, kar se ujema z rezultati poskusov in simulacij iz znanstvene literature.

Keywords

Monte Carlo simulacije;Pottsov model;razvoj mikrostrukture;rast zrn;delci drugih faz;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL NTF - Faculty of Natural Sciences and Engineering
Publisher: [Ž. Bertalanič]
UDC: 669
COBISS: 83708675 Link will open in a new window
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Other data

Secondary language: English
Secondary title: simulation of the influence of dispersoids on normal grain growth using Potts Monte Carlo method
Secondary abstract: This work provides a mesoscopic study of the evolution of microstructure during normal grain growth in the presence of particle dispersion. A Monte Carlo computer simulation technique based on the Potts model has been developed which allows the evolution of microstructure as a function of time to be followed in 2D. Dispersoids were modeled as inert and static phases randomly distributed over the simulation surface. Three different morphologies of dispersoids were considered and the results of the simulations were compared with the results of simulations of grain growth in the absence of particles. A strong pinning effect of dispersoids on moving grain bundles was observed. It was found that as the particle concentration increases, both the final average grain sizes and the time required for start pinning the microstructure decrease, which is consistent with the results of experiments and simulations from the literature.
Secondary keywords: Monte Carlo simulation;Potts model;microstructure evolution;grain growth;second phase particles.;
Type (COBISS): High school thesis
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Naravoslovnotehniška fak., Oddelek za materiale in metalurgijo
Pages: XI, 52 f.
ID: 13571116