Modeling of grain growth in one and two phase materials by 2D cellular automata

Christof Sommitsch, Alfred Krumphals, Mirza Candic, Baohui Tian, Martin Stockinger

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

A cellular automaton (CA) is an algorithm that describes the discrete spatial or temporal evolution of a complex system by applying local deterministic or probabilistic transformation rules to the cells of a lattice. The lattice is typical regular and its dimensions can be arbitrary. In general CA modeling utilizes a regular lattice that is divided into cells of equal size. Each cell is characterized by different states. By taking into account the states of the cells of its neighbourhood, the state of the cell can be made to change by time stepping according to the transition rules. In this work, a deterministic as well as a probabilistic CA model is presented. In the deterministic approach, the net pressure on each grain boundary is calculated taking into account grain boundary curvature, precipitations and grain boundary mobility, whereas in the probabilistic approach advanced Moore¡̄s neighbourhood configuration is considered where both the nearest and next-nearest neighbours are used. The total transition probability is calculated by a developed probabilistic rule set, where the transition probability can be increased or decreased by energy gradients and precipitations, respectively. Both virtual or real microstructures can be generated or imported into the model initially. A comparison of calculated and measured grain growth is presented for a one phase material (austenitic stainless steel 304 L) and a two phase material (Ti.6Al.4V). The input of influencing factors such as precipitates on grain growth kinetics is presented in detail.

Originalspracheenglisch
Seiten (von - bis)1515-1524
Seitenumfang10
FachzeitschriftJournal of Computational and Theoretical Nanoscience
Jahrgang9
Ausgabenummer9
DOIs
PublikationsstatusVeröffentlicht - 1 Sep 2012

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Grain Growth
cellular automata
Cellular automata
Grain growth
Cellular Automata
Grain boundaries
Grain Boundary
Cell
cells
Modeling
grain boundaries
Transition Probability
transition probabilities
Growth kinetics
Austenitic stainless steel
Large scale systems
Precipitates
Probabilistic Cellular Automata
Austenitic Stainless Steel
austenitic stainless steels

Schlagwörter

    ASJC Scopus subject areas

    • !!Chemistry(all)
    • !!Materials Science(all)
    • !!Condensed Matter Physics
    • !!Computational Mathematics
    • !!Electrical and Electronic Engineering

    Dies zitieren

    Modeling of grain growth in one and two phase materials by 2D cellular automata. / Sommitsch, Christof; Krumphals, Alfred; Candic, Mirza; Tian, Baohui; Stockinger, Martin.

    in: Journal of Computational and Theoretical Nanoscience, Jahrgang 9, Nr. 9, 01.09.2012, S. 1515-1524.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    Sommitsch, Christof ; Krumphals, Alfred ; Candic, Mirza ; Tian, Baohui ; Stockinger, Martin. / Modeling of grain growth in one and two phase materials by 2D cellular automata. in: Journal of Computational and Theoretical Nanoscience. 2012 ; Jahrgang 9, Nr. 9. S. 1515-1524.
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