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      Simulation of the Austenitization of Ferrite-Carbide Microstructures by means of the Cellular-Automaton Method (CA)∗ Translated title: Simulation der Austenitisierung von Ferrit/Karbid-Gefügen mithilfe eines zellulären Automaten

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          Abstract

          To achieve maximum hardness and to avoid retained austenite during surface hardening processes, homogeneous austenitization is desired. The necessary temperature to achieve this depends on the heating conditions and the initial microstructure. Its measurement is generally tedious and no distinct models are available to model the process.

          Therefore, a simulation model of the austenitization process based on a 2-D cellular automaton was developed and analyzed. The model predicts the austenitization kinetics as well as the homogenization temperature for a given microstructure and heating process. The model is able to predict the characteristic dependencies that are known from the experiments at least in a qualitative way.

          Kurzfassung

          Um im Zuge der Oberflächenhärtung maximale Härtegrade bei gleichzeitiger Vermeidung von Restaustenit zu erzielen, ist ein homogenes Austenitisieren anzustreben. Die hierfür erforderliche Temperatur hängt von den Erwärmungsbedingungen und der anfänglichen Gefügestruktur ab. Deren Messung gestaltet sich allgemein schwierig, zudem stehen keine speziellen Systeme zur Modellierung des Prozesses zur Verfügung. Aus diesem Grund wurde ein Simulationsmodell des Austenitisierprozesses basierend auf einem 2-D-Zellularautomaten entwickelt und analysiert. Anhand des Modells kann sowohl die Austenitisierkinetik als auch die Homogenisierungstemperatur für einen gegebenen Gefügezustand und Erwärmungsprozess prognostiziert werden. Das Modell ist in der Lage, die aus den experimentellen Untersuchungen bekannten charakteristischen Abhängigkeiten zumindest auf qualitativer Ebene abzuschätzen.

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          Most cited references 11

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          Uncertainties in dilatometric determination of martensite start temperature

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            Prediction of phase transformations during laser surface hardening of AISI 4140 including the effects of inhomogeneous austenite formation

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              Influence of cyclic temperature changes on the microstructure of AISI 4140 after laser surface hardening

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                Author and article information

                Journal
                htme
                HTM Journal of Heat Treatment and Materials
                Carl Hanser Verlag
                1867-2493
                2194-1831
                14 August 2019
                : 74
                : 4
                : 228-237
                Affiliations
                1 Karlsruhe Institute of Technology – Institute for Applied Materials, Germany
                2 Arts et Métiers ParisTech, Cluny, France
                3 Karlsruhe Institute of Technology – Institute for Applied Materials, Germany
                Author notes
                [∗]

                Lecture presented at the QDE2018, International Conference on Quenching and Distortion Engineering, Nov. 27–29, 2018, Nagoya, Japan

                4 daniel.kaiser@ 123456kit.edu (Corresponding author/Kontakt)
                Article
                HT110384
                10.3139/105.110384
                © 2019, Carl Hanser Verlag, München
                Page count
                References: 15, Pages: 10
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/htme
                Categories
                Scientific Contributions/Fachbeiträge

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