Modelling of microstructure evolution in hot work tool steels during service

Friedrich Krumphals¹, Thomas Wlanis¹, Christof Sommitsch¹, Ivan Holzer², Bernhard Sonderegger², Volker Wieser³

¹Christian Doppler Laboratory for Materials Modelling and Simulation, Chair of Metal Forming, University of Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria.
²Institute for Materials Science and Welding, University of Technology, Kopernikusgasse 24, 8010 Graz, Austria.
³Böhler Edelstahl GmbH & Co KG, Mariazellerstrasse 25, 8605 Kapfenberg, Austria.

DOI:

https://doi.org/10.7494/cmms.2009.2.0235

Abstract:

To establish a reliable lifetime prediction of hot work tool steels during service, it is necessary to characterize the initial microstructure as well as its evolution during application since the material properties depend on the microstructural configuration. The microstructure evolution during heat treatment is simulated with the software MatCalc, where the precipitation kinetics is of particular interest. The investigated X38CrMoV5-1 hot work tool steel, which has a bcc lattice structure, forms a distinct dislocation cell and subgrain structure, respectively, which is described by a dislocation density model for thermal creep using the rate theory with particular consideration of the subgrain boundary behaviour. The precipitation calculations with MatCalc are compared with microstructural investigations.

Cite as:

Krumphals, F., Wlanis, T., Sommitsch, C., Holzer, I., Sonderegger, B., & Wieser, V. (2009). Modelling of microstructure evolution in hot work tool steels during service. Computer Methods in Materials Science, 9(2), 228 – 233. https://doi.org/10.7494/cmms.2009.2.0235

Article (PDF):

Keywords:

Hot work tool steels, Extrusion, Microstructure modelling, Dislocation density evolution

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