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Licensed Unlicensed Requires Authentication Published by De Gruyter June 11, 2013

Computational analysis of the precipitation kinetics in a complex tool steel

  • Bernhard Sonderegger , Ernst Kozeschnik , Harald Leitner , Helmut Clemens , Jiri Svoboda and Franz Dieter Fischer

Abstract

A novel steel grade has been developed recently exhibiting superior thermal stability. This is attributed to the combined precipitation of secondary hardening carbides and intermetallic phases. However, the precipitation behaviour of this steel is not completely understood yet. In this study, computer simulations of the precipitation kinetics during heat treatment of this steel are performed and compared to a complementary experimental characterisation of the precipitate microstructure, which was carried out previously. The simulations employ a novel model for nucleation, growth and coarsening of precipitates in multi-component, multi-phase systems. It is shown that the combination of experimental investigation and computer simulation provides a most comprehensive picture of the complex processes occurring in these materials during thermo-mechanical treatment, which cannot be obtained by the use of one single technique, experiment or simulation, only.


* Correspondence address, Dr. Bernhard Sonderegger, Institute for Materials Science, Welding and Forming, Graz University of Technology, Kopernikusgasse 24, A-8010 Graz, Austria, Tel.: +43 316 873 7185, Fax: +43 316 873 7187, E-mail:

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Received: 2007-10-25
Accepted: 2008-1-20
Published Online: 2013-06-11
Published in Print: 2008-04-01

© 2008, Carl Hanser Verlag, München

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