Title: Computer aided materials design of PM duplex stainless steels

Authors: Leszek A. Dobrzanski, Zbigniew Brytan, M. Actis Grande, Mario Rosso

Addresses: Institute of Material Science and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, Gliwice 44-100, Poland. ' Institute of Material Science and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, Gliwice 44-100, Poland. ' Department of Materials Science and Chemical Engineering, Politecnico di Torino, Alessandria Campus, Viale T. Michel 5, 15100, Italy. ' Department of Materials Science and Chemical Engineering, Politecnico di Torino, Alessandria Campus, Viale T. Michel 5, 15100, Italy

Abstract: The purpose of this paper is to describe the sintered duplex stainless steels manufactured in sinter-hardening process and its use in the field of stainless steels and, moreover, to calculate the powder mix composition using computer software. In the presented paper, duplex stainless steels were obtained through powder metallurgy starting from austenitic or ferritic base powders by controlled addition of alloying elements powder. In the studies, besides the preparation of powder mixes, computer software based on Schaeffler|s diagram was studied. It has been demonstrated that austenitic-ferritic microstructures with regular arrangement of both phases and absence of precipitates can be obtained with properly designed powder mix composition and sintering cycle. Applied producing method and used sintering cycle as well as developed computer software proves advantageous in the case of obtained microstructures also working with cycles easy to be introduced in industries. [Received 15 March 2007; Accepted 10 July 2007]

Keywords: manufacturing; processing; sintering; sinter hardening; powder metallurgy; duplex stainless steel; Schaeffler diagram; computer aided materials design; duplex stainless steels; CAD; austenitic-ferritic microstructure.

DOI: 10.1504/IJCMSSE.2007.016436

International Journal of Computational Materials Science and Surface Engineering, 2007 Vol.1 No.4, pp.465 - 478

Published online: 28 Dec 2007 *

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