J. Phys. IV France 110 (2003) 189
DOI: 10.1051/jp4:20020692

Stress-deformation behaviour of high manganese (AI, Si) TRIP and TWIP steels

L. Krüger¹, L. W. Meyer², U. Brûx³, G. Frommeyer³ and O. Grässel<sup>4

1</sup>  NORDMETALL GbR, Einsiedlerstr. 18h, 09235 Burkhardtsdorf, Germany
²  TU Chemnitz, Lehrstuhl Werkstoffe des Maschinenbaus, 09107 Chemnitz, Germany
³  Max-Planck-institut für Eisenforschung GmbH, Department of Materials Technology, Max Planck Str. 1, 40237 Düsseldorf, Germany
⁴  Pierburg AG, P-EZP, Alfred-Pierburg-Strasse 1, 41456 Neuss, Germany

Abstract
Microstructure and mechanical properties of high manganese (Al, Si) TRIP (transformation induced plasticity) and TWIP (twinning induced plasticity) steels were investigated at quasistatic and dynamic tensile loading in a wide range of temperature. The mechanical properties are strongly dependent on the stacking fault energy and are influenced by chemical composition, temperature and loading rates. A gradual formation of deformation twins and/or martensitic phase transformation are essential to achieve excellent formability at high strength levels.

© EDP Sciences 2003