J. Phys. IV France
Volume 112, October 2003
Page(s) 309 - 312

J. Phys. IV France
112 (2003) 309
DOI: 10.1051/jp4:2003890

Microtextural study of variant selection by EBSD in a bainitic steel containing retained austenite

S. Godet1, B.-K. Kim1, P.J. Jacques1, J. Szpunar2, J.J. Jonas2 and F. Delannay1

1  Université Catholique de Louvain, PCIM, 2 place Sainte Barbe, 1348 Louvain-la-Neuve, Belgium
2  McGill University, Department of Metallurgical Engineering, 3610 University Street, Montréal, Québec H3A 2B2, Canada

The phenomenon of variant selection in a bainitic steel containing retained austenite was investigated. The steel was hot-rolled below the Tnr to true strains of $\varepsilon = 0.2$ and $\varepsilon =0.8$ in the austenite temperature range. The orientation relationships between bainite and austenite are expressed in Rodrigues space. A strain of 0.2 is shown to be insufficient to induce variant selection. A hot deformation or 0.8 leads to a much smaller number of variants being created, which are shown to be related to the slip systems active during austenite deformation.

© EDP Sciences 2003