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

S. Godet; B.-K. Kim; P.J. Jacques; J. Szpunar; J.J. Jonas; F. Delannay

doi:doi:10.1051/jp4:2003890

Issue		J. Phys. IV France Volume 112, October 2003


Page(s)		309 - 312
DOI		https://doi.org/10.1051/jp4:2003890

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

Abstract
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.