Journal of Applied Crystallography

Volume 35, Part 4 (August 2002)

research papers

J. Appl. Cryst. (2002). 35, 401-405 [ doi:10.1107/S0021889802005824 ]

The calculation of a parent grain orientation from inherited variants for approximate (b.c.c.-h.c.p.) orientation relations

M. Humbert and N. Gey

Abstract: The orientations of parent [beta] grains are evaluated from several [alpha] variants inherited from the same parent during the body-centred cubic (b.c.c.) to hexagonal close packed (h.c.p.) phase transformation. The proposed calculation, based on orientation correlating and orientation averaging, is particularly useful when the inherited variants are not strictly related to the parent orientation by a strict Burgers orientation relation or when the orientations of the inherited volumes vary slightly at different locations of the variant. This method of parent identification from variant orientations is an improvement of a previously published method.

Keywords: phase transformations; orientation relations; texture.