  Materials with an allotropic phase transformation can result in the formation
of microstructures where grains have orientation relationships (ORs) determined
by the transformation history. These microstructures influence the final
material properties. In zirconium alloys, there is a solid-state body centred
cubic (BCC) to hexagonal close packed (HCP) phase transformation, where the
crystal orientations of the HCP phase can be related to the parent BCC
structure via the Burgers orientation relationship (BOR). In the present work,
we adapt a reconstruction code developed for steels which uses a Markov Chain
clustering algorithm to analyse electron backscatter diffraction (EBSD) maps
and apply this to the HCP and BCC BOR. Once the parent microstructure is
reconstructed from EBSD data, it is possible to analyse the variants of the HCP
phase that are present and understand shared crystal planes and shared lattice
directions within each prior beta grain with a view to understanding the
transformation related deformation properties of the final microstructure. This
analysis can be used to understand how the microstructure evolves and
properties such as the effective slip length for plastic deformation.
