The data file consists of a 3-D dataset representing the microstructure and crystallographic orientations of the hcp alpha phase of a lamellar (beta annealed) Ti-6Al-4V specimen with a volume of 0.75 x 1 x 1 mm3.

The Burger's orientation relation and a flood-fill algorithm were used to reconstruct the microstructure and crystallographic orientations of the high temperature bcc beta phase.

The data has been further segmented via a 3 degree misorientation criterion and grain ids assigned to the segmented regions for both the hcp alpha phase and the bcc beta phase.

To allow the data to be easily imported into various analysis and simulation software, the data is provided in point cloud format with the points defined as the centroids of the voxels.

The methodology used to collect the data and the subsequent analysis of the data are outline in the source publication:

Wielewski, E., Menasche, D. B., Callahan, P. G. & Suter, R. M. Three-dimensional alpha colony characterization and prior-beta grain reconstruction of a lamellar Ti--6Al--4V specimen using near-field high-energy X-ray diffraction microscopy. J. Appl. Crystallogr. 48, 1165–1171 (2015).

http://dx.doi.org/10.1107/S1600576715011139

Please reference both the data and the source publication.

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The data is tab delimited and has the following format:

x   y   z   alpha_grain_id   beta_grain_id   alpha_ort_1   alpha_ort_2   alpha_ort_3   alpha_avg_1   alpha_avg_2   alpha_avg_3   beta_avg_1   beta_avg_2   beta_avg_3

where:

x, y, z = coordinates of the voxel centroids, in mm
alpha_grain_id = the assigned alpha colony id, segmented with a 3 degree misorientation criterion
beta_grain_id = the assigned beta grain id, segmented with a 3 degree misorientation criterion
alpha_ort_1,2,3 = raw orientations for the alpha phase, Bunge-Euler in degrees
alpha_avg_1,2,3 = alpha colony averaged orientations, Bunge-Euler in degrees
beta_avg_1,2,3 = beta grain averaged orientations, Bunge-Euler in degrees