  Three-dimensional X-ray diffraction (3DXRD) is shown to be feasible at the
I12 Joint Engineering, Environmental and Processing (JEEP) beamline of Diamond
Light Source. As a demonstration, a microstructually simple low-carbon ferritic
steel was studied in a highly textured and annealed state. A processing
pipeline suited to this beamline was created, using software already
established in the 3DXRD user community, enabling grain centre-of-mass
positions, orientations and strain tensor elements to be determined.
Orientations, with texture measurements independently validated from electron
backscatter diffraction (EBSD) data, possessed a $\sim 0.1^\circ$ uncertainty,
comparable with other 3DXRD instruments. The spatial resolution was limited by
the far-field detector pixel size; the average of the grain centre of mass
position errors was determined as $\pm \sim 80 \mu$m. An average per-grain
error of $\sim 1 \times 10^{-3}$ for the elastic strains was also measured;
this could be reduced in future experiments by improving sample preparation,
data collection and analysis techniques. Application of 3DXRD onto I12 shows
great potential, where its implementation is highly desirable due the flexible,
open architecture of the beamline. User-owned or designed sample environments
can be used, thus 3DXRD could be applied to previously unexplored scientific
areas.
