  Here we analyze a three-dimensional distribution of crystallographic slip
measured in-situ during the uniaxial deformation of hexagonal Ti-7Al. The slip
field is reconstructed using a novel methodology that combines spatially
resolved lattice orientation fields and grain-averaged stresses measured using
high-energy X-ray diffraction microscopy (HEDM) with crystal plasticity.
Analysis is performed to explore lattice orientation dependence, stress
dependence, and connectivity (network relationships) of grains experiencing
elevated amounts of slip. Elevated slip is found to be primarily associated
with a single large network of connected grains, and within this network, a
clustered group of grains oriented favorably for slip are found to have
outsized structural importance. The effect of different rate sensitivities of
families of slip systems on reconstructed slip activity is also discussed.
