| Abstract Scope |
Three-dimensional characterization of deformation in polycrystalline materials remains challenging when microstructures contain large orientation gradients, small grains, or sub-resolution deformation features. Texture tomography provides an alternative reconstruction framework for scanning 3D X-ray diffraction data by recovering an orientation distribution function (ODF) in every voxel, allowing multiple crystallographic orientations to coexist within the reconstructed volume. This capability extends diffraction-based microstructure mapping to materials where conventional grain-resolved reconstruction approaches become unreliable. The method is demonstrated on an as-built laser powder bed fused 304L TWIP steel subjected to interrupted tensile deformation. The reconstructed ODFs enable grain tracking, quantify lattice reorientation, and identify deformation twinning through the coexistence of twin-related orientations within individual voxels. The approach provides non-destructive, grain-resolved information on texture evolution in complex microstructures and offers valuable experimental input for the development and validation of crystal plasticity and microstructure evolution models. |