b'reactors should be decommissioned and improve understanding of the mechanical performance of next-generation materials.Accomplishments: The research team achieved multiple accomplishments during the project execution. First, a vari-able-length virtual extensometer technique was developed to obtain thousands of ductility measure- Figure 1. a) A multi-length scale comparison of the mechanical behavior of ments from a single tensionZircaloy-2 using different specimen geometric ratios, b) representative data captured during each experiment including electron back scatter diffraction experiment (Ryan Berke, Utahinverse pole figure orientation mapping and full field deformation fields as a State University). The advance- function of strainment in data analysis allows for just a handful of experiments to be conducted when quantifying mate-rial ductility, thereby significantly improving throughput. Further-more, the technique is length scale agnostic and can be applied to microscale and macroscale full-field displacement data. From the ductility data point cloud obtained using the variable extensometer technique, a unifying ductilitylaw was proposed that mergesBarbas Law and the Bertella- Oliver equation.Advances were also made to the gridFigure 2. Comparison between an experimental oxygen-free high thermal method (GM) full-field deformation conductivity (OFHC) copper tensile test and simulations with semi-synthetic technique, enabling it to be imple- microstructures (i.e., surface microstructure that directly matches the OIM map from the experimental test coupon but with variable subsurface microstructures). a) Axial strain field of the experimental coupon collected at final fracture using digital image correlation. b,c) Axial strain fields at final fracture from two of the 15 simulations representing the two predicted fracture locations. d) Macroscopic stress-strain responses from the experiment and 15 simulations; simulations are color-coded based on the two predicted fracture locations, and the color-filled regions correspond to the full range of simulated responses for a given predicted fracture location. In a)-c), visible surface crystallographic orientation maps are identical2022|AFC ACCOMPLISHMENTS 49'