@article {2391,
	title = {Orientation-Adaptive Virtual Imaging of Defects using EBSD},
	year = {2025},
	abstract = {<p>
	EBSD is a foundational technique for characterizing crystallographic orientation, phase distribution, and lattice strain. Embedded within EBSD patterns lies latent information on dislocation structures, subtly encoded due to their deviation from perfect crystallinity - a feature often underutilized. Here, a novel framework termed orientation-adaptive virtual apertures (OAVA) is introduced. OAVAs enable the generation of virtual images tied to specific diffraction conditions, allowing the direct visualization of individual dislocations from a single EBSD map. By dynamically aligning virtual apertures in reciprocal space with the local crystallographic orientation, the method enhances contrast from defect-related strain fields, mirroring the principles of diffraction-contrast imaging in TEM, but without sample tilting. The approach capitalizes on the extensive diffraction space captured in a single high-quality EBSD scan, with its effectiveness enhanced by modern direct electron detectors that offer high-sensitivity at low accelerating voltages, reducing interaction volume and improving spatial resolution. We demonstrate that using OAVAs, identical imaging conditions can be applied across a polycrystalline field-of-view, enabling uniform contrast in differently oriented grains. Furthermore, in single-crystal GaN, threading dislocations are consistently resolved. Algorithms for the automated detection of dislocation contrast are presented, advancing defect characterization. By using OAVAs across a wide range of diffraction conditions in GaN, the visibility/invisibility of defects, owing to the anisotropy of the elastic strain field, is assessed and linked to candidate Burgers vectors. Altogether, OAVA offers a new and high-throughput pathway for orientation-specific defect characterization with the potential for automated, large-area defect analysis in single and polycrystalline materials.
</p>
},
	author = {Della Ventura, Nicol{\`o} M and Lamb, James D and Lenthe, William C and Echlin, McLean P and P{\"u}rstl, Julia T and Trageser, Emily S and Quevedo, Alejandro M and Begley, Matthew R and Pollock, Tresa M and Gianola, Daniel S and De Graef, Marc}
}
@article {lenaburg2013outcomes,
	title = {Outcomes from research collaborations: What are they and how long do they take?},
	journal = {MRS bulletin},
	volume = {38},
	number = {07},
	year = {2013},
	pages = {526{\textendash}528},
	publisher = {Cambridge Univ Press},
	author = {Lenaburg, Lubella A and Sciaky, Elizabeth S and Pollock, Tresa M}
}
@article {pollock2011oxide,
	title = {Oxide-Assisted Degradation of Ni-Base Single Crystals During Cyclic Loading: the Role of Coatings},
	journal = {Journal of the American Ceramic Society},
	volume = {94},
	number = {s1},
	year = {2011},
	publisher = {Blackwell Publishing Inc},
	author = {Pollock, Tresa M and Laux, Britta and Brundidge, Clinique L and Suzuki, Akane and He, Ming Y}
}
