Researcher [R26-15] High-temperature processes and microstructure control of metallic materials
Investigate high-temperature phenomena and the control of metallic microstructures in welding, casting, laser processing and additive manufacturing. This permanent research role joins the Welding and Joining Technology Group in the Research Center for Structural Materials. Work includes new materials and technologies relevant to resilience and carbon neutrality. The expected start is 1 April 2027, negotiable; applications and recommendations are due 21 October 2026.
Phase Field Modeling
Taylor Sparks and Oklahoma State University researcher Jake Bair discuss the history and methods of phase-field modelling. They explain how diffuse interfaces represent material transitions and support simulations of crack growth and dendritic structures. The episode links listeners to NIST’s Phase Field Community Hub for further technical resources.
Crystallinity characterization of white matter in the human brain
White matter microstructure underpins cognition and function in the human brain through the facilitation of neuronal communication, and the non-invasive characterization of this structure remains an elusive goal in the neuroscience community. Efforts to assess white matter microstructure are hampered by the sheer amount of information needed for characterization. Current techniques address this problem by representing white matter features with single scalars that are often not easy to interpret. Here, we address these issues by introducing tools from soft matter for the characterization of white matter microstructure. We investigate structure on a mesoscopic scale by analyzing its homogeneity and determining which regions of the brain are structurally homogeneous, or ``crystalline" in the context of materials science. We find that crystallinity is a reliable metric that varies across the brain along interpretable lines of anatomical difference. We also parcellate white matter into ``crystal grains," or contiguous sets of voxels of high structural similarity, and find overlap with other white matter parcellations. Our results provide new means of assessing white matter microstructure on multiple length scales, and open new avenues of future inquiry.