4th International Congress on 3D Materials Science (3DMS) 2018: Measuring and Predicting Grain Shapes, Sizes, Crystallography, and Spatial Distributions I
Program Organizers: Hugh Simons, Denmark Technical University; Henning Poulsen, Denmark Technical University; David Rowenhorst, Naval Research Laboratory; Peter Voorhees, Northwestern University; Satoshi Hata, Kyushu Univ; McLean Echlin, UC Santa Barbara

Wednesday 8:00 AM
June 13, 2018
Room: Lille Scene
Location: Kulturværftet (Culture Yard) Conference Center

8:00 AM  Invited
Multiscale Multimodal Correlative 3D Imaging of Biomaterials: David McComb1; Isabel Boona1; Shaz Khan2; Jonathan Earl2; 1The Ohio State University; 2GlaxoSmithKline Consumer Healthcare R&D
    Many materials challenges require an understanding on multiple length scales and often visualization in three dimensions (3D) is essential. For example, composites found in lithium ion batteries, catalytic systems and even mineralized tissue are comprised of organic and inorganic phases with many channels, pores, and features that span length scales from centimeters to nanometers. Fully characterizing these complex structures requires the use of correlative microscopy applied to a sufficiently broad range of techniques that can span the full range of length scales involved. In this contribution we will discuss development of a multiscale multimodal correlative workflow that combines X-ray microtomography (XMT) with FIB-SEM and scanning transmission electron microscopy (STEM). The workflow process developed allows us to take correlate information from the atomic scale to the macroscopic scale on the same specimen. Our goal is to understand the 3-D structure of human dentin and the relationship between the structure and properties.

8:30 AM  
Twin Related Domain Structure in a Polycrystalline Nickel-base Superalloy: William Lenthe1; Jean-Charles Stinville2; McLean Echlin2; Toby Francis1; Tresa Pollock2; 1Carnegie Mellon University; 2University of California, Santa Barbara
    Fatigue is the life limiting property for the polycrystalline nickel based superalloys. René 88DT exhibits a high density of annealing twin boundaries and favorably oriented twin boundaries in large grains serve as fatigue crack initiation sites. Although the importance of twin boundaries has been established, their 3D structure and connectivity is poorly understood. Multiple 3D volumes of René 88DT have been collected via femtosecond laser serial section using the TriBeam system. New metrics to quantify twin related domain structure have been developed and applied to hundreds of fully captured domains with implication for fatigue lifetime examined.

8:50 AM  
A Full 3D Description of the Structural Formation of the Prismatic Tissue in Marine Shells Using Classical Laws from Materials Science: Dana Zoellner1; Igor Zlotnikov1; 1TU Dresden
     Polycrystalline networks forming the microstructures of many materials have an immense impact on materials behavior. Hence, many attempts have been made to understand and consequentially predict microstructures and their changes during grain growth analytically. A special case that has been drawing much attention is ideal grain growth, where all grain boundaries are characterized by the same properties, for which over the years many analytic laws have been derived in two and three dimensions.In the present work, we show that the formation of the prismatic layer in marine shells like Atrina vexillum can be described fully by classical analytical approaches from various physical theories. In particular, we quantitatively analyze the three-dimensional structure of the prismatic assembly in Atrina vexillum and show that while the average grain size follows a square-root law, the polycrystalline microstructure is in a self-similar state fulfilling consistently among others the well-known von Neumann-Mullins law.

9:10 AM  
4D Imaging of Silicon-Molybdenum Alloyed Ductile Cast Iron Including Results from DVC Analysis: Torsten Sjögren1; Stephen Hall2; Erik Dartfeldt1; Peter Skoglund3; Lennart Elmquist4; Jessica Elfsberg3; Marta Majkut5; 1RISE Research Institutes of Sweden; 2Lund University; 3Scania CV AB; 4Swerea SWECAST; 5European Synchrotron Radiation Facility
    Ductile Cast Iron (DCI) materials are used in the heavy truck industry where increasing environmental requirements inevitably lead to increased combustion pressure and temperature that, in turn, entail more severe loading of the structural materials. In-situ tensile loading of DCI samples has been carried out at ID11 of ESRF with 4D x-ray tomography and 3D-XRD. The tomographic images have been analyzed using Digital Volume Correlation to assess the coupling between microstructural features of the material and its mechanical behavior. In addition, the data obtained from the 3D-XRD is used to study how the grain structure including the properties of individual grains influences the deformation and failure. The knowledge gained in the study will be used to improve the utilization of the DCI material in truck components, including by using the new insight to develop computational models that take the material microstructure into account.

9:30 AM  
Revealing 3D Microstructures with High-energy X-rays: Jonathan Almer1; Peter Kenesei1; Jun-Sang Park1; Hemant Sharma1; Meimei Li1; Paul Shade2; Stuart Stock3; 1Argonne National Laboratory; 2Air Force Research Laboratory; 3Northwestern University
    High-energy x-rays from 3rd generation synchrotron sources, including the Advanced Photon Source (APS), possess a unique combination of high penetration power and spatial, reciprocal space, and temporal resolution. These characteristics, coupled with extensive worldwide efforts over the past decades, have produced a variety of 3D imaging techniques using both density and diffraction/scattering contrast. Within the X-ray Science Division at the APS, we have focused on combining several of these techniques to study polycrystalline materials through (i) absorption-based tomography, (ii) high-energy diffraction microscopy (HEDM or 3DXRD) and (iii) scattering tomography. The latter two approaches are complementary, as HEDM provides diffraction information (strain, orientation, shape and size) of individual grains in aggregates while scattering tomography yields spatially resolved but grain-averaged information, particularly relevant for fine-grained materials below HEDM limits. Use of these techniques for in situ studies of biological systems, aerospace and nuclear-relevant materials will be presented, along with descriptions of some enabling in situ equipment. Further development of these techniques will be discussed, both prior to and after the planned APS upgrade to a diffraction-limited source.

9:50 AM Break