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Meeting Materials Science & Technology 2020
Symposium Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales II
Presentation Title Synchrotron X-ray Tools for Multiscale Studies of Microstructure Evolution
Author(s) Matthew Wilkin, Yueheng Zhang, Yufeng Shen, He Liu, Anthony D Rollett, Robert M. Suter
On-Site Speaker (Planned) Robert M. Suter
Abstract Scope High energy x-ray diffraction microscopy (HEDM) makes possible the in-situ observation of internal microstructure evolution at micron to millimeter length scales. Maps of crystal unit cell orientations and grain averaged strain tensors characterize cubic millimeter volumes of polycrystalline samples. Responses to thermal and mechanical loadings have been tracked. However, observed responses show emergent behaviors caused by unseen nanoscale defect motions. Development of predictive models requires experimental observations of the connections between these regimes. Defect motions have been observed in individual nanoscale particles using X-ray Bragg coherent diffractive imaging (BCDI) which is sensitive to atomic displacements on Angstrom length scales. With collaborators at Argonne and Los Alamos National Laboratories, we are working to combine BCDI with HEDM and scanning Laue diffraction methods in order to connect these measurements and length scales. An overview of progress will be given. Our work is supported by DOE/BES grant DESC0019096.


Applications of Computational Polarized Light Microscopy for Large Area Orientation Determination of alpha-Titanium
Bridging Computational Modeling and In Situ Experiment to Decipher Microscopic Deformation Mechanics
Characterization of 3-D Slip Fields in Deforming Polycrystals
Combining Multi-scale Modeling and Three-Dimensional Diffraction to Investigate Chemical and Displacement Ordering in Metallic Alloys
Design of an Austenitic Steel Weldment System Using ICME
Development of a Reactive Forcefield to Model Cu-Ni Alloy Oxidation and Surface Segregation in Thermal Conditions
Diffraction Elastic Constants from Electron Backscatter Diffraction Data and Finite Element Models
Directionally-anisotropic Mobility of Faceted Boundaries Explained through Interfacial Dislocation Mechanisms
ECCI Image Simulations for Arbitrary Defect Displacement Fields
Electron Backscatter Diffraction Pattern Simulation for Interaction Volume Containing Lattice Defects
Experimental Capabilities at High Pressure Collaborative Access Team (HPCAT) for In-situ and In-operando Characterization of Pressure/Stress Induced Microstructural Changes in Materials
Integrating Materials Models and Dynamical Electron Diffraction Simulations for Dislocation Analysis using STEM-Defect Contrast Imaging
Investigating the Microstructural Origins of Hydrogen Effects on Deformation and Fracture
Novel Remapping Method for HR-EBSD Based on Computer Vision Algorithm
On the Characterization of Twin-twin Interactions in Mg and Its Alloys
Predicting the Stress Strain Behavior of Nickel Single Crystal Through an Integrated First-principles Calculation and Crystal Plasticity Finite Element Modeling Approach
Regulating Elastic and Plastic Deformations by Microstructure Design and Coupling between Deformation and Phase Transformation - An Integrated Modeling and Experimental Study
Strong strain hardening in ultrafast melt-quenched nanocrystalline Cu: the role of fivefold twins
Synchrotron X-ray Tools for Multiscale Studies of Microstructure Evolution
Texture Evolution of Individual Layers during Accumulative Roll Bonding of Fe-Cu Metallic Laminates
Twinning Nucleation in Hexagonal Close-packed Crystals
Ultra-high strength and plasticity mediated by partial dislocations and defect networks

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