High Energy X-ray Diffraction Microscopy (HEDM) - Materials ...

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Near-field Reconstruction: <strong>High</strong> purity nickel One of 42 layer sections, 0.156 mm 3 volume • ~400 grains/layer • ~45 mm ave diameter • Smallest grains 10 mm Black lines: mesh element neighbors with > 0.1 deg misorientation • Sample has well ordered grains • ~0.1 deg experimental orientation resolution Grid elements generate ~100 relevant Bragg peaks Carnegie Mellon MRSEC 20
Zirconium S0: initial state Narrowest cross-section Confidence delineation of grains: thresholding is just right! Note: “Confidence” is not a good statistical metric!
Page 1 and 2: High Energy X-ray Diffraction Micro
Page 3 and 4: Outline 1. Synchrotron radiation so
Page 5 and 6: HEDM Common Feature: Bragg Scatteri
Page 8 and 9: Magnetic Lattices as Sources Wiggle
Page 10 and 11: Undulator X-ray Source
Page 12 and 13: Specialized beam line requirements
Page 14 and 15: June 2012: Commissioning of new cam
Page 16 and 17: Data Flow
Page 18 and 19: Geometry Determination 1. Center 30
Page 22 and 23: Technique Verification: HEDM & EBSD
Page 24 and 25: NIST Single Crystal (?) Ruby Sphere
Page 26 and 27: Simulation of a small grain with or
Page 28 and 29: w Lineshapes w = 93 94 95 96 97 98
Page 30 and 31: Reconstruction compared to broadene
Page 32 and 33: Reconstruction compared to broadene
Page 34 and 35: Simulation Validation
Page 36 and 37: Statistics extraction from large da
Page 38 and 39: Misorientation axes: Ni(Bi) Red lin
Page 40 and 41: Near-field HEDM: Technique Summary
Page 42 and 43: Far-field measurements: Elastic Str

High Energy X-ray Diffraction Microscopy (HEDM) - Materials ...

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