Record Details

Title:
Three-Dimensional Imaging of Phase Ordering in an Fe-Al Alloy by Bragg Ptychography
Affiliation(s):
EuXFEL staff, Other
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Instrument MID
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Abstract:
We show three-dimensional images of phase ordering in a $Fe _{55} Al_{45}$ alloy obtained by coherent x-ray diffraction Bragg ptychography. Fe-Al alloys display ordered phases where the atoms organize on sublattices resulting in the emergence of otherwise forbidden superlattice reflections. The degeneracy of the ordering results in antiphase domain boundaries that, in addition to the general lattice strain, provide phase shifts of the diffracted beam depending on the reflection. The reconstructed phase images can be separated into components originating from $B2$ phase domains and lattice strain by performing Bragg ptychography on both the (002) fundamental and the (001) superlattice reflections.
Imprint:
American Physical Society, 2018
Journal Information:
Physical Review Letters, 121 (25), 256101 (2018)
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Language(s):
English
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