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- W4287774263 abstract "Hexagonal metals have anisotropic coefficients of thermal expansion causing grain-level internal stresses during heating. High energy x-ray diffraction microscopy, a non-destructive, in situ, micromechanical and microstructural characterization technique, has been used to determine the anisotropic coefficients of thermal expansion (CTEs) for Ti-7Al. Two samples of polycrystalline $alpha$-phase Ti-7Al were continuously heated from room temperature to 850 $^circ$C while far-field HEDM scans were collected. The results showed a change in the ratio of the CTEs in the 'a' and 'c' directions which explains discrepancies found in the literature. The CTE additionally appears to be affected by the dissolution of $alpha_2$ precipitates. Analysis of the grain-resolved micromechanical data also shows reconfiguration of the grain scale stresses likely due to anisotropic expansion driving crystallographic slip." @default.
- W4287774263 created "2022-07-26" @default.
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- W4287774263 date "2020-05-29" @default.
- W4287774263 modified "2023-10-16" @default.
- W4287774263 title "Grain-Resolved Temperature-Dependent Anisotropy in Hexagonal Ti-7Al Revealed by Synchrotron X-Ray Diffraction" @default.
- W4287774263 doi "https://doi.org/10.48550/arxiv.2006.00065" @default.
- W4287774263 hasPublicationYear "2020" @default.
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