Investigation of plastic yielding in near-micrometer grain size aluminum using synchrotron microdiffraction

Zhang, C L; Godfrey, A; Gao, W. Q.; Zhang, Y B; Wu, G. L.; Liu, W.; Xu, R. Q.; Jensen, D. Juul

doi:10.1088/1757-899X/580/1/012056

Investigation of plastic yielding in near-micrometer grain size aluminum using synchrotron microdiffraction

Conference · 01 January 2019

DOI:https://doi.org/10.1088/1757-899X/580/1/012056· OSTI ID:1872232

Zhang, C L; Godfrey, A; Gao, W. Q.; Zhang, Y B; Wu, G. L.; Liu, W.; Xu, R. Q.; Jensen, D. Juul

The onset of plastic yielding has been studied in samples of aluminum with nearmicrometer average grain size using in situ tensile loading combined with synchrotron radiation. A white-beam Laue 3D micro-diffraction technique was used allowing the collection of diffraction signal from a volume with a resolution of 1 μm in all three dimensions. The orientation data obtained from the micro-diffraction are used to estimate the local variation in geometrically necessary dislocation density, and correction factors are suggested for voxels where neighbors are missing in either one or two dimensions. The results demonstrate a considerable heterogeneity in deformation in the early stages of plastic deformation.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); European Research Council (ERC)

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1872232

Resource Relation:: Conference: 40th Riso International Symposium on Materials Science, 09/02/19 - 09/06/19, Roskilde, DK

Country of Publication:: United States

Language:: English

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