Small-angle scattering tomography of precipitation-hardened multilayer Al/Al-Zn/Al model alloys

Abstract

Tomographic images constructed from small-angle X-ray scattering (SAXS) intensities utilizing microbeams have been examined for a model multilayered aluminum alloy sample heat-treated to form spatially modulated composition and microstructures. Spatial distributions of composition and precipitation microstructure have been examined by one-dimensional scanning SAXS measurements and two-dimensional tomographic images of attenuation parameters and integrated intensity of SAXS intensity. Reconstructed images using the integrated intensity reflected the distribution of precipitates in terms of their volume fraction over the sample inside the sample, and agreed with more detailed analysis made in the one-dimensional case.