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DOE OSTI · 1396122

From Solidification Processing to Microstructure to Mechanical Properties: A Multi-scale X-ray Study of an Al-Cu Alloy Sample

Tourret, D.·Mertens, J. C. E.·Lieberman, E.·Imhoff, S. D.·Gibbs, J. W.·Henderson, K.·Fezzaa, K.·Deriy, A. L.·Sun, T.·Lebensohn, R. A.·Patterson, B. M.·Clarke, A. J.
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Abstract

We follow an Al-12 at. pct Cu alloy sample from the liquid state to mechanical failure, using in situ X-ray radiography during directional solidification and tensile testing, as well as three-dimensional computed tomography of the microstructure before and after mechanical testing. The solidification processing stage is simulated with a multi-scale dendritic needle network model, and the micromechanical behavior of the solidified microstructure is simulated using voxelized tomography data and an elasto-viscoplastic fast Fourier transform model. This study demonstrates the feasibility of direct in situ monitoring of a metal alloy microstructure from the liquid processing stage up to its mechanical failure, supported by quantitative simulations of microstructure formation and its mechanical behavior.

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36 MATERIALS SCIENCEMechanical TestingMechanical testingProcessing-Microstructure-PropertiesSolidificationX-ray RadiographyX-ray radiography and tomographyX-ray tomography

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Tourret, D., Mertens, J. C. E., Lieberman, E., Imhoff, S. D., Gibbs, J. W., Henderson, K., Fezzaa, K., Deriy, A. L., Sun, T., Lebensohn, R. A., Patterson, B. M., Clarke, A. J.. 2017-09-13. From Solidification Processing to Microstructure to Mechanical Properties: A Multi-scale X-ray Study of an Al-Cu Alloy Sample. https://doi.org/10.1007/s11661-017-4302-8

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