Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1498574 | Scripta Materialia | 2014 | 4 Pages |
Abstract
The pre-existing porosity behaviour of globular semi-solid Al–Cu alloys during uniaxial compression is quantified during time-resolved synchrotron tomography at ∼64% and ∼93% solid. At ∼64% solid, both tortuous and round pores exist before deformation, respectively persisting and closing during compression, while at ∼93% solid, pre-existing tortuous pores open under compressive axial strain. It is demonstrated that pore behaviour reflects the immediate grain neighbourhood where the semi-solid alloy acts as a granular material, and that pore opening results from shear-induced dilation during uniaxial compression.
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Authors
K.M. Kareh, P.D. Lee, R.C. Atwood, T. Connolley, C.M. Gourlay,