Abstract
An Al-5% Cr-2% Zr (wt%) alloy for elevated temperature service has been rapidly solidified (RS) by gas atomization and planar flow casting (PFC). A comparative study of the atomized powder and the planar flow cast ribbon has been performed during consolidation by extrusion. Particular attention has been given to the microstructural changes during fabrication and the influence of RS particulate type on extrusion performance, microstructure and mechanical properties. Microstructurally it has been shown that the more homogeneous PFC ribbon has advantages over the atomized powder and can improve mechanical properties. However, optimization of the thermomechanical processing of the PFC ribbon is necessary to achieve significant performance benefits in comparison to the atomized powder.
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