Mageshwari Komarasamy¹, Xiao Li¹, Scott A Whalen¹, Glenn J Grant¹; ¹Pacific Northwest National Laboratory

Significant evidence exists on the formation of extended solid solubility and metastable phases in alloys under severe plastic deformation (SPD) conditions. Friction consolidation is an SPD technique that imparts severe plastic strain at high temperature into the processed volume creating unique microstructures. In the current investigation, friction consolidation of powders and investigation of microstructural evolution using various microscopy techniques were carried out. Significant microstructural changes occurred in all the alloy combinations investigated. For instance, extreme structural refinement had occurred in Al-Si system while extended solubility and metastable phase formation were noted for Cu-Nb system. Overall, the ShAPE process is expected to have the potential to unlock unique combination of microstructures consisting of stable and metastable phases in various alloy systems.