The hot deformation behaviour of laser powder bed fusion deposited Al–Si–Cu alloy processed by high-pressure torsion

Abstract The tensile properties of an ultrafine-grained Al–9%Si–3%Cu alloy deposited by the laser powder bed fusion process have been investigated in this work. additively manufactured (AM) was subjected to high-pressure torsion processing at room temperature successfully different number turns HPT and then inspected through hot testing 298 573 K using strain rates ranging from 10 –1 –4 s −1 . processed showed extensive refinement high dislocation density that associated with considerable strength ambient temperature. as-deposited samples exhibited significantly higher elongation under deformation conditions compared their cast counterpart alloys. temperature-HPT presented ultrafine α -Al well-distributed nanosized eutectic Si particles which improved behaviour thermal stability microstructures. formation fibrous structures has enhanced flow cavitation resistance elevated current work indicates impact on mechanical performance controllable AM-deposited meet industrial needs without further heat treatments or alloying additions.