Mechanical properties and electrical conductivity of cold rolled Al-7.5wt%Y alloy with heterogeneous lamella structure and stacking faults

Abstract

Strength, ductility, and electrical conductivity are always mutually exclusive to each other in conductor materials. Although numerous strategies were proposed, aiming at breaking the dilemmas between strength and ductility, or strength and conductivity, a better solution to solve them all is still a thirst for Al alloys. In this paper, we produced an Al-7.5Y alloy with heterogeneous lamella structure and stacking faults (SF) via cold rolling. The results indicate that the as-rolled Al-Y specimen shows a simultaneous increase in strength and electrical conductivity compared to that of the as-cast counterpart. Interestingly, the as-rolled Al-Y specimen has nearly the same uniform elongation as the pure Al counterpart. The deformation behavior, strengthening mechanism as well as the conductive mechanism of the as-rolled Al-Y alloy were revealed by electron microscopy and in-situ X-ray diffraction. Data AvailabilityThe authors confirm that the data supporting the findings of this study are available within the article.