IntroductionThe increasing of aluminum alloys’ strength without significant sacrifice in electrical conductivity is a current trend in industry. With this in mind, finding ways to simultaneously improve mechanical and electrical properties is important. This combination is essential for creating new lightweight conductive materials for the electrical industry based on ultra‐fine grained (UFG) Al–Fe alloys.Aluminum alloys, particularly Al–Fe alloys, have several advantages as conductive materials. Firstly, aluminum and iron are very common and cheap metals, which make them economically attractive. Moreover, bauxite ore contains up to 5% iron, which means that alloying is not needed. Secondly, solubility of iron in aluminum for conventionally processed alloys at room, and up to near‐melting, temperatures is close to zero. This eliminates the major contributor to electrical resistivity, that is, solid solute atoms (the other contributors are grain boundaries, particles, and dislocation density).The combination of these two factors makes Al–Fe alloys valuable for weight‐saving applications in automobile or aerospace industries. However, traditional methods of treatment, such as casting and subsequent drawing, provide a medium level of strength and conductivity, where strength is not sufficient for high mechanical loading applications.Multiple publications have demonstrated that severe plastic deformation (SPD) methods provide significant strengthening of Al–Fe alloys.
Advanced Engineering Materials – Wiley
Published: Jan 1, 2018
Keywords: ; ; ; ; ;
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