engleski

Compressive flow stress and hardness determination for composites based on aluminum waste

Main aim of this paper is to present a novel method for aluminum chips recycling without remelting and to present production of composites based on aluminum waste. With presented method environmental pollution is significantly smaller compared to conventional aluminum recycling. Aluminum chips were mixed with aluminum oxide (Al2O3) powder, compacted into billets and direct hot extruded into round bars. Obtained bars were finally processed with severe plastic deformation (SPD) in order to produce high quality recycled composites. SPD was performed utilizing equal channel angular pressing (ECAP) process. Influence of aluminum oxide addition in the recycled samples on compressive flow stress curves and hardness was determined. Compressive flow stress curves and hardness were determined for samples obtained by direct hot extrusion and for samples obtained by combination of direct hot extrusion and ECAP process. Results are compared with commercially produced EN AW 6082 in T6 and O temper conditions.

Solid state recycling ; Aluminum waste composites ; Severe plastic deformation ; Hardness ; Compressive flow stress curves

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