Solid-State Recycling of Aluminum Alloy (AA-6061) Chips via Hot Extrusion Followed by Equal Channel Angular Pressing (ECAP)

Document Type : Original Article

Authors

Mechanical Design and Production Department, Faculty of Engineering, Zagazig University

Abstract

Aluminum alloy (AA-6061) chips were recycled using hot extrusion followed by
equal channel angular pressing (ECAP) process at room temperature. AA-
6061chips were cold compacted into billets, then extruded into rods under
extrusion ratio of 5.2 at different extrusion temperatures (ET). Finally, the rods
were processed through ECAP die with inner angle Φ of 90°, and outer arc angle Ψ
of 32.8°, which impose strain ɛ of 1 per each pass up to different number of passes.
The effects of the ECAP number of passes and extrusion temperature on the
microstructure and mechanical properties were fully investigated. Grain refinement
were noted after the ECAP process. Moreover, the ECAPed samples revealed
higher mechanical properties than those of the extruded samples. The extrusion
temperature (ET) and the number of the ECAP passes have an obvious effect on
both the microstructure and mechanical properties of the solid state recycled chips
samples.

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