In-depth comparison of an industrially extruded powder and ingot Al alloysBombač, David (Avtor) Cvahte, Peter (Avtor) Balog, Martin (Avtor) Kugler, Goran (Avtor) Terčelj, Milan (Avtor) aluminum powderhot extrusionhot compressionactivation energyAn industrial press was used to consolidate compacted aluminum powder with a nominal diameter in the range of 1 µm. Direct and indirect hot-extrusion processes were used, and suitable process parameters were determined from heating conditions, ram speeds and billet temperatures. For comparison, a direct-extrusion press for hot extrusion of a conventional aluminum alloy AA 1050 was used. The extruded Al powder showed better mechanical properties and showed a thermal stability of the mechanical properties after annealing treatments. To increase the theoretical density of the directly extruded Al powder, single-hit hot-compression tests were carried out. Activation energies for hot forming were calculated from hot-compression tests carried out in the temperature range 300–580 °C, at different strain rates. Processing maps were used to demonstrate safe hot-working conditions, to obtain an optimal microstructure after hot forming of extruded Al powder.20202022-01-17 08:51:22Članek v reviji134460sl