20.500.12556/RUL-134460 In-depth comparison of an industrially extruded powder and ingot Al alloys An 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. aluminum powder hot extrusion hot compression activation energy true false true Angleški jezik Ni določen Članek v reviji 2022-01-17 08:51:22 2022-01-17 08:51:23 2022-09-13 03:55:18 0000-00-00 00:00:00 2020 0 0 18 str. iss. 11, art. 1483 Vol. 10 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 2075-4701 10.3390/met10111483 36233219 RAZ_Bombac_David_2020.pdf RAZ_Bombac_David_2020.pdf 1 EA0D27175558E520A5E6F7F3A553AFE6 1b3e032b33a78f98ce308dfb01003c21038a5b7458257890c218714f3e2411ac 5fc13942-776a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152923 https://www.mdpi.com/2075-4701/10/11/1483 0 3cb3d8c7-776a-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152922 Naravoslovnotehniška fakulteta 0 0 0