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- W2034199021 abstract "Powder compacts from two different commercial aluminium powder grades have been densified by direct hot extrusion. The extrusion runs have been carried out at 425 °C, with an extrusion ratio of 1:16 and a ram speed of 1.5 mm/s. Prior to extrusion, some green compacts were presintered (500 °C). The evolution of the extrusion load during the process and the hardness of the final products have been investigated. Additionally, microstructural characterization by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Electron Backscattered Diffraction (EBSD) was carried out in order to understand the softening-hardnening mechanisms taking place during the process. The obtained results evidence grain refinement. Additionally, inter-metallic precipitation, dynamic recovery and geometric dynamic recrystallization take place depending on the composition of the powder, the heat treatment before extrusion and the strain involved in the process." @default.
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- W2034199021 date "2007-01-01" @default.
- W2034199021 modified "2023-09-27" @default.
- W2034199021 title "Softening-Hardening Mechanism in the Direct Hot-Extrusion of Aluminium Compacts" @default.
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- W2034199021 doi "https://doi.org/10.4028/www.scientific.net/msf.534-536.837" @default.
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