Abstract
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.
Highlights
The increased demand for weight reduction in components used in the aerospace and automotive industries requires the development of ever stronger materials
Green pellets were first extruded with an indirect press, as lower pressure and processing route and parameters
Green pellets were first extruded with an indirect press, as lower energy consumption is required compared to direct extrusion
Summary
The increased demand for weight reduction in components used in the aerospace and automotive industries requires the development of ever stronger materials. Due to their low density, aluminum alloys reinforced with various particles have been developed for weight-critical applications, which have a better specific strength compared to the basic matrix material. When reinforcing particles are added to the base metal, the ductility of the composite material is significantly worse, there are beneficial effects on specific strength and wear resistance [1,2,3,4,5]. For a detailed overview of aluminum reinforced composites, please refer to Reference [14]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
