Spark Plasma Sintering And KOBO Extrusion As Effective Route For Manufacturing Al-nSiC Composite Profiles

Authors:

Volf Leshchynsky (Łukasiewicz Research Network – Poznań Institute of Technology, Poland),
Rafał Rubach (Łukasiewicz Research Network – Poznań Institute of Technology, Poland),
Marco De Pamphilis (MBN Nanomaterialia, Italy),
Alberto Coella (MBN Nanomaterialia, Italy),
Paolo Matteazzi (MBN Nanomaterialia, Italy),
Dariusz Garbiec (Lukasiewicz Research Network – Poznan Institute of Technology, Poland),
Volf Volf (Lukasiewicz-PIT, Poland)

Abstract:

FAST|SPS-KOBO manufacturing technology is being developed within the Horizon 2020 project (LightMe) as a promising route for manufacturing aluminum alloy profiles. The main advantages of applying the KOBO cyclic extrusion severe deformation technique are the reduction of the processing energy and the great increase in intensity of the deformation and dynamic recrystallization processes. The SPS technique for manufacturing fully dense AA7075-3wt%nSiC metal matrix composite (AAMC) cylindrical preforms, followed by KOBO extrusion at ambient temperature allows the production of rods 8 mm in diameter and 800–1000 mm in length with a trimodal structure. The microstructure and mechanical properties of the AA7075-3nSiC composites with a bimodal grain laminated microstructure are investigated. The manufactured rods are characterized by a yield strength of >400 MPa, ultimate tensile strength of >510 MPa, tensile strain of 5.4–11% and Vickers hardness of approx. 1.2 GPa.

DOI:

https://doi.org/10.59499/WP225371812