Friction extrusion processing of aluminum powders: Microstructure homogeneity and mechanical properties

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review


Friction extrusion (FE) is a solid-state process categorized as an energy-efficient process, utilizing the intrinsic friction-induced heat to plasticize and manufacture fully consolidated extrudate from various feedstocks, i.e. solid billet, chips and powder. Friction in the relative motion between the feedstock and the non-consumable die generates heat as well as imposes severe plastic deformation; this combination enables dynamic recrystallization and refinement of the microstructure. This study demonstrates the feasibility of directly extruding aluminum alloy powder into fully consolidated wire in a single step process. The extrudate is free of noticeable defects and shows predominantly homogeneous microstructure along the cross-section of the wire. The powder evolution upon passing through the die orifice was investigated in terms of morphology and microstructure. Additionally, the mechanical properties of the extrudate, i.e. microhardness and ultimate tensile strength, were compared to solid billets of AA7075 in different temper states and shows adequate mechanical properties without possible post-heat treatments.

Original languageEnglish
Title of host publicationMaterial Forming : The 26th International ESAFORM Conference on Material Forming - ESAFORM 2023 - held in Kraków, Poland, April 19-21, 2023
EditorsLukasz Madej, Mateusz Sitko, Konrad Perzynski
Number of pages8
Place of PublicationMillersville
PublisherMaterialsResearchForum LLC
Publication date19.04.2023
Article number56
ISBN (Print)978-1-64490-246-2
ISBN (Electronic)978-1-64490-247-9
Publication statusPublished - 19.04.2023
Event26th International ESAFORM Conference on Material Forming 2023 - AGH University of Science and Technology, Kraków, Poland
Duration: 19.04.202321.04.2023
Conference number: 26

Bibliographical note

Publisher Copyright:
© 2023, Association of American Publishers. All rights reserved.

    Research areas

  • Aluminum, Friction Extrusion, Powder Consolidation, Solid-State Processing
  • Engineering