Comparison of different machine control modes during friction extrusion of AA2024
Harikrishna Rana, Chang Chan, Uceu F.H. Suhuddin, Noomane Ben Khalifa, Benjamin Klusemann
Abstract. The friction extrusion process has recently been explored for manufacturing extrudates with unique microstructures and improved material properties. The process can be classified as a severe plastic deformation (SPD) process in which the compressive shear strains and friction-induced heat play a key role in achieving an intensely refined microstructure. The microstructure can be orchestrated by distinctive heating and plastic deformation conditions from different process parameters, viz. extrusion force, extrusion speed, spindle rotation speed, etc. Notably, the process dynamics lead to different strains and temperatures across the traverse and longitudinal sections of the extrudates, eventually resulting in distinctive microstructures. The present work focuses on comparing the responses of two different machine control modes viz., force and displacement control. The extrudate produced using displacement-control mode exhibited superior process stability, whereas force-control mode resulted in a more unstable process characterized by fluctuating spindle torques, varying extrusion speeds, and elevated temperatures, ultimately leading to lower extrudate quality. These process variabilities were reflected in the microstructures of the extrudates, particularly in the grain structures and defect formations.
Keywords
Friction Extrusion, Aluminum, Displacement-Control, Force-Control
Published online 5/7/2025, 8 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Harikrishna Rana, Chang Chan, Uceu F.H. Suhuddin, Noomane Ben Khalifa, Benjamin Klusemann, Comparison of different machine control modes during friction extrusion of AA2024, Materials Research Proceedings, Vol. 54, pp 772-779, 2025
DOI: https://doi.org/10.21741/9781644903599-83
The article was published as article 83 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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