Consolidation behaviour of particle reinforced aluminium-matrix powders with up to 50 vol.% SiCp

Consolidation behaviour of particle reinforced aluminium-matrix powders with up to 50 vol.% SiCp


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Abstract. Aluminium-matrix composites (AMC) are produced in order to improve specific properties (e.g. mechanical, thermal or tribological) of the matrix alloy using discontinuous reinforcements like fibres or particles. If functional requirements of application specific components such as brake discs have to be met, reinforcement contents of more than 35 % may be required. Therefore, a new manufacturing route is currently being investigated at the Institute for Metal Forming Technology (IFU) of the University of Stuttgart, combining powder pressing with subsequent semi-solid forming to obtain near-net-shape components. A key challenge of this process route includes compacting the green bodies. In this contribution, therefore, powder pressing of AlSi7Mg0.6 and SiCp powders with up to 50 vol.% SiCp are investigated in order to gain a deeper understanding of the compacting behaviour of powder with particularly high reinforcement contents. During the investigations, homogenously mixed powders were consolidated to a cylindrical green body by uniaxial powder pressing in order to determine the compressibility of different AMC powder mixtures. At first, the influence of the consolidation pressure onto the reached density was analysed, resulting in compressibility curves as well as process limits for different amounts of reinforcement particles. Subsequently, the influence of particle size onto the achieved density as well as consolidation behaviour could be identified. Furthermore, the high tool wear due to the abrasive behaviour of the reinforcement is quantified in this paper.

Metal Matrix Composites (MMC), Compressibility, Powder Pressing

Published online 4/19/2023, 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: SPETH Marco, RIEDMÜLLER Kim Rouven, LIEWALD Mathias, Consolidation behaviour of particle reinforced aluminium-matrix powders with up to 50 vol.% SiCp, Materials Research Proceedings, Vol. 28, pp 1689-1696, 2023


The article was published as article 182 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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