Continuous Powder Extrusion for Fabrication of Carbon Fibre Reinforced Aluminium

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Short fibre reinforced aluminium was produced using the Temconex® process which is a continuous extrusion using a mixture of metal powder and ceramic short fibre as feedstock. The Temconex® process was derived and further developed from the ConformTM process which uses metal rod rather than powder as feedstock. In the present paper the effect of the prechamber length on the mechanical properties was examined. As material Al99.7 powder with different volume fractions of milled carbon fibres was used. Distribution, orientation and geometry of the embedded fibres were examined using light microscopy. The mechanical properties were determined via tensile testing and resonance frequency analysis. An important increase of the Young’s modulus is observed because of the introduction of fibres. It can be rationalized based on Clyne’s Shear Lag model. Results show that an extension of the prechamber enhances the Young’s modulus and the elongation of fracture due to reduced fibre fracture and better fibre alignment.

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Edited by:

Prof. Axel S. Herrmann

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158-164

Citation:

M. Saefkow et al., "Continuous Powder Extrusion for Fabrication of Carbon Fibre Reinforced Aluminium", Key Engineering Materials, Vol. 742, pp. 158-164, 2017

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July 2017

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[1] N. Chawla, K.K. Chawla, Metal matrix composites, Springer, New York, NY, (2006).

[2] J.W. Kaczmar, K. Pietrzak, W. Włosiński, The production and application of metal matrix composite materials, Journal of Materials Processing Technology 106 (2000) 58–67.

DOI: https://doi.org/10.1016/s0924-0136(00)00639-7

[3] A. Slipenyuk, V. Kuprin, Y. Milman, V. Goncharuk, J. Eckert, Properties of P/M processed particle reinforced metal matrix composites specified by reinforcement concentration and matrix-to-reinforcement particle size ratio, Acta Materialia 54 (2006).

DOI: https://doi.org/10.1016/j.actamat.2005.08.036

[4] T.W. Clyne, A simple development of the shear lag theory appropriate for composites with a relatively small modulus mismatch, Materials Science and Engineering: A 122 (1989) 183–192.

DOI: https://doi.org/10.1016/0921-5093(89)90629-1

[5] M. Taya, R.J. Arsenault, A comparison between a shear lag type model and an eshelby type model in predicting the mechanical properties of a short fiber composite, Scripta Metallurgica 21 (1987) 349–354.

DOI: https://doi.org/10.1016/0036-9748(87)90227-4

[6] C.A. Stanford-Beale, T.W. Clyne, Extrusion and high-temperature deformation of fibre-reinforced aluminium, Special Issue: Metal Matrix Composites 35 (1989) 121–157.

DOI: https://doi.org/10.1016/0266-3538(89)90092-4

[7] H.K. Slater, C. Etherington, Prospects for the continuous extrusion forming of new materials by the conform process, Proceedings of the 2. Conference on Materials Engineering London (1985).

[8] J.D. Heywood, C.S. Treadwell, Aluminium alloy and composite extrusion by conform process, S. Konf. -Einzelbericht: Aluminium Alloys: New Technologies Int. Conf., Marina di Ravenna 77–85.

[9] C. Stadelmann, A. Lohmüller, M. List, R.F. Singer, Temconex® - Continuous powder extrusion – Part I: Material flow and pressure generation, Journal of Materials Processing Technology (to be published).

[10] T.W. Clyne, P.J. Withers, An introduction to metal matrix composites, first. paperback ed., Cambridge Univ. Press, Cambridge, (1995).

[11] ASTM International, Standard Test Method for Dynamic Young's Modulus, Shear Modulus, and Poisson's Ratio by Impulse Excitation of Vibration, E1876-07, West Conshohocken, PA, 2007 (2007), Information on www. astm. org.

DOI: https://doi.org/10.1520/e1876

[12] B. Maddock, Strangpressen von Aluminium nach einem neuartigen Verfahrensprinzip, Aluminium 54 (1978) 207–211.

[13] M. Starink, S. Syngellakis, Shear lag models for discontinuous composites: fibre end stresses and weak interface layers, Materials Science and Engineering: A 270 (1999) 270–277.

DOI: https://doi.org/10.1016/s0921-5093(99)00277-4