Efficient Processing of Metal-Matrix-Composites by Combining Direct Pressure Sintering and Subsequent Thixoforging


Article Preview

The paper describes a cost effective and innovative combination of direct pressure sintering and subsequent thixoforming to produce MMC-components in (near-) net shape quality and, thus, to make these interesting materials attractive to mass production.First results of some combinations of aluminium matrix alloys with different ceramic reinforcements, consolidated by fast pressure sintering show the efficiency of this technology.The further processing of the consolidated billets has been performed by thixoforging. It can be shown, that the homogeneous microstructure from the direct pressure sintering stage with uniformly distributed ceramic reinforcements can be maintained over the semi-solid state and a full densification can be achieved. Form filling was complete and surface quality was comparable to forgings from conventional alloys.This new process flow shows advantages regarding the material yield in each of the processing steps. The (near-) net shape quality of thixoforged components allows a reduced effort for machining, which is of special importance for composite materials with a high content of wear resistant hard phases like SiC-particles.



Materials Science Forum (Volumes 825-826)

Edited by:

Christian Edtmaier and Guillermo Requena






A. Storz et al., "Efficient Processing of Metal-Matrix-Composites by Combining Direct Pressure Sintering and Subsequent Thixoforging", Materials Science Forum, Vols. 825-826, pp. 167-175, 2015

Online since:

July 2015




* - Corresponding Author

[1] H. Persson, Machining Guidelines of Al/SiC particulate MMC, in: MMC-Assess Thematic Network, 6, Vienna, (2001).

[2] K.U. Kainer, Metal-Matrix-Composites. Custom-made Materials for Automotive and Aerospace Engineering, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, (2006).

DOI: 10.1002/3527608117

[3] A. Evans, Ch.S. Marchi, A. Mortensen, Metal Matrix Composites in Industry, Kluwer Academic Publishers, Dordrecht/Boston/London, (2003).

[4] I. Özer, Legierungstechnische und tribologische Entwicklung von Bremsscheiben aus sprühkompaktierten Aluminium-Matrixkompositen. Schriftenreihe Werkstoffe und Werkstofftechnische Anwendungen, Band 51, Eigenverlag TU Chemnitz, Chemnitz, (2013).

[5] K. R. Riedmüller, M. Liewald, L. Kertesz, Manufacture of Composite and Hybrid Materials by Semi Solid Forming, in: Solid State Phenomena 192-193 (2013) 89-94.

DOI: 10.4028/www.scientific.net/ssp.192-193.89

[6] M. C. Flemings, Behaviour of Metal Alloys in the Semisolid State, Metallurgical Transactions A, 22A (1991) 957-981.

[7] D. Raybould, The properties of stainless steel compacted dynamically to produce cold interparticle welding, in: Journal of Material Science 16 (1981) 589-598.

DOI: 10.1007/bf02402774

[8] Th. Schubert, B. Lorenz, J. Steger, Th. Weißgärber, R. Neugebauer, B. Kieback, Microstructure and Mechanical Properties of melt-spun Aluminium Alloys consolidated by Spark Plasma Sintering and Forging, in: Proceedings of the 2012 Powder Metallurgy World Congress, Yokohama, (2013).

[9] P. J. Uggowitzer, G. -C. Gullo, Metallkundliche Aspekte bei der Semi-Solid Formgebung von Leichtmetallen, in: Vom Werkstoff zum Bauteilsystem, Hrsg.: H. Kaufmann und P.J. Uggowitzer, LKR-Verlag, Ranshofen (2000) 95-107.

[10] G. Meßmer, Gestaltung von Werkzeugen für das Thixo-Schmieden von Aluminium und Messinglegierungen in automatisierten Schmiedezellen; Dissertation an der Universität Stuttgart, (2006).

[11] G. Hirt, R. Kopp, Thixoforming: Semi-Solid Metal Processing, Wiley-VCH, Weinheim, (2009).

[12] A. Wolf, Thixo-Schmieden von Al-Mg-Si Legierungen, Dissertation am Institut für Umform-technik, Universität Stuttgart, Fakultät Maschinenbau, (2003).

[13] F. Simancik, G. Jangg, H.P. Degischer, Short carbon fiber-aluminium matrix composite material prepared by extrusion of powder mixtures, in: Journal de physique IV, Colloque C7, supplément au Journal de physique III (1993).

DOI: 10.1051/jp4:19937281

In order to see related information, you need to Login.