Title: Short particle strengthened aluminium alloy, fracture toughness investigated with instrumented impact tests

Authors: T. Varga, G. Schabl

Addresses: Institute for Testing and Research in Materials Technology, Vienna University of Technology, Karlsplatz 13/030, A-1040 Wien, Austria. ' Institute of Materials Science and Materials Testing, Vienna University of Technology, Karlsplatz 13/308, A-1040 Wien, Austria.

Abstract: For different aluminium matrix alloys values of fracture mechanics were determined and compared. The investigated materials were aluminium matrix alloys with an aluminium matrix of AA 6061 (AlMg 1 SiCu) reinforced by small alumina (Al₂O₃) particles. Three point bend specimens with four different percentages of reinforcement, different notch orientation with electro eroded cuts or fatigue crack were investigated. The values of fracture mechanics were determined by instrumented impact with an impact velocity of 0.1 m/s. The outcome shows the behaviour of values of fracture mechanics over the percentage of reinforcement. The result shows that the instrumented impact test is a reasonable tool for the optimisation of materials for specific applications.

Keywords: fracture mechanics; fracture toughness; instrumented impact tests; metal matrix composites; MMC; reinforcement percentage; aluminium alloys.

DOI: 10.1504/IJMPT.1999.036266

International Journal of Materials and Product Technology, 1999 Vol.14 No.2/3/4, pp.183 - 198

Published online: 01 Nov 2010 *

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