Vol.2, No1&2, 2002, pp. 11-14
UDC 669.715'721  669.018.95:661.665.1

THE EFFECT OF REINFORCEMENT CONTENT ON IMPACT TOUGHNESS OF

CAST Al-SiCP METAL MATRIX COMPOSITE

Meri Burzić 1

Stojan Sedmak 2

Zijah Burzić 3

Dragan Jaković 3

Dejan Momčilović 3

1 Military Technical Institute, Belgrade

2 Faculty of Technology and Metallurgy, University of Belgrade

3 Institute for Material Testing, Belgrade

Abstract

The effect of Mg content in matrix and volume entail of SiC particles in metal matrix composite (MMC) on impact toughness is analysed. Cast AlMg alloy with 3%, 5% and 7% Mg content is used as metal matrix. Reinforcement content of 2%, 5% and 10%, with an average particle size of 30 m, had been applied. Composite is obtained by whirlpool casting method.

The impact energy of metal matrix composite with AlMg matrix decreases with increasing SiC content and with decreasing Mg content. The highest total energy is found in MMC AlMg7 with 2% SiC (14.7-17.5 J), and the lowest one in MMC AlMg3 with 10% SiC (3.7-4.1 J). The values for metal matrix composite are bellow that of corresponding alloy for 40 to 50%

Keywords: Metal-matrix composite (MMC), MgAl alloy, SiC reinforcement, impact energy, Charpy V specimen

full article - only in Serbian (550 kB)