Structural and Mechanical Properties of Al/B4C Composites Fabricated by Wet Attrition Milling and Hot Extrusion

doi:10.1016/j.jmst.2013.04.015

Abstract

Abstract:

In this study, Al matrix composites reinforced by 7.5 and 15 vol.% B₄C particles and also monolithic Al (Al without the B₄C particles) were produced by wet attrition milling and subsequent hot forward extrusion processes. The microstructure of the composites, evaluated by scanning electron microscopy (SEM), showed that the B₄C particles were properly distributed in the Al matrix. Mechanical properties of the Al/B₄C composites and monolithic Al were investigated by tensile, wear and hardness tests. The results revealed that with increasing content of B₄C particles, the tensile strength and microhardness of composites increased but the elongation decreased. In addition, the tensile strength and microhardness of composite samples were higher than those of monolithic Al. The density measurements revealed that the density of composites decreased with increasing content of the B₄C particles.

Key words: Composites, Mechanical properties, Attrition milling, Hot extrusion

Morteza Alizadeh, Mostafa Alizadeh, Rasool Amini. Structural and Mechanical Properties of Al/B₄C Composites Fabricated by Wet Attrition Milling and Hot Extrusion[J]. J. Mater. Sci. Technol., 2013, 29(8): 725-730.

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Structural and Mechanical Properties of Al/B₄C Composites Fabricated by Wet Attrition Milling and Hot Extrusion

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