Effect of Composition, Particle Size, and Heat Treatment on the Mechanical Properties of Al-4.5 wt.% Cu Based Alumina Particulate Reinforced Composites

Paper #:
  • 980700

Published:
  • 1998-02-23
Citation:
Seleznev, M., Argon, A., Seleznev, I., Cornie, J. et al., "Effect of Composition, Particle Size, and Heat Treatment on the Mechanical Properties of Al-4.5 wt.% Cu Based Alumina Particulate Reinforced Composites," SAE Technical Paper 980700, 1998, https://doi.org/10.4271/980700.
Pages:
9
Abstract:
The quest for higher efficiency and performance of automotive vehicles requires application of materials with high strength, stiffness and lower weight in their construction. Particulate-reinforced aluminum-matrix composites are cost-competitive materials, which can meet these requirements. MMCC, Inc. has been optimizing particulate-reinforced alloy systems and developing the Advanced Pressure Infiltration Casting (APIC™) process for the manufacture of components from these materials. This paper discusses the results of a recent study in which composites reinforced with 55 vol.% alumina were cast using two sizes of alumina particulate and eight different matrix alloys based on Al-4.5 wt.% Cu with varying amounts of silicon and magnesium. Optimum heat treatments for each alloy were determined utilizing microhardness studies. The tensile strength and fracture toughness were evaluated as a function of alloy chemistry, particulate size, and heat treatment. MMCC has used one of these composite materials, 2214/Al203-55p/T6, to cast composite brake calipers and connecting rods that provide significant weight savings over their ferrous counterparts.
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