Experimental study on effect of temperature on mechanical properties of graphite fibre reinforced Al matrix composites

Abstract

A continuous graphite fibre reinforced aluminium matrix composite (Grf/Al) with 60 vol.-% Grf content was produced by squeeze casting technology. The composite was dense and macroscopically homogeneous, and only a small amount of aluminium carbide was found in the Gr/Al interface. Tensile and bending strengths of Grf/Al composites have been measured in the temperature range between −40 and 100°C. With increasing tested temperatures, the tensile and bending strengths of Grf/Al composites were enhanced from 891 to 1095 MPa and from 967 to 1234 MPa respectively. The temperature dependence mechanisms of composite strength were analysed in terms of changing of residual stress and mechanical properties of matrix respectively.

Effect of fabrication parameters on carbon fibre reinforced magnesium matrix composite components

“…Further filling can be achieved with higher infiltration pressure for a long holding time after the infiltration. 22–24 Uniform distributions of fibres in the matrix can be achieved ( see Fig. 5 b ).…”

Laser and resistance joining of aluminum–graphite composite

“…Calder et al (1998) argue that casting is the most economical manufacturing process for this composite since it can produce almost unlimited shapes and sizes in three dimensional (3D) forms. Zhang and Wu (2010) investigate the mechanical properties of squeeze cast MMC with 5-m continuous graphite fibers in Al 6 wt% Mg matrix at different temperatures. They report the favorable and expected ultimate tensile strength ratio for MMC/matrix of 2.60 at −40 • C, 3.05 at 20 • C, and 3.66 at 100 • C. In addition to the advantage in mechanical properties, the Al-Gr composites can effectively remove heat during service while eliminating thermal stress.…”

Effect of holding pressure on densification and mechanical properties of Cf/Mg composites

“…Equipment requirements in vacuum pressure infiltration process are more comprehensive and complex compared with other fabrication methods [12]. Liquid-solid extrusion directly following vacuum infiltration (LSEVI) is a special technique that combines the advantages of traditional vacuum infiltration and squeeze casting process, in which magnesium alloy melting, preform preheating, vacuum infiltration and liquid-solid extrusion can be integrated in an experiment system [13][14][15]. crystallised and solidified in the carbon fibre preform under an appropriate pressure.…”

“…12 Liquid-solid extrusion directly following vacuum infiltration (LSEVI) is a special technique that combines the advantages of traditional vacuum infiltration and squeeze casting process, in which magnesium alloy melting, preform preheating, vacuum infiltration and liquid-solid extrusion can be integrated in an experiment system. [13][14][15] crystallised and solidified in the carbon fibre preform under an appropriate pressure. However, the introduction of carbon fibres brings a variation in the densification process of C f /Mg composites.…”