High Temperature Tensile Behaviour of Ceramic-Hybridized Metal Matrix Composites for Above-Room-Temperature Applications

The main aim of this study was to produce hybrid metal matrix composites (HMMCs) using the stir casting method, by integrating different ceramic particles in a 3:2 ratio. The results of the scanning electron microscope (SEM) study revealed a uniform distribution of the reinforcing particles throughout the matrix of the hybrid metal matrix composites (HMMCs). The existence of these reinforcing particles inside the matrix was further confirmed using X-ray diffraction (XRD). The Al2618 alloy exhibited a significant reduction in its ultimate tensile strength (UTS), reaching a minimum value of 43% within the temperature range spanning from 50 to 300 °C. In contrast, the inclusion of boron carbide (B 4 C) and graphite (Gr) particles consistently improved the ultimate tensile strength (UTS) of Al2618-HMMCs. It was seen that Sample S4(12 wt% B4C and 8 wt% Gr). exhibited a notably enhanced ultimate tensile strength (UTS) performance, displaying a 15.8% increase. The present composition has promise for use in applications requiring high temperatures.