Vibration Behavior of AA5083 – Aluminosilicate sub-µ Composite at Different Temperature Condition

In the present work, AA 5083 base material was reinforced with sub-µ aluminosilicate (Al₂SiO₅) particle for four different compositions using the semi-solid-state compo-casting method. The surface morphology of the developed base and sub-µ composite materials was analysed using SEM, FE-SEM, EDS and X-RD analysis. The base material micro-hardness value was higher than the sub-µ composite materials. Corresponding, vibrational behaviour was tested at different temperature conditions such as 35 °C, 50 °C, 65 °C and 80 °C. The sub-µ composite materials show a higher natural frequency value than base material even after being exposed to higher temperatures. When the material was exposed to 80 °C, the surface morphology image showed that the developed materials had improper grain boundaries, interfacial bonding and phase transformation. This results in a decrease or shift of natural frequency value at higher temperatures than at room temperature. The natural frequency value of base material is lower than sub-µ composites at all temperature conditions. Thus, the presence of Al₂SiO₅ particle in the base material (AA 5083) improves the vibrational behaviour of the sub-µ composites without affecting the mechanical behaviour at different temperature conditions. Adding 1.5 wt% Al₂SiO₅ particles to the base material shows a better vibration behaviour at 80 °C. The mechanism that influenced the shifting of natural frequency is studied.