Evaluation of the Effect of Low-Frequency Vibration on the Mechanical Properties of Aluminium 6061 Alloy Under Varying Mould Sizes
Keywords:
Grain refining, low frequency vibration, mould size, Tensile strength, Impact strength.Abstract
This study examined the effects of mechanical vibration and mould size on the mechanical properties of cast aluminium 6061 alloys. Aluminium rods were cast into moulds of varying sizes (12mm to 21mm) with and without vibration at 44 Hz. Tensile and impact tests were conducted to evaluate the samples. Results showed that vibrated samples had improved tensile strength and toughness compared to non-vibrated (control) samples. The 19mm vibrated mould yielded the highest tensile strength (138.25 N/mm²), while the smallest mould (12mm) produced the toughest samples in impact tests. The application of vibration led to an average 12.8% improvement in tensile strength and 20.1% in impact toughness. Larger mould sizes were associated with decreased toughness, highlighting the positive impact of vibration and mould size optimization on material properties.
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