Abstract
The objective of the present study was to investigate the impact of mechanical vibration on the microstructure and mechanical properties of AlSi5Cu3 alloy. To achieve this, a custom vibrating setup was developed in-house to apply mechanical vibrations to the aluminum alloy. The vibrations were applied at a fixed frequency of 30 Hz, with varying vibrational amplitudes of 10, 15, and 20 μm, and different vibration times of 1, 1:30, and 2 min. The analysis of the conventional cast sample revealed a coarse dendritic structure with an average grain count of 2316 grains/mm2. This sample exhibited the lowest hardness and ultimate tensile strength measuring 38.25 HRB and 172 MPa, respectively. However, as the vibrational amplitude and time increased, significant improvements were observed in grain refinement and mechanical properties. The maximum grain refinement was achieved at a vibrational amplitude of 20 μm and a vibration time of 2 min. Under these conditions, the number of grains per unit area increased to 3785 grains/mm2, representing a 63% increment. Additionally, the coarse dendritic structure transformed into an equiaxed grain structure. The maximum percentage increment of hardness, ultimate tensile strength, and yield strength is 19, 16, and 16% for 20 μm of vibrational amplitude and vibration time of 2 min as compared to the conventional cast sample. The hardness, ultimate tensile strength and yield strength are 45.39 HRB, 199 MPa and 141 MPa, respectively. These findings highlight the positive influence of mechanical vibration on the microstructure and mechanical properties of AlSi5Cu3 alloy.
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The authors gratefully acknowledge the support from Department of Science and Technology (DST), New Delhi, sponsored SMART Foundry Project (DST/TSG/ AMT/2015/332 dated 17/08/2016).
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Ayar, V.S., Gajjar, D.J. & Sutaria, M.P. Effect of Mechanical Vibration on Microstructure and Mechanical Properties of AlSi5Cu3 Alloy. Inter Metalcast (2023). https://doi.org/10.1007/s40962-023-01179-3
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DOI: https://doi.org/10.1007/s40962-023-01179-3