Effect of multiple remelting on behaviour of AlSi5Cu3 Aluminium alloy

The present paper investigated the microstructural behaviour and mechanical properties of AlSi5Cu3 alloy after multiple remelting. The AlSi5Cu3 alloy is selected owing to excellent properties, better casting characteristics and numerous applications in diverse sectors. Total three remelting of AlSi5Cu3 alloy is performed and behaviour of alloy is evaluated for as casted and each remelted conditions. The microscopic study and grain size analysis revealed that the number of grains is gradually reduced after second and third remelting due to the presence of porosity and casting uncertainty. The results confirmed that the maximum values of mechanical properties were obtained in the first remelted condition whereas minimum values were detected in the third remelted condition. For the third remelted condition, the hardness is decreased by 8.33%, 11.11% and 2.78% whereas the ultimate tensile strength is reduced by 3.93%, 5.51% and 1.57% compared to as casted, first remelted and second remelted conditions respectively. The results evidenced that minor variation in microstructural behaviour and mechanical properties is observed after multiple remelting.Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Conference on Materials, Processing & Characterization.

Automated summary

This study investigated the microstructural behavior and mechanical properties of AlSi5Cu3 alloy after multiple remelting. The results showed that the number of grains decreased gradually after the 2nd and 3rd remelting, leading to variations in mechanical properties. The hardness and ultimate tensile strength were found to decrease after each remelting process, indicating a minor variation in the alloy's behavior.