Effect of Magnesium Variation on Microstructure and Mechanical Properties of Aluminum Recycled Alloys
DOI:
https://doi.org/10.32497/jrm.v20i3.6664Keywords:
aluminum, magnesium, mechanical properties, recyclingAbstract
The use of recycled aluminum (scrap) as a lightweight material in the automotive industry continues to grow,
especially through the addition of magnesium elements to improve mechanical properties. This study analyzes the
effect of adding magnesium of 5 Wt% and 10 Wt% on the mechanical properties and microstructure of aluminum
scrap melting results using the sand casting method at a temperature of 707°C. The test results show that the
addition of magnesium increases the hardness from 39.4 HV to 94.6 HV, and the tensile strength from 49.5 MPa to
181.5 MPa. Microstructural analysis shows the formation of more Mg phases in the aluminum matrix, resulting in a
stronger and more homogeneous structure. The addition of 10 Wt% magnesium gives the most optimal results,
proving that recycled aluminum has great potential to be used as a high-value engineering material through an
alloying process.
References
[1] M. M. Kamal et al., “Mechanical, micro-structural and emission study of recycled aluminum based hybrid composites,” Journal of Alloys and Metallurgical Systems, vol. 11, Sep. 2025, doi: 10.1016/j.jalmes.2025.100201.
[2] J. Gottmyers Melwyn, B. Chandragandhi, G. Sathiyaseelan, and P. Srinath, “Aluminium scrap recycling in a production furnace: Minimizing dross formation for sustainable and efficient recovery,” Mater Today Proc, May 2023, doi: 10.1016/j.matpr.2023.05.340.
[3] D. Baffari, G. Buffa, G. Ingarao, A. Masnata, and L. Fratini, “Aluminium sheet metal scrap recycling through friction consolidation,” in Procedia Manufacturing, Elsevier B.V., 2019, pp. 560–566. doi: 10.1016/j.promfg.2019.02.134.
[4] H. R. Jafarian, M. Sabzi, S. H. Mousavi Anijdan, A. R. Eivani, and N. Park, “The influence of austenitization temperature on microstructural developments, mechanical properties, fracture mode and wear mechanism of Hadfield high manganese steel,” Journal of Materials Research and Technology, vol. 10, pp. 819–831, Jan. 2021, doi: 10.1016/j.jmrt.2020.12.003.
[5] S. Bruschi, R. Bertolini, A. Ghiotti, H. Mahmood, and C. Zanella, “Manufacturing Letters Machinability of recycled aluminum alloys,” 2024. [Online]. Available: www.sciencedirect.com
[6] A. INTERNASIONAL, “Standard Practice for Preparation of Metallographic Specimens,” ASTM International, vol. 82, no. C, pp. 1–15, 2016.
[7] A. M. Sankhla et al., “Effect of mixing method and particle size on hardness and compressive strength of aluminium based metal matrix composite prepared through powder metallurgy route,” Journal of Materials Research and Technology, vol. 18, pp. 282–292, May 2022, doi: 10.1016/j.jmrt.2022.02.094.
[8] M. M. Ngouono et al., “Investigation of the manufacturing processes of recycled aluminum pots: A lean six sigma approach for sustainable and efficient production,” Cleaner Waste Systems, vol. 12, Dec. 2025, doi: 10.1016/j.clwas.2025.100432.
[9] D. Muliastri, D. Eka Septyani, and P. Lesmana, “Pengaruh Pelumas Terhadap Tegangan Alir Dan Gaya Penarikan Kawat Aisi 1006 Menggunakan Metode Fem,” Manutech : Jurnal Teknologi Manufaktur, vol. 13, no. 02, pp. 51–59, 2021, doi: 10.33504/manutech.v13i02.158.
[10] C. Gu, J. Lian, J. He, Z. Jiang, and Q. Jiang, “High corrosion-resistance nanocrystalline Ni coating on AZ91D magnesium alloy,” Surf Coat Technol, vol. 200, no. 18–19, pp. 5413–5418, 2006, doi: 10.1016/j.surfcoat.2005.07.001.
[11] A. Chen, C. Wang, J. Jiang, H. Ruan, and J. Lu, “Microstructure evolution and mechanical properties of austenite stainless steel with gradient twinned structure by surface mechanical attrition treatment,” Nanomaterials, vol. 11, no. 6, Jun. 2021, doi: 10.3390/nano11061624.
[12] D. Sugion, S. Mahardika, and dan Marjuki, “Study Pengaruh Penambahan Mg pada AL6061 Terhadap Sifat Mekanis, Hardness, dan Impack Aplikasi Baling-baling Perahu Ketek,” Jurnal Teknik Mesin, vol. 12, no. 2, p. 140, 2023.
[13] S. Dwi Yasvita, M. Rasid, and D. Arnoldi, “Dwi Arnoldi INNOVATIVE,” Journal Of Social Science Research, vol. 5, 2025.
[14] A. Indra Wardana, “PENGARUH PENAMBAHAN VARIASI MAGNESIUM (Mg) TERHADAP SIFAT MEKANIK CORAN ALUMUNIUM (Al) ALLOY DENGAN MENGGUNAKAN METODE CETAKAN PASIR,” pp. 2809–3410, 2021, [Online]. Available: https://talenta.usu.ac.id/dinamis
[15] R. Lin, B. Liu, J. Zhang, and S. Zhang, “Microstructure evolution and properties of 7075 aluminum alloy recycled from scrap aircraft aluminum alloys,” Journal of Materials Research and Technology, vol. 19, pp. 354–367, Jul. 2022, doi: 10.1016/j.jmrt.2022.05.011.
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