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<p>In this research, an Al–Mg–Zn–Si alloy was developed from a secondary aluminium source. The aluminium was melted in a crucible; Mg, Zn, and Si were added, cast and age-hardened. The as-cast and the age-hardened alloys were characterized using XRF, XRD, and OPM. Additionally, the mechanical properties including hardness, tensile strength, impact strength, and percentage elongation of the age-hardened alloy were determined. Fractography of the fractured tensile strength samples was recorded using SEM. The results show that the presence of MgZn<sub>2</sub> and Mg<sub>2</sub>Si second phase particles increases the tensile strength, and impact strength to maximum strength at 6&#xa0;h ageing time. However, the hardness values and the percentage elongation showed an inverse relationship with ageing time. Lastly, the SEM fractography reveals dimples at 6&#xa0;h. This shows that aluminium from recycled beverage cans can be used to cast Al–Mg–Zn–Si alloy for automotive, aerospace, and aeronautic engineering applications.</p>

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Characterization, Mechanical Properties, and Fractographic Analysis of Al–Mg–Zn–Si Alloy from Secondary Aluminium

  • 期刊论文

  • 发表日期：

    2026年6月14日

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  • Auwal Abdulkadir Bala,
  • Sani Umar Mohammed,
  • Mahdi Makoyo,
  • Muazu Abubakar

摘要

In this research, an Al–Mg–Zn–Si alloy was developed from a secondary aluminium source. The aluminium was melted in a crucible; Mg, Zn, and Si were added, cast and age-hardened. The as-cast and the age-hardened alloys were characterized using XRF, XRD, and OPM. Additionally, the mechanical properties including hardness, tensile strength, impact strength, and percentage elongation of the age-hardened alloy were determined. Fractography of the fractured tensile strength samples was recorded using SEM. The results show that the presence of MgZn2 and Mg2Si second phase particles increases the tensile strength, and impact strength to maximum strength at 6 h ageing time. However, the hardness values and the percentage elongation showed an inverse relationship with ageing time. Lastly, the SEM fractography reveals dimples at 6 h. This shows that aluminium from recycled beverage cans can be used to cast Al–Mg–Zn–Si alloy for automotive, aerospace, and aeronautic engineering applications.