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<p>In this work, the laser coaxial wire additive manufacturing (LCWAM) technique was employed to fabricate thin-walled plates using Al-Mg aluminum alloy wires. The microstructural characteristics and mechanical properties of the as-deposited samples were systematically investigated. The microstructure of the thin-walled plates deposited by LCWAM chiefly comprised fine columnar grains (average width of &lt; 50&#xa0;μm) in good orientation with a weak texture. The tensile properties of the as-deposited samples were stable and nearly isotropic with an ultimate strength of &gt; 250&#xa0;MPa and an elongation of &gt; 27%. The tensile samples exhibited ductile fracture characteristics with no visible defects on the fractured surface. The porosity of the LCWAM samples under industrial computed tomography was about 0.001%, which was significantly lower than those of other additive manufacturing samples prepared using similar aluminum alloys, demonstrating the great potential of LCWAM in producing high-quality Al alloys.</p>

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Evaluation of the Microstructure and Mechanical Properties of Al-Mg Aluminum Alloys Fabricated by Laser Coaxial Wire Additive Manufacturing

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • Qing Zhu,
  • Dinghui Liu,
  • Yunjie Xie,
  • Yudai Wang,
  • Haibo Tang,
  • Xu Cheng,
  • Lutong Zhang,
  • Rui Xu

摘要

In this work, the laser coaxial wire additive manufacturing (LCWAM) technique was employed to fabricate thin-walled plates using Al-Mg aluminum alloy wires. The microstructural characteristics and mechanical properties of the as-deposited samples were systematically investigated. The microstructure of the thin-walled plates deposited by LCWAM chiefly comprised fine columnar grains (average width of < 50 μm) in good orientation with a weak texture. The tensile properties of the as-deposited samples were stable and nearly isotropic with an ultimate strength of > 250 MPa and an elongation of > 27%. The tensile samples exhibited ductile fracture characteristics with no visible defects on the fractured surface. The porosity of the LCWAM samples under industrial computed tomography was about 0.001%, which was significantly lower than those of other additive manufacturing samples prepared using similar aluminum alloys, demonstrating the great potential of LCWAM in producing high-quality Al alloys.