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<p>The magnesium alloy WE43, identified for its low density and high specific strength, has been strengthened with SiC, Al₂O₃ and B₄C compounds to improve its mechanical and machining performance. Hybrid composites were fabricated via stir casting, and their mechanical properties including hardness, tensile strength, and wear resistance were evaluated. Results indicate that the incorporation of ceramic reinforcements increased hardness of the material from 85 HV to 115 HV and tensile strength by 6 %. Wear tests result showed a significant reduction in wear from 0.031 g/min to 0.024 g/min for reinforced MMC compared to WE43 magnesium alloy. The corrosion rate has been significantly reduced by Sample 1 shows a reduction of almost 19 percent, while Sample 2 shows a reduction of around 37 percent compared to the unenriched WE43 alloy. SEM and EDS were used to study the microstructure and elemental composition of the WE43 magnesium metal matrix composite. Electrical discharge machining (EDM) trials were conducted using Brass, Copper, Tungsten-Copper electrodes and deionized water as a dielectric fluid. Copper and Tungsten-Copper electrodes provided higher material removal rates (MRR) and improved surface quality, whereas Brass electrodes experienced higher wear. Surface roughness analysis revealed that hybrid reinforcement contributed to smoother surfaces under optimized EDM parameters. These findings confirm that reinforcing WE43 magnesium alloy with SiC, Al₂O₃, and B₄C improves mechanical strength, wear resistance, and EDM machinability, highlighting the potential of these composites for aerospace and automotive structural applications.</p> Graphical Abstract <p></p>

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Enhancing Mechanical Properties of WE43 Magnesium Metal Matrix Composite Reinforced with Ceramic Materials and Optimizing EDM Process Parameters Through RA, GRA, and TOPSIS

  • 期刊论文

  • 发表日期：

    2025年12月2日

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  • Karthik S,
  • Sivakumar Annamalai,
  • Velmurugan G,
  • Jayaraman SS

摘要

The magnesium alloy WE43, identified for its low density and high specific strength, has been strengthened with SiC, Al₂O₃ and B₄C compounds to improve its mechanical and machining performance. Hybrid composites were fabricated via stir casting, and their mechanical properties including hardness, tensile strength, and wear resistance were evaluated. Results indicate that the incorporation of ceramic reinforcements increased hardness of the material from 85 HV to 115 HV and tensile strength by 6 %. Wear tests result showed a significant reduction in wear from 0.031 g/min to 0.024 g/min for reinforced MMC compared to WE43 magnesium alloy. The corrosion rate has been significantly reduced by Sample 1 shows a reduction of almost 19 percent, while Sample 2 shows a reduction of around 37 percent compared to the unenriched WE43 alloy. SEM and EDS were used to study the microstructure and elemental composition of the WE43 magnesium metal matrix composite. Electrical discharge machining (EDM) trials were conducted using Brass, Copper, Tungsten-Copper electrodes and deionized water as a dielectric fluid. Copper and Tungsten-Copper electrodes provided higher material removal rates (MRR) and improved surface quality, whereas Brass electrodes experienced higher wear. Surface roughness analysis revealed that hybrid reinforcement contributed to smoother surfaces under optimized EDM parameters. These findings confirm that reinforcing WE43 magnesium alloy with SiC, Al₂O₃, and B₄C improves mechanical strength, wear resistance, and EDM machinability, highlighting the potential of these composites for aerospace and automotive structural applications.

Graphical Abstract