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<p>This study employed solid-phase synthesis to fabricate three distinct materials: extruded AZ31 magnesium alloy, 2% short carbon fiber-reinforced magnesium matrix composite (designated as C<sub>sf</sub>/Mg composite), and hybrid 1% silicon carbide/2% carbon fiber-reinforced AZ31 magnesium matrix composite (designated as SiC/C<sub>sf</sub> /Mg composite), respectively. Experimental methods such as scanning electron microscopy (SEM) and dynamic mechanical stretching were utilized to investigate the effects of 700&#xa0;s<sup>−1</sup> on the dynamic mechanical properties, fracture microscopic morphology, and interfacial bonding strength of the three composites mentioned above and the impact of different high strain rates on the dynamic mechanical properties of C<sub>sf</sub>/Mg composites. The experimental results show that the C<sub>sf</sub>/Mg composite has the best dynamic mechanical properties at a strain rate of 700&#xa0;s<sup>−1</sup>, with a tensile strength value of 363&#xa0;MPa, an 11% increase in tensile strength compared to AZ31 magnesium alloy. With the increase of strain rate, the tensile strength of C<sub>sf</sub>/Mg composites showed a trend of increasing and then decreasing, in which the dynamic mechanical properties of C<sub>sf</sub>/Mg composites were the best with a tensile strength of 370&#xa0;MPa at a strain rate of 1400&#xa0;s<sup>−1</sup>. The findings of this paper can provide a certain theoretical basis and material optimization basis for the analysis of dynamic mechanical impact properties of magnesium matrix composites to meet engineering requirements.</p>

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Dynamic Mechanical Properties of Short Carbon Fiber Reinforced Magnesium Matrix Composites at Different High Strain Rates

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • You Bin Wang,
  • Qing Shuai Gao,
  • Bo Shi Jiang,
  • Kai Han Zhou,
  • Ning Wang,
  • Xian Long Wu,
  • Zhe Wu

摘要

This study employed solid-phase synthesis to fabricate three distinct materials: extruded AZ31 magnesium alloy, 2% short carbon fiber-reinforced magnesium matrix composite (designated as Csf/Mg composite), and hybrid 1% silicon carbide/2% carbon fiber-reinforced AZ31 magnesium matrix composite (designated as SiC/Csf /Mg composite), respectively. Experimental methods such as scanning electron microscopy (SEM) and dynamic mechanical stretching were utilized to investigate the effects of 700 s−1 on the dynamic mechanical properties, fracture microscopic morphology, and interfacial bonding strength of the three composites mentioned above and the impact of different high strain rates on the dynamic mechanical properties of Csf/Mg composites. The experimental results show that the Csf/Mg composite has the best dynamic mechanical properties at a strain rate of 700 s−1, with a tensile strength value of 363 MPa, an 11% increase in tensile strength compared to AZ31 magnesium alloy. With the increase of strain rate, the tensile strength of Csf/Mg composites showed a trend of increasing and then decreasing, in which the dynamic mechanical properties of Csf/Mg composites were the best with a tensile strength of 370 MPa at a strain rate of 1400 s−1. The findings of this paper can provide a certain theoretical basis and material optimization basis for the analysis of dynamic mechanical impact properties of magnesium matrix composites to meet engineering requirements.