Scholarlink

<p>In this study, WS₂/ZrB₂ hybrid nanoparticles were successfully incorporated into AZ31 magnesium alloy to simultaneously improve strength and maintain ductility. The ZrB₂ micropowder was milled to produce nanopowder, then mixed with WS₂ nanoparticles through additional milling to form a hybrid reinforcement. The hybrid nanoparticles were introduced into the molten AZ31 matrix via stir casting, and nanocomposites with various reinforcement contents were fabricated. Optical microscopy (OM) and scanning electron microscopy (SEM) revealed a relatively uniform distribution of the reinforcing particles, significant grain refinement, with the average grain size decreasing from 46&#xa0;µm in the unreinforced alloy to 31&#xa0;µm in the nanocomposites, and notable modification of the Mg₁₇Al₁₂ intermetallic phase morphology. EDS and XRD analyses confirmed the presence of the hybrid reinforcements and the identified phases. Mechanical testing showed that the AZ31/1 vol.% ZrB₂ nanocomposite exhibited the highest Brinell hardness number (58 BHN), while the AZ31/0.5 vol.% WS₂–0.5 vol.% ZrB₂ hybrid nanocomposite achieved the highest tensile strength (239&#xa0;MPa), representing a 48.45% improvement compared with the base alloy while maintaining an elongation of 13.16%. Based on the calculated contributions of different strengthening mechanisms, the CTE mismatch between the matrix and reinforcements was identified as the dominant strengthening contribution.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of the effect of WS₂/ZrB₂ hybrid nanoparticles on the mechanical properties of the AZ31 magnesium alloy

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年8月1日

查看全文
  • Hossein Salehi Vaziri,
  • Mehran Razavi,
  • Seyed Salman Seyed Afqahi

摘要

In this study, WS₂/ZrB₂ hybrid nanoparticles were successfully incorporated into AZ31 magnesium alloy to simultaneously improve strength and maintain ductility. The ZrB₂ micropowder was milled to produce nanopowder, then mixed with WS₂ nanoparticles through additional milling to form a hybrid reinforcement. The hybrid nanoparticles were introduced into the molten AZ31 matrix via stir casting, and nanocomposites with various reinforcement contents were fabricated. Optical microscopy (OM) and scanning electron microscopy (SEM) revealed a relatively uniform distribution of the reinforcing particles, significant grain refinement, with the average grain size decreasing from 46 µm in the unreinforced alloy to 31 µm in the nanocomposites, and notable modification of the Mg₁₇Al₁₂ intermetallic phase morphology. EDS and XRD analyses confirmed the presence of the hybrid reinforcements and the identified phases. Mechanical testing showed that the AZ31/1 vol.% ZrB₂ nanocomposite exhibited the highest Brinell hardness number (58 BHN), while the AZ31/0.5 vol.% WS₂–0.5 vol.% ZrB₂ hybrid nanocomposite achieved the highest tensile strength (239 MPa), representing a 48.45% improvement compared with the base alloy while maintaining an elongation of 13.16%. Based on the calculated contributions of different strengthening mechanisms, the CTE mismatch between the matrix and reinforcements was identified as the dominant strengthening contribution.