Scholarlink

<p>This study systematically investigates the effect of squeeze casting pressures (150&#xa0;MPa and 320&#xa0;MPa) on microstructures and mechanical properties of a Mg–9Al–2Si–0.5Ca–0.2Ce–0.2Mn alloy in both as-cast and peak-aged states. The results demonstrate that increasing squeeze casting pressures significantly refines as-cast microstructures, including α-Mg grains and intermetallic compounds (reducing the average α-Mg grain size from ~ 226 to ~ 52&#xa0;μm). Furthermore, the pressure-induced stacking faults accelerate subsequent aging kinetics and promotes the formation of finer, more densely distributed Mg<sub>17</sub>Al<sub>12</sub> precipitates in the peak-aged state. Consequently, the peak-aged alloy cast at 320&#xa0;MPa exhibits outstanding comprehensive mechanical properties, with a YS of 165&#xa0;MPa, a UTS of 296&#xa0;MPa and an EL of 11.6%, representing increments of 32%, 23%, and 45%, respectively (in comparison with gravity casting). This work provides a valuable reference for the design and fabrication of high-performance Mg alloys produced by squeeze casting.</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

Effect of squeeze casting pressure on microstructures and mechanical properties of a Mg–Al–Si alloy

  • 期刊论文

  • 发表日期：

    2026年2月23日

查看全文
  • Hai-Long Jia,
  • Jia-Yuan Ding,
  • Li-Wen Xue,
  • Ming Yang,
  • Pin-kui Ma,
  • Jia-Wang Song,
  • Min Zha

摘要

This study systematically investigates the effect of squeeze casting pressures (150 MPa and 320 MPa) on microstructures and mechanical properties of a Mg–9Al–2Si–0.5Ca–0.2Ce–0.2Mn alloy in both as-cast and peak-aged states. The results demonstrate that increasing squeeze casting pressures significantly refines as-cast microstructures, including α-Mg grains and intermetallic compounds (reducing the average α-Mg grain size from ~ 226 to ~ 52 μm). Furthermore, the pressure-induced stacking faults accelerate subsequent aging kinetics and promotes the formation of finer, more densely distributed Mg17Al12 precipitates in the peak-aged state. Consequently, the peak-aged alloy cast at 320 MPa exhibits outstanding comprehensive mechanical properties, with a YS of 165 MPa, a UTS of 296 MPa and an EL of 11.6%, representing increments of 32%, 23%, and 45%, respectively (in comparison with gravity casting). This work provides a valuable reference for the design and fabrication of high-performance Mg alloys produced by squeeze casting.