Scholarlink

<p>In this study, the effect of the rare earth cerium (Ce) element on the microstructure and high-temperature mechanical properties of aged Al-Cu-Mn alloy is investigated via optical microscopy, scanning electron microscopy, energy-dispersive spectrometry, and transmission electron microscopy. The results demonstrate that the addition of Ce significantly refines the grain size and enhances the tensile strength. At room temperature, the tensile strength of the alloy initially increases and then decreases with increasing Ce content. At the 0.1 wt.% Ce content, the maximum tensile strength reaches 453.9&#xa0;MPa. At 300 and 350&#xa0;°C, the high-temperature tensile strength of the alloy increases initially and then decreases with increasing Ce content. The maximum tensile strength is observed at the 0.3 wt.% Ce content, reaching 161.4&#xa0;MPa at 300&#xa0;°C and 116.3&#xa0;MPa at 350&#xa0;°C. Moreover, Ce primarily exists in the form of the Al<sub>8</sub>CeCu<sub>4</sub> phase, which promotes the ductile-to-brittle fracture mode transition at high temperatures.</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 Ce on Microstructure and Mechanical Properties of Al-Cu-Mn Alloys

  • 期刊论文

  • 发表日期：

    2025年7月2日

查看全文
  • Weidong Chen,
  • Zhu Chen,
  • Ruofei Zhu,
  • Xinrong Li,
  • Shufang Yan,
  • Yi Sui,
  • Yinhui Qu

摘要

In this study, the effect of the rare earth cerium (Ce) element on the microstructure and high-temperature mechanical properties of aged Al-Cu-Mn alloy is investigated via optical microscopy, scanning electron microscopy, energy-dispersive spectrometry, and transmission electron microscopy. The results demonstrate that the addition of Ce significantly refines the grain size and enhances the tensile strength. At room temperature, the tensile strength of the alloy initially increases and then decreases with increasing Ce content. At the 0.1 wt.% Ce content, the maximum tensile strength reaches 453.9 MPa. At 300 and 350 °C, the high-temperature tensile strength of the alloy increases initially and then decreases with increasing Ce content. The maximum tensile strength is observed at the 0.3 wt.% Ce content, reaching 161.4 MPa at 300 °C and 116.3 MPa at 350 °C. Moreover, Ce primarily exists in the form of the Al8CeCu4 phase, which promotes the ductile-to-brittle fracture mode transition at high temperatures.