Scholarlink

<p>This study investigated the effects of extrusion parameters on the microstructure evolution and fretting wear behavior of 1420 Al–Li alloy specimens. The results indicated that increasing the extrusion temperature enhances interfacial bonding and promoted continuous dynamic recrystallization (CDRX), while a higher extrusion ratio refined grains and facilitated the formation of equiaxed crystals. At 500&#xa0;°C/1:4, the alloy had a homogeneous microstructure with an average grain size of 31&#xa0;μm, along with grain refinement and reduced initial defects. After fretting wear, grains were further refined and elongated along the sliding direction, forming a composite structure characterized by both grain refinement and deformation. The refined grains induced by the high extrusion ratio accommodated surface deformation, thereby improving wear resistance. Under these parameters, the alloy showed better fretting wear resistance: the average friction coefficient dropped from 0.36 to 0.29, and the wear volume decreased by about 50% relative to the 1:2 specimen at the same temperature.</p> Graphical abstract <p></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

Fretting wear characteristics and microstructural evolution of 1420 Al–Li alloy extruded profiles

  • 期刊论文

  • 发表日期：

    2026年5月22日

查看全文
  • Yanzhong Xu,
  • Daosheng Wen,
  • Beibei Kong,
  • Yanxing Ding,
  • Hechao Lai,
  • Jia Wang,
  • Yuzheng Wang,
  • Zhen Gong,
  • Ziqiang Yin,
  • Shouren Wang

摘要

This study investigated the effects of extrusion parameters on the microstructure evolution and fretting wear behavior of 1420 Al–Li alloy specimens. The results indicated that increasing the extrusion temperature enhances interfacial bonding and promoted continuous dynamic recrystallization (CDRX), while a higher extrusion ratio refined grains and facilitated the formation of equiaxed crystals. At 500 °C/1:4, the alloy had a homogeneous microstructure with an average grain size of 31 μm, along with grain refinement and reduced initial defects. After fretting wear, grains were further refined and elongated along the sliding direction, forming a composite structure characterized by both grain refinement and deformation. The refined grains induced by the high extrusion ratio accommodated surface deformation, thereby improving wear resistance. Under these parameters, the alloy showed better fretting wear resistance: the average friction coefficient dropped from 0.36 to 0.29, and the wear volume decreased by about 50% relative to the 1:2 specimen at the same temperature.

Graphical abstract