Scholarlink

<p>The wire arc additive manufacturing (WAAM) technology, by virtue of its unique processing flexibility, demonstrates remarkable applicability and advantages in the fabrication of complex magnesium alloy components. However, during the WAAM process, significant heat accumulation occurs, which leads to a coarse microstructure in the components, degrading their mechanical properties. In this study, an interlayer pause strategy was designed and applied to utilize the accumulated heat for tailoring the microstructure of the ZM5 (Mg–7.6Al–0.13Mn–0.63Zn, at.%) alloy. Six different interlayer dwelling times (0&#xa0;s, 30&#xa0;s, 60&#xa0;s, 90&#xa0;s, 120&#xa0;s, and 180&#xa0;s) were adopted. By precisely controlling the interlayer pause time, when it reaches 90&#xa0;s, a sample with refined grains and an appropriate second-phase volume fraction was produced. This sample demonstrated a remarkable strength–ductility synergy, achieving a yield strength of 160&#xa0;MPa, an ultimate tensile strength of 283&#xa0;MPa, and an elongation of 30%. Among them, grain boundary strengthening is the primary strengthening mechanism. This approach of regulating mechanical properties through in situ thermal management could similarly be extended to diverse material systems and advanced manufacturing processes.</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

Wire arc additively manufactured magnesium alloy via interlayer pause strategy

  • 期刊论文

  • 发表日期：

    2025年12月24日

查看全文
  • Kai Duan,
  • Chun Shang,
  • Xiangcheng Cui,
  • Yongzhe Wang,
  • Weiqi Wang,
  • Yunzhuo Lu

摘要

The wire arc additive manufacturing (WAAM) technology, by virtue of its unique processing flexibility, demonstrates remarkable applicability and advantages in the fabrication of complex magnesium alloy components. However, during the WAAM process, significant heat accumulation occurs, which leads to a coarse microstructure in the components, degrading their mechanical properties. In this study, an interlayer pause strategy was designed and applied to utilize the accumulated heat for tailoring the microstructure of the ZM5 (Mg–7.6Al–0.13Mn–0.63Zn, at.%) alloy. Six different interlayer dwelling times (0 s, 30 s, 60 s, 90 s, 120 s, and 180 s) were adopted. By precisely controlling the interlayer pause time, when it reaches 90 s, a sample with refined grains and an appropriate second-phase volume fraction was produced. This sample demonstrated a remarkable strength–ductility synergy, achieving a yield strength of 160 MPa, an ultimate tensile strength of 283 MPa, and an elongation of 30%. Among them, grain boundary strengthening is the primary strengthening mechanism. This approach of regulating mechanical properties through in situ thermal management could similarly be extended to diverse material systems and advanced manufacturing processes.