Scholarlink

<p>The ODS GH4169 alloy powder was obtained by incorporating 1 wt.% Y<sub>2</sub>O<sub>3</sub> nanoparticles into GH4169 alloy powder using a resonant acoustic mixing technique. The ODS alloy was then fabricated via a selective laser melting process, and its microstructure and mechanical properties were studied. The nano-oxides formed in the ODS GH4169 alloy are predominantly Y–Al–O compounds, resulting from the high diffusion rate of Al atoms and the lower formation enthalpy of Y<sub>4</sub>Al<sub>2</sub>O<sub>9</sub>. The addition of Y<sub>2</sub>O<sub>3</sub> nanoparticles significantly refines the grain size of the GH4169 alloy, thereby enhancing both hardness and high-temperature mechanical properties. Compared to the GH4169 alloy, the tensile and yield strengths of the ODS GH4169 alloy at 650°C increase by 4.81% and 7.12%, respectively, while plasticity decreases by 26.08%. Dislocation strengthening is the primary strengthening mechanism contributing to the increase in yield strength, followed by second-phase strengthening and fine-grain strengthening.</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

Microstructure and mechanical properties of nano-Y2O3-strengthened GH4169 alloy fabricated through resonant acoustic mixing and selective laser melting

  • 期刊论文

  • 发表日期：

    2026年5月13日

查看全文
  • Shuting Zhang,
  • Yingjie Han,
  • Jin Huang,
  • Guohua Xu,
  • Lu Liu,
  • Bin Sun,
  • Peixuan Ouyang

摘要

The ODS GH4169 alloy powder was obtained by incorporating 1 wt.% Y2O3 nanoparticles into GH4169 alloy powder using a resonant acoustic mixing technique. The ODS alloy was then fabricated via a selective laser melting process, and its microstructure and mechanical properties were studied. The nano-oxides formed in the ODS GH4169 alloy are predominantly Y–Al–O compounds, resulting from the high diffusion rate of Al atoms and the lower formation enthalpy of Y4Al2O9. The addition of Y2O3 nanoparticles significantly refines the grain size of the GH4169 alloy, thereby enhancing both hardness and high-temperature mechanical properties. Compared to the GH4169 alloy, the tensile and yield strengths of the ODS GH4169 alloy at 650°C increase by 4.81% and 7.12%, respectively, while plasticity decreases by 26.08%. Dislocation strengthening is the primary strengthening mechanism contributing to the increase in yield strength, followed by second-phase strengthening and fine-grain strengthening.