Scholarlink

<p>GH4169 nickel-based superalloy is widely utilized in aerospace applications due to its exceptional high-temperature mechanical properties, superior thermal corrosion resistance, and excellent microstructural stability. To investigate the influence of annealing processes on microstructural evolution in nickel-based superalloys, this study conducted differential annealing treatments on cold-rolled GH4169 alloy specimens, systematically examining the effects of annealing temperature and duration on grain size evolution. Two distinct process routes were designed to simulate industrial continuous annealing and batch annealing operations. Comprehensive microstructural characterization was performed using optical microscopy (OM) and electron backscatter diffraction (EBSD) techniques, complemented by comparative analysis of recrystallization models during various annealing stages. Through computational evaluation of model prediction accuracy, an optimized model was selected to investigate grain growth behavior systematically. The experimental results demonstrate that batch annealing produced average grain sizes ranging from 25.1 to 43.2 μm under varying temperature-time conditions, while continuous annealing yielded grain sizes between 32.5 and 43.2 μm. Comparative analysis revealed that continuous annealing resulted in 12.5% larger average grain sizes than batch annealing. Furthermore, the modified Sellars model exhibited enhanced predictive capability with an R-value improvement of 0.0084 compared to the conventional Sellars model.</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

GH4169 Simulates the Degree of Recrystallization and Grain Growth Model of Different Annealing Processes

  • 期刊论文

  • 发表日期：

    2025年10月2日

查看全文
  • Shengxuan Zhao,
  • Zhicheng Cheng,
  • Wei Yu

摘要

GH4169 nickel-based superalloy is widely utilized in aerospace applications due to its exceptional high-temperature mechanical properties, superior thermal corrosion resistance, and excellent microstructural stability. To investigate the influence of annealing processes on microstructural evolution in nickel-based superalloys, this study conducted differential annealing treatments on cold-rolled GH4169 alloy specimens, systematically examining the effects of annealing temperature and duration on grain size evolution. Two distinct process routes were designed to simulate industrial continuous annealing and batch annealing operations. Comprehensive microstructural characterization was performed using optical microscopy (OM) and electron backscatter diffraction (EBSD) techniques, complemented by comparative analysis of recrystallization models during various annealing stages. Through computational evaluation of model prediction accuracy, an optimized model was selected to investigate grain growth behavior systematically. The experimental results demonstrate that batch annealing produced average grain sizes ranging from 25.1 to 43.2 μm under varying temperature-time conditions, while continuous annealing yielded grain sizes between 32.5 and 43.2 μm. Comparative analysis revealed that continuous annealing resulted in 12.5% larger average grain sizes than batch annealing. Furthermore, the modified Sellars model exhibited enhanced predictive capability with an R-value improvement of 0.0084 compared to the conventional Sellars model.