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<p>The precipitation and ripening behavior of AlN inclusions within the austenitic matrix during heat treatment of Fe–Mn–Al–C low-density steel were systematically investigated. An increase in nitrogen content led to a corresponding rise in the number density of AlN precipitates. The ripening kinetics, terminal inclusion size, and the role of nitrogen in modulating ripening dynamics were quantitatively assessed within the framework of Ostwald ripening theory. Notably, AlN inclusions formed during heat treatment exerted no discernible pinning effect on austenite grain boundaries.</p>

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Austenite Grain Boundary Precipitation and Growth Behavior of AlN Inclusions During Heat Treatment of Low-Density Steel: Ostwald Ripening

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Jinlong Wang,
  • Zhengliang Xue,
  • Shengqiang Song

摘要

The precipitation and ripening behavior of AlN inclusions within the austenitic matrix during heat treatment of Fe–Mn–Al–C low-density steel were systematically investigated. An increase in nitrogen content led to a corresponding rise in the number density of AlN precipitates. The ripening kinetics, terminal inclusion size, and the role of nitrogen in modulating ripening dynamics were quantitatively assessed within the framework of Ostwald ripening theory. Notably, AlN inclusions formed during heat treatment exerted no discernible pinning effect on austenite grain boundaries.