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<p>The effect of cooling rate variation on the microstructure and properties of Al–12Ce–2.5Mg alloy reinforced with Ni-graphite has been presented in this study. The composite melt prepared by stir mixing was cast in a preheated permanent step mold wherein the section size varied from 3.7 to 30&#xa0;mm. The distribution of graphite, primary and eutectic phases, hardness, and density has been studied as a function of section size and cooling rate. The volume percentages of intermetallic phases changed with an increase in section size, and the hardness decreased with an increase in section size, suggesting that other mechanical properties are a function of section size and cooling rate. The results were compared with those of the Al–12Ce base alloy cast using the same process to understand the effects of Ni-graphite additions on the microstructure and properties of Al–12Ce alloy in different sizes.</p>

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Effect of Section Size and Cooling Rate Variation in the Microstructure of Al–Ce–Ni–Graphite Composites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月23日

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  • Kaustubh Kishore Rane,
  • Swaroop Kumar Behera,
  • Mehran Zare,
  • Alec Thaddeus Buhler,
  • Luke Malone Wilson,
  • David Weiss,
  • Benjamin Church,
  • Pradeep Rohatgi

摘要

The effect of cooling rate variation on the microstructure and properties of Al–12Ce–2.5Mg alloy reinforced with Ni-graphite has been presented in this study. The composite melt prepared by stir mixing was cast in a preheated permanent step mold wherein the section size varied from 3.7 to 30 mm. The distribution of graphite, primary and eutectic phases, hardness, and density has been studied as a function of section size and cooling rate. The volume percentages of intermetallic phases changed with an increase in section size, and the hardness decreased with an increase in section size, suggesting that other mechanical properties are a function of section size and cooling rate. The results were compared with those of the Al–12Ce base alloy cast using the same process to understand the effects of Ni-graphite additions on the microstructure and properties of Al–12Ce alloy in different sizes.