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预测二级臂间距基于树突尖的动力学和冷却速度
Ibrahim Sari1, Mahmoud Ahmadein2, Sabbah Ataya3
1Metallurgy Department, Montanuniversitaet of Leoben, Franz-Josef-Str. 18, A-8700 Leoben, Austria.
Materials (Basel, Switzerland)
|February 24, 2024
概括
一个新的模型使用尖端速度和冷却速率准确预测二级状石臂间距 (SDAS). 这一进步有助于理解凝固过程并改善材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 固化科学 固化科学
背景情况:
- 二次树突臂间距 (SDAS) 显著影响固化中的宏分离和机械性能.
- 准确预测SDAS对于造技术和微观结构进化建模至关重要.
研究的目的:
- 开发一种简单的预测模型,用于二级树突臂间距 (SDAS).
- 为了将SDAS与关键的固化参数相关联:尖端速度和冷却速度.
主要方法:
- 开发了一个数值模型,模拟一个在液体包裹中生长的圆柱体.
- 假设包括初始的圆柱半径等于树尖半径和一个固定的外半径.
- 该模型使用Pb-Sn合金在固定温度梯度下的实验数据进行了验证.
主要成果:
- 该模型与SDAS和树尖速度的实验测量结果非常一致.
- 在各种Pb-Sn合金组合中验证了预测.
结论:
- 提出的简单模型有效地根据尖端速度和冷却速率预测二级状石臂间距 (SDAS).
- 该模型可以集成到用于微观结构预测的体积平均模型中,从而影响柔性区域透性和宏观分离.
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