首页> 外文会议>International Conference on Solidification and Gravity; 20040906-09; Miskolc-Lillafured(HU) >Simple Analytical Models for Dendrite Arm Coarsening Under High and Medium Temperature Gradients
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Simple Analytical Models for Dendrite Arm Coarsening Under High and Medium Temperature Gradients

机译:高中温梯度下枝晶臂粗化的简单解析模型

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The coarsening of secondary dendrite arms is discussed in terms of two different driving forces, which are the curvature effect and the temperature gradient zone melting (TGZM) effect. It is shown that the driving force due the TGZM effect can be higher than that due to the curvature effect at high temperature gradients and equal to each other at medium temperature gradients. For such high and medium temperature gradients, simple analytical models are proposed to predict the coarsening kinetics of secondary arms during solidification in a binary alloy. The prediction of the present analytical model agrees with experimental data obtained from the solidification of Fe - 1.6 wt. % Mn - 0.75 wt. % C steel.
机译:根据两个不同的驱动力讨论了二次枝晶臂的粗化,这两个驱动力是曲率效应和温度梯度区熔化(TGZM)效应。结果表明,TGZM效应引起的驱动力可以高于高温梯度下的曲率效应,而中等温度梯度下的驱动力彼此相等。对于这样的高和中温度梯度,提出了简单的分析模型来预测二元合金凝固过程中次级臂的粗化动力学。本分析模型的预测与从Fe-1.6 wt。 Mn的%-0.75 wt。 %C钢。

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