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Simultaneous control of solidus and liquidus lines in alloy solidification

机译：合金凝固中固相线和液相线的同时控制

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摘要

A methodology based on inverse analysis techniques is presented for simultaneous control of solidus and liquidus lines, and hence the mushy zone thickness, in the directional solidification of alloy materials. In order to minimize the risk of freckle formation in the casting process, specific distributions of heat fluxes on the boundaries of the model are predicted that result in a narrow mushy zone. To this end, the heat fluxes should be so evaluated that the positions of the solidus and liquidus lines can be controlled simultaneously. The numerical formulation of the solidification process is carried out by a previously established truly meshless technique. The accuracy and effectiveness of the proposed method are verified through some 2D numerical examples. The numerical examples assess the great potential of the proposed method in confining the mushy zone to a narrow part of the domain.
机译：提出了一种基于逆分析技术的方法，用于在合金材料的定向凝固过程中同时控制固相线和液相线，以及糊状区域的厚度。为了最大程度地减少铸造过程中出现雀斑的风险，预测了模型边界上热流的特定分布，从而导致了狭窄的糊状区域。为此，应该对热通量进行评估，以便可以同时控制固相线和液相线的位置。固化过程的数值公式是通过先前建立的真正无网格技术进行的。通过二维数值算例验证了该方法的准确性和有效性。数值算例评估了所提出方法将糊状区域限制在域的狭窄部分中的巨大潜力。

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