Castability of aluminium alloys
Castability of aluminium alloys
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DOI：
10.1007/s12666-009-0049-2
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发表时间：
2009-10-01
影响因子：
1.6
通讯作者：
Arnberg, Lars
中科院分区：
文献类型：
--
作者：
Di Sabatino, Marisa;Arnberg, Lars
可铸性是指合金在铸造时不形成裂纹、偏析、气孔或浇不足等缺陷的能力。决定可铸性的合金相关现象是流动性、宏观偏析、热裂和气孔。这些现象已经知道了很长一段时间，但只是最近才得到很好的理解，并正在进行工作，以开发预测可铸性模型。这些模型需要输入的物理性质，如凝固路径，枝晶相干性，凝固收缩和枝晶间的渗透性。其中一些属性很难通过实验确定，但正在开发新的实验技术来提取此类数据。本文将综述限制铝合金铸造性能的现象。介绍了合金成分对流动性、宏观偏析、热裂和孔隙率的影响。模型的可铸性预测将简要审查和数据的一致性，流动性，渗透性和收缩将提交。
Castability is the ability of an alloy to be cast without formation of defects such as cracks, segregations, pores or misruns. Alloy dependent phenomena that determine castability are fluidity, macrosegregation, hot tearing and porosity. These phenomena have been known for a long time but have only recently become well understood and work is underway to develop predictive castability models. These models require input of physical properties, such as solidification path, dendrite coherency, solidification shrinkage and interdendritic permeability. Some of these properties are difficult to determine experimentally but new experimental techniques are being developed to extract such data. This paper will review the phenomena that limit castability of aluminium alloys. The influence of alloy composition on fluidity, macrosegregation, hot tearing and porosity will be described. Models for castability prediction will be briefly reviewed and data on coherency, fluidity, permeability and shrinkage will be presented.