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Refining grain structure and porosity of an aluminium alloy with intensive melt shearing

机译:强化熔体剪切细化铝合金的晶粒结构和孔隙率

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摘要

Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of porosity. It can reduce the density index from 10.50% to 2.87% and the average size of porosity in the samples solidified under partial vacuum from around 1 mm to 100 ìm.
机译:使用双螺杆机在凝固前对铝合金进行强化熔体剪切。结果表明,强烈的熔体剪切具有明显的晶粒细化效果。另外,强烈的熔体剪切降低了体积分数和孔隙率的大小。它可以使密度指数从10.50%降低到2.87%,并且在部分真空下固化的样品中的平均孔隙率从1 mm降低到100ìm。

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