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The effect of copper addition to a Al-Si + graphite alloy on the hardening and precipitates morphology during ageing, was investigated. The quasi - vortex - method was applied to cast the AlSiCu4 + graphite alloy. The alloy was homogenised at 530 degrees centigrade, quenched and aged at 160 and 200 degrees centigrade. The precipitation kinetics of Theta' - phase was studied using hardness, ultimate...
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