Grain Refinement and Modification of Al-Cu Alloys with Yttrium
摘要
The refinement and modification of Al-Cu alloys can result in the change of solidification process,e.g.the nucleation temperature,eutectic arrest,solidification range and cooling rate.Specially,the refinement and modification of Al-Cu alloy can be achieved by addition of rare earth.In this paper,the effect of yttrium on the microstructure and solidification process of Al-Cu alloys was investigated by the method of thermal analysis.Meanwhile,the microstructure of Al-Cu alloy was observed by OM and SEM.The results show that θ(Al2Cu) phases change from mesh structure into fish-bone shape.Analysis indicates that yttrium causes a depression of solid-liquid coexistence zone and the disappearance of recalescence of the eutectic arrest.
引用本文（GB/T 7714）
Min Li. Grain Refinement and Modification of Al-Cu Alloys with Yttrium[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2009.
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