The appearance of macroscopic segregation in ZL205A alloy castings bears a super resemblance to theappearance of shrinkage porosity, and the chemical composition of the segregation is Al2Cu whose microstructure isin t...The appearance of macroscopic segregation in ZL205A alloy castings bears a super resemblance to theappearance of shrinkage porosity, and the chemical composition of the segregation is Al2Cu whose microstructure isin the form of dentrite or skeleton crystal. According to the characteristic of nebulous segregation, the formationprocess could be divided into two steps by the eutectic temperature of Al2Cu. Then a criterion for each of the twosteps is brought forward on the basis of the shrinkage porosity criterion of low pressure casting.展开更多
文摘The appearance of macroscopic segregation in ZL205A alloy castings bears a super resemblance to theappearance of shrinkage porosity, and the chemical composition of the segregation is Al2Cu whose microstructure isin the form of dentrite or skeleton crystal. According to the characteristic of nebulous segregation, the formationprocess could be divided into two steps by the eutectic temperature of Al2Cu. Then a criterion for each of the twosteps is brought forward on the basis of the shrinkage porosity criterion of low pressure casting.
