Kim, YC Kim, DH Kim, WT Han, YS Lee, HI 2024-01-21T12:46:05Z 2024-01-21T12:46:05Z 2021-09-05 2001-02 0267-0836 https://pubs.kist.re.kr/handle/201004/140759 The effect of silver addition on the formation of secondary phases in squeeze cast Al-4.0Cu-1.5Mg and Al-4.0Cu-1.5Mg-0.7Ag (an wt-%) alloys has been investigated using optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffractometry, and transmission electron microscopy. The as cast microstructure of both alloys consists of primary dendritic alpha -Al and various types of secondary solidification phase, e.g. Al2Cu, Al2CuMg, Al(Cu,Ag)Mg, and icosahedral (I) and decagonal (D) quasicrystalline phases. However, the solidification path in the interdendritic region during squeeze casting is different for each alloy, i.e. L-->ternary alpha -Al-Al2Cu-Al2CuMg eutectic in Al-4.0Cu-1.5Mg and L-->L' Al2Cu-->alpha -Al-Al2Cu-Al(Cu0.75Ag0.25) Mg eutectic in Al-4.0Cu-1.5Mg-0.7Ag. This indicates that silver acts as an alloying element stabilising the formation of Al(Cu,Ag)Mg Laves phase. The remaining copper and iron rich liquid in the interdendritic region at the final stage of solidification solidifies into a mixed structure of alpha -Al, Al2Cu, and AlCuFe I (or D) phases. The composition of the I and D phases, measured by energy dispersive X-ray spectroscopy, is in the range Al-(27 similar to 28)Cu-(9 similar to 10)Fe and Al-(26 similar to 27)Cu-(7 similar to9)Fe (all at.-%) respectively. English I O M COMMUNICATIONS LTD INST MATERIALS MG-AG ALLOYS OMEGA-PHASE QUASI-CRYSTALS DIFFRACTION PRECIPITATE STABILITY STRAIN Effect of sliver addition on formation of secondary phases in squeeze cast Al-Cu-Mgalloys Article 10.1179/026708301101509881 1 MATERIALS SCIENCE AND TECHNOLOGY, v.17, no.2, pp.215 - 222 MATERIALS SCIENCE AND TECHNOLOGY 17 2 215 222 scie scopus 000167456400016 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article MG-AG ALLOYS OMEGA-PHASE QUASI-CRYSTALS DIFFRACTION PRECIPITATE STABILITY STRAIN squeeze casting Al-Cu-Mg alloy Silver alloying Microstructure