The effect of Ni and V trace additions at various levels on the transition and distribution of Fe bearing intermetallic phases on AA 5657 was investigated with a direct chill casting simulator. Phase identification and quantification were performed using a combination of SEM, electron backscattered diffraction, energy dispersive spectrum and image analysis techniques to accurately evaluate the effect of Ni and V on ingot microstructures. The Ni addition promotes Al3Fe and α-AlFeSi while suppressing AlmFe. At high Ni levels, a new Ni rich AlFeNi phase was observed. On the other hand, V strongly encourages AlmFe and lowers the critical cooling rates of the phase formation. However, at low Ni or V levels (70–150 and 170–240 ppm respectively), the effect of Ni and V on phase selection is still weak and may not significantly affect the material properties. A counteractive effect of the combined Ni and V additions on the phase selection was observed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.