Anyone has the idea for the phase formation with the elements: Al, Fe, Mg and O? The composition is around Al-45%Mg-2%Fe, most O is from the casting process. Thanks.
Thanks for your information. Actually, we found the needle Al3Fe (from SEM-EDS). However, there is always a island-like microstructure surrounding this needle phase. It is clear from OM but less clear in SEM-SEI mode and no obvious different in SEM-BEI mode.Please find more information in the attache images (island area - Spectrum 6):