HIGH-TEMPERATURE CASTABLE ALUMINUM-ALLOYS WITH IRON

A structure-concept approach is used to substantiate conceptually the feasibility of producing relatively inexpensive iron-rich high-tempera ture castable aluminum alloys. Al-Fe-Ce-Zr-Cr and Al-Fe-Ni-Zr-Cr compo sitions are proposed as holding large promise, their structure after h eat treatment representing a combination of a high-temperature Fe-cont aining phase of eutectic origin and a high-temperature aluminum matrix alloyed with zirconium and chromium. These alloys possess a high leve l of high-temperature strength, mechanical and casting properties, the y compare well with, and excel in some properties, the widespread ATsR lu and AL33 high- temperature alloys.