Milling and Consolidation by Hot Rolling of Al-Fe-Cr Alloy
This paper discusses the preparation of partially amorphous Al90Fe5Cr5 and Al90Fe7Cr3 powder alloys by mechanical milling and their subsequent consolidation by hot milling. Samples milled for 60 hours showed a microstructure composed of amorphous phase and nanocrystalline Al. The heat treatment of these powders resulted in the equilibrium phases: fcc-Al + (Al3Fe and Al5Cr intermetallic phases). Hot rolling these powders at 430°C resulted in consolidated samples with a fine microstructure composed of Al, Al3Fe and Al5Cr intermetallic phases and high porosity. The high hardness values of about 417HV of the intermetallic compounds formed during the rolling process presented the main obstacle to obtaining totally homogenous and consolidated samples.
Lucio Salgado and Francisco Ambrozio Filho
C.A.D. Rodrigues et al., "Milling and Consolidation by Hot Rolling of Al-Fe-Cr Alloy", Materials Science Forum, Vols. 591-593, pp. 258-263, 2008