Abstract
To have a further investigation of their physical properties such as electrical, magnetic, and thermal properties, the microstructure and mechanical property of Al x CoCrFeNi alloys have to have a detailed and systematic study. We present the effects of Al content on microstructure and mechanical property of as-cast, -homogenized, and -deformed Al x CoCrFeNi alloys in this study. It shows that single FCC and single BCC solutions, and duplex FCC-BCC are principal phases in these alloys. The x intervals for duplex FCC-BCC of different states of these alloys are investigated. The spinodal decomposition of less Al-Ni and more Al-Ni phases is the major reaction during homogenization of the alloys. The morphology of the less and more Al-Ni phases is also discussed. There is no stress-induced phase transformation during 50%-rolling deformation, and the main strengthening mechanism is work hardening. The hardening ability of FCC was about twice that of BCC in this alloy system. © 2009 Elsevier B.V. All rights reserved.