Developing advanced materials with excellent mechanical properties and high-temperature oxidation performance are important to the potential application in high-temperature structural parts. In the paper, CoCrNiAlxY (x = 0.2, 0.6, 1.0 and 1.4) middle entropy alloys were prepared, and the effects of Al content on the microstructure, mechanical properties and oxidation behavior at 1200 degrees C of CoCrNiAlxY middle entropy alloys were studied. The phase of CoCrNiAlxY alloys is changing from FCC to BCC with increasing Al content; thereinto, CoCrNiAl0.6Y alloy forms duplex FCC plus BCC phase stru...
