Comparative study of microstructure and mechanical properties of thermo-mechanically processed Al(0.2, 0.5) CoCrFeNiMo0.5 high-entropy alloys

Y Palguna, R Korla - Philosophical Magazine Letters, 2023 - Taylor & Francis
Philosophical Magazine Letters, 2023Taylor & Francis
The main objective of the present work is to produce AlxCoCrFeNiMo0. 5 alloy through a
wrought process. AlxCoCrFeNiMo0. 5 high-entropy alloys with two different Al contents (x=
0.2 and 0.5) were prepared by vacuum arc melting followed by thermo-mechanical
processing. Microstructural evolution was investigated after hot forging and subsequent
homogenisation using XRD, SEM, and TEM. The final microstructure corresponding to Al0. 2
and Al0. 5 are BCT (sigma) in the FCC matrix and BCT (sigma) and ordered BCC together in …
Abstract
The main objective of the present work is to produce AlxCoCrFeNiMo0.5 alloy through a wrought process. AlxCoCrFeNiMo0.5 high-entropy alloys with two different Al contents (x = 0.2 and 0.5) were prepared by vacuum arc melting followed by thermo-mechanical processing. Microstructural evolution was investigated after hot forging and subsequent homogenisation using XRD, SEM, and TEM. The final microstructure corresponding to Al0.2 and Al0.5 are BCT (sigma) in the FCC matrix and BCT (sigma) and ordered BCC together in the FCC matrix respectively. Room-temperature mechanical properties were investigated using uniaxial compression and hardness measurements. There is an apparent increase in strength and a decrease in ductility for the Al0.5 alloy. However, a higher ductility was observed in Al0.2 alloy with a compromised reduction in strength.
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