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7219 |
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Synthesis of FeCrNiAl high entropy alloy using radio frequency inductively coupled plasma and arc-melting methods: A comparison study of microstructure, and structural properties |
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Morteza Javid* / University of Toronto, Canada Wandong Wang / University of Toronto/ Department of Materials Science and Engineering, Canada Seyyed Morteza Javid/ University of Toronto/Department of Mechanical and Industrial Engineering, Canada Sina Alavi/ University of Toronto/Department of Mechanical and Industrial Engineering, Canada Javad Mostaghimi/ University of Toronto/Department of Mechanical and Industrial Engineering, Canada Yu Zou / University of Toronto/ Department of Materials Science and Engineering, Canada |
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In this study, we synthesized FeCrNiAl high entropy alloy using both radio frequency inductively coupled plasma and arc-melting methods. Microstructure and structural properties were determined and compared using a backscattered electron scanning electron microscope (SEM-BSE) and Vickers hardness test. To compare the microstructural difference of FeCrNiAl equimolar, samples were synthesized with the same nominal composition. Two samples show the dendritic microstructure from the SEM-BSE images, which is typical morphology for as-cast high-entropy alloys. The high-resolution images reveal that the grain size along the grain boundary is relatively large, gradually changing to a small value towards the grain interior. Due to the difference in cooling rate, the sample prepared by RF-ICP shows finer microstructure. The Vickers hardness tester was applied to figure out the mechanical properties of samples. Considering the microstructural difference, the sample prepared by RF-ICP exhibits a higher hardness value compared to the arc-melting counterpart. |