Microstructure and mechanical performance of new Al0.5CrFe1.5MnNi0.5 high-entropy alloys improved by plasma nitriding |
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| Authors: | Wei-Yeh Tang |
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| Affiliation: | Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan |
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| Abstract: | Effects of plasma nitriding at 525 °C on microstructure and mechanical performance of a brand-new Al0.5CrFe1.5MnNi0.5 high-entropy alloy (HEA) were investigated. This alloy exhibits a large age hardening effect at temperatures from 600 to 800 °C and can be well-nitrided in the as-cast condition or the homogenized and furnace-cooled state. The nitrided layer has a thickness around 75 μm and a peak hardness level of Hv 1250 near the surface. The nitrided Al0.5CrFe1.5MnNi0.5 alloys exhibit superior adhesive wear resistance to conventional nitrided steels by 25-54 times due to their much thicker highly-hardened layer and higher peak hardness than that of conventional steels. |
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| Keywords: | High-entropy alloys Plasma nitriding ρ Phase Sliding wear |
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