期刊
MATERIALS RESEARCH EXPRESS
卷 6, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/2053-1591/aaed63
关键词
high entropy alloys; mechanical alloying; spark plasma sintering; x-ray diffraction; corrosion
资金
- Technical Education Quality Improvement Programme-II (TEQIP-II)
In this study, the phase evolution and properties of CoCrCuFeNiSix (x = 0, 0.3, 0.6 and 0.9 atomic ratios) high entropy alloys prepared by powder metallurgy route is investigated. The x-ray diffraction analysis reveals the presence of mixed phases of the face-centered and body-centered cubic phase after 20 h of milling. The addition of Si (0.3, 0.6 and 0.9) favors the formation of the body-centered cubic structure during mechanical alloying. However, heating during spark plasma sintering encourages the transformation of the body-centered phases evolved after mechanical alloying to the face-centered and sigma phases. The microhardness value of CoCrCuFeNiSi0.9 high entropy alloy increased about 55% than the CoCrCuFeNi alloy. Furthermore, the enhancement in wear resistance from 0.230 km mm(-3) for CoCrCuFeNi to 0.933 km mm(-3) for CoCrCuFeNiSi0.9 alloys are observed with the Si addition. Additionally, corrosion resistance in potentiodynamic polarization measurement also enhanced with Si addition.
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