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KMID : 0381920150450010032
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Korean Journal of Microscopy
2015 Volume.45 No. 1 p.32 ~ p.36
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Microstructural Features of Multicomponent FeCoCrNiSix Alloys
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Kong Kyeong-Ho
Kim Kang-Cheol
Kim Won-Tae
Kim Do-Hyang
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Abstract
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The microstructural features of FeCoCrNi, FeCoCrNiAl and FeCoCrNiSix (x=0, 5, 10, 15, 20) alloys have been investigated in the present study. The microstructure of FeCoCrNi alloy changes dramatically with equiatomic addition of Al. The fcc irregular shaped grain structure in the as-cast FeCoCrNi alloy changes into the bcc interconnected structure with phase separation of Al-Ni rich and Cr-Fe rich phases in the as-cast FeCoCrNiAl alloy. The microstructure of FeCoCrNi alloy changes with the addition of Si. With increasing the amount of Si, the fcc structure of the grains is maintained, but new phase containing higher amount of Si forms at the grain boundary. As the amount of Si increases, the fraction the Si-rich grain boundary phase increases.
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KEYWORD
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High entropy alloy, FeCoCrNi alloy, Solid solution, Si addition
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