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KMID : 0381920150450010009
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Korean Journal of Microscopy
2015 Volume.45 No. 1 p.9 ~ p.15
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Microstructural Evolution in CuCrFeNi, CuCrFeNiMn, and CuCrFeNiMnAl High Entropy Alloys
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Hyun Jae-Ik
Kong Kyeong-Ho
Kim Kang-Cheol
Kim Won-Tae
Kim Do-Hyang
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Abstract
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In the present study, microstructural evolution in CuCrFeNi, CuCrFeNiMn, and CuCrFeNiMnAl alloys has been investigated. The as-cast CuCrFeNi alloy consists of a single fcc phase with the lattice parameter of 0.358 nm, while the as-cast CuCrFeNiMn alloy consists of (bcc+fcc1+fcc2) phases with lattice parameters of 0.287 nm, 0.366 nm, and 0.361 nm. The heat treatment of the cast CuCrFeNiMn alloy results in the different type of microstructure depending on the heat treatment temperature. At 900℃ a new thermodynamically stable phase appears instead of the bcc solid solution phase, while at 1,000℃, the heat treated microstructure is almost same as that in the as-cast state. The addition of Al in CuCrFeNiMn alloy changes the constituent phases from (fcc1+fcc2+bcc) to (bcc1+bcc2).
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KEYWORD
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High entropy alloy, CuCrFeNi alloy, fcc solid solution, bcc solid solution, Heat treatment
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