Effect of Aluminum Addition on Al_xCoFeMnNiZn Multi-Component Production

Abstract:

Five multi-component alloy (MCA) formulations of CoFeMnNiZn (MCA01), Al_0.5CoFeMnNiZn (MCA02), Al_1.0CoFeMnNiZn (MCA03), Co₅Fe₅Mn₃₀Ni₂₀Zn₄₀ (MCA04) and Al_8.4Co_4.6Fe_4.6Mn₂₇Ni_18.4Zn₃₇ (MCA05) were prepared by mechanical alloying and melting process (MAM). Five-component alloys of MCA01-MCA05 were designed using empirical formulae for high entropy alloys. Phase formation and microstructure were evaluated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that MCA01 was partially melted by MAM process. However, MCA02-MCA05 could be melted and cast by MAM process. The microstructures of as-cast MCA02 and MCA03 showed dendritic solidification. Nevertheless, the as-cast MCA04 showed microstructure similar to that of Ni-based superalloy, i.e., the as-cast MCA04 consisted of γ matrix and γ′ phase. Moreover, egg type core shell structure was found in the interdendritic regions of the MCA05 alloy. In addition, the Al-added MCA02 and MCA03 alloys showed crystal structures of FCC1, FCC2 and BCC. MCA04 alloy demonstrated crystal structure of FCC whereas MCA05 alloy had crystal structures of FCC and Primitive Cubic.

• Periodical: Key Engineering Materials (Volume 751)
• Pages: 53-59
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.751.53
• Online since: August 2017
• Authors: Amnart Suksamran, Nawarat Worauaychai*, Nattaya Tosangthum, Thanyaporn Yodkaew, Rungtip Krataitong, Pongsak Wila, Ruangdaj Tongsri
• Keywords: High Entropy Alloys, Mechanical Alloying and Melting Process (MAM), Multi-Component Alloys

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