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HomeKey Engineering MaterialsKey Engineering Materials Vol. 737Microstructural Evolution and Mechanical...

Microstructural Evolution and Mechanical Properties in a Mn_1.05Fe_1.05CoNiCu_0.9 High Entropy Alloy

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Abstract:

In the present study, the microstructural stability and mechanical properties of a MnFeCoNiCu alloy in which Cr was replaced by Cu from Cantor composition (CoCrFeMnNi) was studied. In the as-cast alloy, the dendrite arms are enriched with Cu and Mn and matrix between dendrite arms is enriched with Fe and Co. Ni was richer in the matrix, but also observed in the dendrite arms. Cu and Mn tend to segregate and solidify initially because the melting temperatures of Cu and Mn are lower than Fe and Co, resulting in the growth of Cu-Mn dendrite. After homogenization, the dendrites structure disappeared and grain boundaries are visible, indicating the segregated elements in the dendrite structure were homogenized. The presence of single phase FCC structure was confirmed after homogenization. The tensile strength of 1220 MPa with the ductility of 6 % was obtained in MnFeCoNiCu alloy.

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Periodical:

Key Engineering Materials (Volume 737)

Pages:

44-49

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.737.44

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Online since:

June 2017

Authors:

Seung Min Oh, Sun Ig Hong*

Keywords:

High Entropy Alloy, Mechanical Properties, Microstructure, MnFeCoNiCu

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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