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"On the development of pseudo-eutectic AlCoCrFeNi sub 2.1 /sub high en" by Bosheng Dong, Zhiyang Wang et al.

Abstract
A new Powder-bed Arc Additive Manufacturing (PAAM) processing which includes on-line remelting of deposited material has been developed for the manufacturing of high entropy alloys (HEAs) based on an existing AlCoCrFeNi pseudo-eutectic system. The remelting process is typically applied in the arc melting process to improve the homogeneity of prepared material. We investigated the microstructure and mechanical properties of produced AlCoCrFeNi HEA after applying a remelting process (1, 3, and 6 times) on each deposited layer. The results show the formation of the pseudo-eutectic microstructure, which consists of relatively large columnar grains of the dominant FCC phase (~90 wt%) and fine dendritic grains of the minor BCC phase (~10 wt%). The applied layer-remelting process shows negligible effects on the phase fractions and their compositions, however, it significantly degraded the tensile strength and ductility of prepared alloys. Particularly, the ductility of the ....

Powder Bed Arc Additive Manufacturing , Additive Manufacturing , Lcocrfeni 2 1 , High Entropy Alloys , Mechanical Properties ,

DW Tomorrow Today November 1, 2019 08:45:00

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DW Tomorrow Today October 28, 2019 04:45:00

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