Author(s)

Tian Dongxia ¹, Zhang Chao ¹

Affiliation(s)

¹ Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China

Corresponding Author

Zhang Chao

ABSTRACT

High-entropy alloys (HEAs) have attracted much attention for their promising mechanical properties. A new alloy system Ni₂FeCo_0.5Cr_0.5Ta_x (x = 0, 0.1, 0.3, 0.4, 0.6) with multi-principal elements was designed in this research. These HEAs were prepared by vacuum arc melting method. The crystal structure and microstructure of the HEAs were investigated by X-ray diffraction and scanning electron microscopy. The research results show that the Ni₂FeCo_0.5Cr_0.5 HEA was single-phase face-centered-cubic solid solution, whereas the Ta addition can lead to the formation of Laves phase. Typical cast dendrite and interdendrite structures were observed in the Ni₂FeCo_0.5Cr_0.5Ta_x HEAs. Vickers hardness and room-temperature compression tests were performed to investigate the effects of Ta adding on the mechanical properties of the new alloy system. The Vickers hardness and the yield strength increase with increasing Ta content.

KEYWORDS

High-entropy alloy; Microstructure; Mechanical properties

CITE THIS PAPER

Tian Dongxia, Zhang Chao, Microstructure and mechanical properties of Ni₂FeCo_0.5Cr_0.5Ta_x high-entropy alloys. Journal of Engineering Mechanics and Machinery (2022) Vol. 7: 68-72. DOI: http://dx.doi.org/10.23977/jemm.2022.070407.

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