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Tribological and Corrosion Properties of Ni‐Cr‐Co‐Ti‐V Multi‐Principal Element Alloy Prepared by Vacuum Hot‐Pressing Sintering
Author(s) -
Wen Xin,
Cai Zhaobing,
Yin Bo,
Cui Xiufang,
Zhang Xuerun,
Jin Guo
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201801239
Subject(s) - materials science , alloy , metallurgy , corrosion , tribology , sintering , hot pressing , microstructure
In our work, an equiatomic Ni‐Cr‐Co‐Ti‐V multi‐principal element alloy is prepared by vacuum hot‐pressing sintering. The phase structure is investigated by Transmission electron microscopy (TEM) and properties of hardness, wear and corrosion resistance are studied. Furthermore, some reported high‐entropy alloys (HEAs) and conventional alloys are used as contrast for more intuitive evaluation of properties of Ni‐Cr‐Co‐Ti‐V HEA. The average micro‐hardness of this alloy reaches 1130 ± 15 HV. By nano‐indentation testing, the value of average Young's modulus and nano‐hardness are 318.6 ± 9 GPa and 17.21 ± 0.77 GPa, respectively. Compared with the room temperature, this alloy still keeps a good wear resistance at 600 °C and adhesive wear is the main wear mechanism. In the 3.5 wt% NaCl electrolyte, the passivating capacity of this alloy is significantly higher than that of 304 stainless steel and the corrosion rate of this alloy is relatively low, ≈0.035 mm/year. Thus, this alloy is expected to be applied in the severe interaction work environment of high temperature, wear, and corrosion.