Abstract
The microstructures, mechanical, corrosion, and wear behaviors of the TixZrNbTaMo (x = 0.5, 1, 1.5, and 2, molar ratio) high entropy alloys (HEAs) were studied. It was found that the Ti–Zr–Nb–Ta–Mo HEAs showed a dendrite structure with two body-centered-cubic (BCC) solid solution phases. The Ti0.5ZrNbTaMo HEA exhibited a high hardness of about 500 HV, high compressive strength approaching 2,600 MPa, and large plastic strain of over 30%. Furthermore, the highly-protective oxide films formed on the surface of Ti–Zr–Nb–Ta–Mo HEAs in the phosphate buffer saline (PBS) solution, which resulted in the high corrosion resistance of the HEAs. The Ti–Zr–Nb–Ta–Mo HEAs exhibited the greater dry- and wet-wear resistance than that of the traditional biomedical Ti6Al4V alloy. The results also indicated that with the decrease in the Ti content, the wear resistance of the Ti–Zr–Nb–Ta–Mo HEAs in the PBS solution improved. Finally, the Ti0.5ZrNbTaMo alloy presented the highest corrosive wear resistance among the four HEAs owing to its combination of good mechanical properties and high chemical stability.
Original language | English |
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Article number | 157997 |
Journal | Journal of Alloys and Compounds |
Volume | 861 |
DOIs | |
State | Published - Apr 25 2021 |
Externally published | Yes |
Funding
The present work was supported by the National Natural Science Foundation of China ( 21701024 ), the Natural Science Foundation of Fujian Province ( 2018J01629 ), the New Century Excellent Talents in University of Fujian Province (GY-Z17066), and the Scientific Research Project of Fujian University of Technology ( GY-Z17152) . P.K.L. very much appreciates the supports from (1) the National Science Foundation DMR-1611180 and 1809640 with program directors, Drs. J. Yang, G. Shiflet, and D. Farkas and (2) the US Army Research Office Project nos. W911NF-13–1-0438 and W911NF-19–2-0049 with program managers, Drs. M.P. Bakas, S.N. Mathaudhu, and D.M. Stepp.
Funders | Funder number |
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New Century Excellent Talents in University of Fujian Province | GY-Z17066 |
National Science Foundation | DMR-1611180, 1809640 |
Army Research Office | W911NF-13–1-0438, W911NF-19–2-0049 |
National Natural Science Foundation of China | 21701024 |
Natural Science Foundation of Fujian Province | 2018J01629 |
Fujian University of Technology | GY-Z17152 |
Keywords
- Corrosive wear
- High entropy alloys
- Mechanical properties
- Polarization
- Wear