1.5CrFeNi 1.5Ti 0.5 High-Entropy Alloy]]>

摘要

Α Co~(1.5)CrFeNi~(1.5)Ti~(0.5)high-entropy alloy (HEA) of the well-known family of CoCrFeNiTi has been designed using empirical parameters. The aim of this design was the production of a HEA with fcc structure that gives ductile behavior and also high strength because of the solid solution effect. The VEC calculations (8.1) supported the fcc structure while the δ factor calculations (4.97) not being out of the limit values, advised a significant lattice distortion. From the other hand, the Δ Η ~(mix)calculations (??9.64 kJ/mol) gave strong indications that no intermetallic would be formed. In order to investigate its potential application, the Co~(1.5)CrFeNi~(1.5)Ti~(0.5)HEA was prepared by vacuum arc melting and a primary assessment of its surface degradation response was conducted by means of sliding wear testing using different counterbody systems for a total sliding distance of 1000?m. An effort to correlate the alloy’s wear response with the microstructural characteristics was attempted. Finally, the wear behavior of the Co~(1.5)CrFeNi~(1.5)Ti~(0.5)HEA was compared with that of two commercially used wear-resistant alloys. The results obtained provided some first signs of the high-entropy alloys’ better wear performance when tested under sliding conditions against a steel ball.