Determination of structural, tribological, isothermal oxidation and corrosion properties of Al–Co–Cr–Fe–Ni–Ti–Cu high-entropy alloy

Sünbül S. E., İçi̇n K., Şeren F. Z., Şahin Ö., Çakil D. D., Sezer R., ...Daha Fazla

Vacuum, cilt.187, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 187
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.vacuum.2021.110072
  • Dergi Adı: Vacuum
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, Computer & Applied Sciences, INSPEC, Metadex
  • Anahtar Kelimeler: High entropy alloys, Microstructure, Surface oxidation, Tribological properties, Corrosion resistance, WEAR BEHAVIOR, MECHANICAL-PROPERTIES, PHASE EVOLUTION, AL-CONTENT, FE-NI, MICROSTRUCTURE, RESISTANCE, TI, TEMPERATURE, STABILITY
  • Gazi Üniversitesi Adresli: Evet

Özet

© 2021 Elsevier LtdIn the present work, Al10Co24Cr10Fe15Ni34Ti6Cu1 (at.%) was obtained high entropy alloy (HEA) with vacuum arc melting. The microstructure, tribological properties, oxidation, and corrosion resistance of the HEA were detailly investigated. The faced-centered cubic solid solution structure was observed in the microstructure. SEM analysis shows that Fe, Co, and Cr elements are dominant in the dendrite region, the interdendritic regions are significantly enriched in Al and Ti elements. The average friction coefficients for 0.5 MPa, 1 MPa, and 1.5 MPa loads were found as 0.59, 0.64, and 0.68, respectively. The specific wear rates generally raised in consequence of the increase in the same applied loads. The time-dependent oxidation amount exponentially increased in our HEA. Oxide formation appeared as TiO2 and AlFeO3 in the oxidation process at 900 °C. The corrosion potential (Ecorr) and the corrosion current density (Icorr) values of the alloy were determined −0.082 V and 2.18 × 10−8 A/cm2, respectively.