Wear and electrochemical corrosion behavior of vacuum arc melted CoCuFeNiZr multi-phase high entropy Alloy
Solid State Sciences, cilt.179, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 179
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.solidstatesciences.2026.108367
- Dergi Adı: Solid State Sciences
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Corrosion, High entropy alloys, Structural properties, Wear
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
The equiatomic CoCuFeNiZr high-entropy alloy (HEA) was successfully manufactured via vacuum arc melting. HEA was characterized in terms of phase structure, tribological behavior, and corrosion performance. XRD revealed a multiphase structure with dominant FCC and BCC phases and Zr-rich Laves phases. SEM-EDS identified FCC matrix, Fe-rich BCC regions, Cu-rich segregations, Zr-rich Laves phase, and nearly pure Zr zones, confirming significant elemental partitioning during solidification. Tribological tests showed coefficients of friction of ∼0.4 at 12.5 N, ∼0.5 at 25 N (after an initial ∼0.6), and ∼0.8 at 50 N, with wear rates increasing from 5.1 × 10−5 mm3/N⋅m, 5.46 × 10−5 mm3/N⋅m, and 6.3 × 10−5 mm3/N⋅m as the load increased, respectively. Potentiodynamic polarization tests occurred at an Ecorr of −0.412 V, icorr of 2.04 × 10−5 A/cm2, and a corrosion rate of 9.08 mpy. SEM of worn surfaces revealed a transition from mild abrasive wear to severe adhesive wear and delamination with rising load, correlating with friction and wear data.