Effect of adding titanium on corrosion and wear resistance of Al0.7CoCrFeNiTix high entropy alloy
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Walczak Mariusz, Nowak Wojciech J., Vališ David, Okuniewski Wojciech, Chocyk Dariusz, Pasierbiewicz Kamil |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 26 |
| Numer artykułu: | 267 |
| Strony: | 1 - 23 |
| Impact Factor: | 4,9 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 7 września 2026 |
| Abstrakty: | angielski |
| High-entropy alloys based on the Al-Co-Cr-Fe-Ni system are considered promising materials for applications exposed to wear and corrosive environments. In this study, the effect of titanium addition on the microstruc- ture, mechanical properties, tribological performance and corrosion behaviour of Al0.7CoCrFeNiTix alloys (x = 0, 0.05, 0.2 and 0.5) produced by arc melting was investigated and compared with AISI 304L stainless steel. Microstructural analyses revealed a gradual evolution from a lamellar Widmanstätten morphology to a more complex multiphase structure with an increasing fraction of BCC/B2 phases and enhanced chemical segrega- tion between Al–Ti–rich and Fe–Cr-rich regions. At the highest Ti content, additional intermetallic phases such as Ni3Ti and σ were identified. Increasing Ti content significantly improved hardness and nanoindentation parameters (H/E and H3/E2), indicating enhanced resistance to plastic deformation under contact loading. Slid- ing tests performed in 3.5 wt.% NaCl solution showed that the Al0.7CoCrFeNiTi0.2 alloy exhibited the lowest wear factor, approximately 54% lower than that of the Ti-free alloy. The wear behaviour was dominated by abrasive and oxidative mechanisms. Electrochemical measurements indicated that Ti addition reduced the cor- rosion current density and improved passivation behaviour, while the highest pitting resistance was obtained for the Ti0.2 composition. Localized corrosion preferentially initiated in Al–Ni-rich regions depleted in Cr. Overall, the results indicate that the Al0.7CoCrFeNiTi0.2 alloy provides the most favourable combination of mechanical, tribological and corrosion properties in chloride-containing environments. |
