Effects of milling on the corrosion behavior of Al2NbTi3V2Zr high‐entropy alloy system in 10% nitric acid solution

• Published in: Materials and corrosion Vol. 68; no. 10; pp. 1080 - 1089
• Main Authors: Tan, X. R., Zhi, Q., Yang, R. B., Wang, F. Z., Yang, J. R., Liu, Z. X.
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.10.2017
• Subjects: Al2NbTi3V2Zr alloy; Alloy systems; Aluminum base alloys; Corrosion effects; Corrosion rate; Corrosion resistance; Corrosion resistant alloys; High entropy alloys; Hot pressing; Localized corrosion; microstructure; milling process; Nitric acid; Uniform attack (corrosion)
• ISSN: 0947-5117; 1521-4176
• DOI: 10.1002/maco.201709472

Al2NbTi3V2Zr alloys were prepared by low‐energy (LE) and high‐energy (HE) ball milling and subsequent vacuum hot pressing. The corrosion behavior of the Al2NbTi3V2Zr alloy in 10 wt% HNO3 solution was investigated. Results showed that the HE bulk exhibited improved corrosion resistance than the LE bulk. Both had lower corrosion rates than Ti64. The LE bulk displayed localized corrosion whereas the HE bulk exhibited general corrosion and a wide passive region. The corrosion resistance of the alloy depended on the content of the secondary phase for the LE bulk, whereas grain size of the secondary phase and matrix influenced the HE bulk. Al2NbTi3V2Zr alloys were prepared by low‐energy (LE) and high‐energy (HE) ball milling and subsequent vacuum hot pressing. The corrosion behavior of the Al2NbTi3V2Zr alloy in 10 wt% HNO3 solution was investigated. Results showed that the HE bulk exhibited improved corrosion resistance than the LE bulk. Both had lower corrosion rates than Ti64.