The anisotropic corrosion behaviour of wire arc additive manufactured Ti-6Al-4V alloy in 3.5% NaCl solution

Authors

Bintao Wu, University of WollongongFollow
Zengxi Stephen Pan, University of WollongongFollow
Siyuan Li, Fudan University
Dominic Cuiuri, University of WollongongFollow
Donghong Ding, Foshan UniversiytFollow
Hui Jun Li, University of WollongongFollow

RIS ID

125567

Publication Details

Wu, B., Pan, Z., Li, S., Cuiuri, D., Ding, D. & Li, H. (2018). The anisotropic corrosion behaviour of wire arc additive manufactured Ti-6Al-4V alloy in 3.5% NaCl solution. Corrosion Science, 137 176-183.

Abstract

This study investigates the relationships between corrosion resistances, microstructure and phase composition of Ti-6Al-4V components that have been fabricated with the gas tungsten wire arc additive manufacturing (GT-WAAM) process, through the use of electrochemical corrosion testing, optical microscopy, X-ray diffraction and hardness testing. The corrosion behaviour is anisotropic due to corresponding anisotropy in microstructure, phase structure, grain size and orientation within the WAAM-processed Ti-6Al-4V alloy. Compared to ASTM standard wrought Ti-6Al-4V, the WAAM-processed alloy has a slightly inferior corrosion resistance owing to the formation of asymmetrical structures with lamellar α and acicular α' phases, that display preferred orientation.