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

Journal Article


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.

Publication Date


  • 2018

Citation


  • 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.

Scopus Eid


  • 2-s2.0-85044502557

Number Of Pages


  • 7

Start Page


  • 176

End Page


  • 183

Volume


  • 137

Place Of Publication


  • United Kingdom

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.

Publication Date


  • 2018

Citation


  • 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.

Scopus Eid


  • 2-s2.0-85044502557

Number Of Pages


  • 7

Start Page


  • 176

End Page


  • 183

Volume


  • 137

Place Of Publication


  • United Kingdom