Effect of V Content on the Corrosion Resistance of Wire Arc Additive Manufactured Ti–6Al–xV Alloys

Abstract

This work investigated the Microstructure and corrosion behavior of wire arc additive manufactured Ti–6Al–xV (x = 0, 2, 4 mass%) alloys with varying vanadium content. It was found that Ti–6Al with pure α phase showed irregular plate-like grains, which was distinct from the grains obtained in α + β alloys. Vanadium additions in the Ti–6Al–xV alloys promoted the formation of martensitic phase. The width of lamellae decreased and the size of prior β grains, the β phase content increased with the increase of Vanadium content. Electrochemical results suggested that Ti–6Al alloy possessed higher corrosion resistance than Ti–6Al–4V. The difference in corrosion behavior could be attributed to grain size and orientation and phase distribution.