Effect of Vanadium Contents on Microstructure and Mechanical Properties of Ti–6Al–xV Components Produced by Wire + Arc Additive Manufacturing

Wire + Arc Additive Manufacturing (WAAM) is an advanced manufacturing technology by inexpensive Gas Tungsten Welding (GTAW) technology. Key microstructural features of the as-built WAAM alloy include large columnar β grains, grain boundary α colonies, and Heat Affected Zone (HAZ) banding, which generally leads to low ductility anisotropy. In this study, Ti–6Al–xV (x = 0, 2, 4) alloys were prepared WAAM, effects vanadium content on microstructure, tensile properties impact toughness investigated. Irregular-shaped, plate-like without grains HAZ banding obtained in Ti–6Al alloy. Columnar observed Ti–6Al–2V alloy, size was further enlarged more than ten millimeters 4 mass% addition. With increasing content, a monotonic increase yield strength ultimate can be observed, while fracture strain changed opposite trend. exhibited better matching strength, compared with Ti–6Al–4V