Influence of Tungsten Addition on Microstructure and Tensile Properties of Ti6Al4V Fabricated by Laser-Directed Energy Deposition

The addition of tungsten can improve the high-temperature oxidation resistance titanium alloys. However, as its applications continue to expand, new demands are being placed on room temperature strength. Here, we provide a dense alloy with high strength by introducing proper W powders into Ti6Al4V under direct energy deposition. effect microstructure and tensile properties was investigated. Compared pure Ti6Al4V, exhibited refined α′ martensite β grains, which is attributable structural subcooling formation martensite. Owing synergistic strengthening effects grain refinement solid solution strengthening, W-containing shows 1333 MPa yield 1219 MPa, significantly higher than alloy’s 940 860 MPa. This approach provides pathway for design preparation high-strength alloys additive manufacturing.