Electroshock treatment dependent microstructural evolution and mechanical properties of near-β titanium alloy manufactured by directed energy deposition

Effects of electroshock treatment (EST) on the microstructural evolution and mechanical properties near-β titanium alloy (Ti-55531) formed by directed energy deposition (DED) was studied in this work. With increase EST time, average hardness specimen decreased from 426 HV to 316 HV, fracture strain increased significantly, which attributed uniform dispersion α phase along grain boundaries inside β grains. After EST, texture intensity terms orientation distribution function (ODF), ascribed redistribution phase. Moreover, more atomic vacancies lattice distortion were near α/β interfaces, verified transmission electron microscopy (TEM) observation migration atoms interface under EST. External loadings facilitated dislocation motion distortions resulted reduction improvement ductility. The above results indicated that can quickly alter microstructure DED alloys as a simple energy-saving method.