Influence of the Coarse Grain Structure of a Titanium Alloy Ti-4Al-3V Formed by Wire-Feed Electron Beam Additive Manufacturing on Strain Inhomogeneities and Fracture

In this work, based on the multilevel approach, the features of the structure and properties of titanium alloy, formed during high-performance additive manufacturing by wire-feed electron beam technology, were studied. Methods of non-destructive X-ray control and tomography, along with optical and scanning electron microscopy, were used to study the structure at different scale levels of the sample material. The mechanical properties of the material under stress were revealed via the simultaneous observation of the peculiarities of deformation development, using a Vic 3D laser scanning unit. Using microstructural and macrostructural data, as well as fractography, the interrelations of structure and material properties caused by the technological features of the printing process and the composition of used welding wire were revealed.

Automated summary

Based on the multilevel approach, the study investigated the structure and properties of titanium alloy in the high-performance additive manufacturing process using wire-feed electron beam technology. Non-destructive X-ray control, tomography, optical and scanning electron microscopy techniques were employed to analyze the structure at different scales. The mechanical properties under stress were determined through observation of deformation development using a Vic 3D laser scanning unit. The interrelations between structure and material properties, caused by the printing process and welding wire composition, were revealed through microstructural and macrostructural data analysis, as well as fractography.