The structural and texture analysis of titanium alloy Ti-6Al-4V samples obtained by direct metal deposition

Abstract

The paper presents the results of structure and texture formation study in Ti-6Al-4V alloy samples, obtained by Direct Metal Deposition technology of additive manufacturing. The effect of annealing on the formation of the structure and texture in 3D-samples was investigated. It is shown that the samples have a two-phase structure of “basket weaving” in the initial state and after annealing. It is established that the samples have significant anisotropy of properties in two mutually perpendicular directions that could be explained by the presence of the crystallographic texture.

Microstructural, mechanical, electrochemical, and biological studies of an electron beam melted Ti-6Al-4V alloy

“…This means that both phases have a no-random distribution of crystal planes through the sample, and both studied conditions developed different crystallographic textures. As the texture strongly influences the surface energy, it is closely related to the mechanical, physical, and biological properties of Ti alloys [44][45][46][47]. Therefore, different properties can be expected between forged and EBMed conditions.…”

Effect of the Ti6Al4V Alloy Track Trajectories on Mechanical Properties in Direct Metal Deposition

“…The porosity does not exceed 1% with direct laser melting, but the movement of the laser along different trajectories, with the possibility of texture formation in different metallographic planes [25][26][27], leads to the appearance of properties anisotropy [25].…”

“…Products from titanium alloys are manufactured using both selective laser melting (SLM) [11][12][13][14][15][16][17][18][19][20][21][22][23][24] and laser metal deposition (LMD) [25][26][27] technologies.…”

“…It is possible to use several types of materials: Metal powder or wire in this method. The LMD process is applicable to create infinitely large products of complex geometric shapes with small tolerances and high properties [25]. Moreover, the process of direct laser deposition is used to create new components of parts with high geometric complexity [26], which would require much more production hours or the possibility of creating a single whole product using detachable components to create it using traditional processing methods.…”