Testing of the Structure and Mechanical Properties of Technical Titanium Joints

Figure 7

The microstructure of the welded joint of the thickness 𝛿₁ at 𝐼<𝐼_opt: the fine-grained structure of the base material after rolling with the phase  α  coming into the heat-affected zone with thick grains, inclusions of the phase  β  (a); partial or complete recrystallization of the phases 𝛼+𝛼^′ and  β  (b); thick grains of the phases 𝛼+𝛼^′ and great dislocation density (c); the phase 𝛼^′ spines and the deformation twins (d).

(a)

(b)

(c)

(d)