Structure of the welding zone between titanium and orthorhombic titanium aluminide for explosion welding: I. Interface

The problem of intermixing of metals possessing no mutual solubility upon explosion welding (Cu–Ta, Fe–Ag, Al–Ta)

“…Attention is drawn to their perfect spherical shape which minimizes the surface energy. In various titaniumaluminide joints, the spherulites were observed only in (A p ) joint [5]. As from Figs.…”

“…No dendrites were observed in copper-tantalum joints. In various titanium-aluminide joints dendrites were observed only in (B p ) [5].…”

“…1b). For the first time cusps had been found in titanium-aluminide joint [5]. The depth of their penetration from one material to another is about tens of micrometers.…”

“…More urgently the question rises when we are talking about materials that possess no mutual solubility, even in the liquid state. Welded joints of metal-intermetallic possessing a normal mutual solubility in both liquid and solid states had been investigated previously [4][5][6][7]. Commercially pure titanium was chosen as a metal, and orthorhombic titanium aluminide based alloys ("aluminide" for short) were selected as an intermetallic compound.…”

Inhomogeneities of the interface produced by explosive welding

“…Titanium-Orthorhombic Titanium Aluminide [5][6][7][8][9][10][11][12][13][14] In both orthorhombic alloys under different regimes of explosive welding there were observed interfaces of different types: almost flat boundaries, along which melting occurred [12]; and wavy bound aries, which will be considered further (A, B). Figure 1 shows the optical images (OM) of the investigated interfaces (transverse sections) in the VTI 1-titanium joint (Figs.…”