Infrared brazing of Ti–6Al–4V and 17-4 PH stainless steel with (Ni)/Cr barrier layer(s)

High strength bonding of titanium to stainless steel using an Ag interlayer

“…Like those in previous studies [8,9,11,14], the Ti-STS brazed joint was dominated by brittle Ti-based IMCs due to a significant dissolution of the Ti substrate. It was also considered that these Ti-based IMCs could not be avoided by only using a Ag-based filler (BAg-8) alone in our present experimental regime.…”

“…To the best of our knowledge, the bonding strengths of the Ti-STS dissimilar joints are known to be too low (usually less than 100 MPa) for these joints to be technically usable due to the presence of brittle Tibased IMCs [8,9,12]. In some cases, higher strengths (up to 250 MPa) have been obtained by optimizing a joint structure [11,17]. It is worthwhile noting, however, that all the previous studies failed to suppress the formation of brittle IMCs in a joint, and the resultant bonding strengths were not reproducible, owing to a lack of structural consistency for the brittle IMCs from sample to sample.…”

“…Those IMCs were unavoidably produced by the reaction of the Ti elements coming from the substrate with either the counterpart STS substrate or the fillers used [5][6][7][8][9]. Additional efforts have also been made to avoid such a fundamental brittleness of a Ti-STS dissimilar joint by using a diffusion barrier such as Ni, Cu and Cr, but they were unsuccessful in suppressing the formation of the brittle IMCs, owing to an undesired reaction of the diffusion barrier with either the substrates or the fillers used [10][11][12].…”

Numerical simulation and experimental investigation of laser overlap welding of Ti6Al4V and 42CrMo

“…Li et al (2006) reported vacuum brazing of titanium-aluminum alloy and alloy steel using Ag-Cu/Ti/Ag-Cu filler metal, the author referred to the presence of intermetallic compounds in the reaction layer that weakened the mechanical properties of the joint. Shiue et al (2008) studied the infrared brazing of Ti-6Al-4V and 17-4 PH stainless steel using two silverbased braze alloys with (Ni)/Cr barrier layer(s) and referred to the inhibition of the interfacial reaction between the 17-4PH SS and the molten braze during brazing. Ghosh et al (2003) used solid-state diffusion bonding to produce transition joints between Ti-5.5Al-2.4V and stainless steel 304.…”

Vacuum Brazing TC4 Titanium Alloy to 304 Stainless Steel with Cu-Ti-Ni-Zr-V Amorphous Alloy Foil

“…However, for solid-state welding and brazing processes, the parent metal does not melt and the formation of intermetallic compounds could be controlled. So, the welding between titanium alloy and steel concentrated in friction welding , diffusion welding ( , and brazing (Ref [15][16][17][18][19]. Compared to friction welding and diffusion welding, brazing process possesses advantages in joint design, residual stress reduction, and controlling the generation of brittle Ti-Fe intermetallic compounds.…”