Microstructure and mechanical properties of diffusion bonded titanium/304 stainless steel joint with pure Ag interlayer

Abstract

In the present study, diffusion bonding of commercially pure titanium to 304 stainless steel (SS) using a pure Ag interlayer was carried out. It is found that the pure Ag interlayer can effectively block the interdiffusion and interaction between Ti and SS. The resultant joints were composed of Ti substrate, Ti-Ag solid solution, TiAg intermetallic phase, the remnant Ag interlayer and SS. Upon tensile loading, fracture took place through the remnant Ag interlayer, indicating that the TiAg intermetallic phase exhibits no detrimental effect on the strength of the joints. A maximum tensile strength of 421 MPa was achieved, which is notably improved compared with previous results. Furthermore, extensive dimples were observed on the fracture surfaces, clearly indicating that the joints were ductile in nature.

A novel Ni–Co–Al multi-principal filler wire for inhibiting Fe–Ti intermetallic compounds in welding CP-Ti/Q345 bimetallic sheets

“…and WZ, similar TZs are commonly observed in dissimilar metal welding of titanium to steel[16,19]. In addition, Chu et al[20] also reported a similar TZ in the welding of CP-Ti/X65 bimetallic sheets.…”

Microstructure and Interfacial Reactions of Resistance Brazed Lap Joints between TC4 Titanium Alloy and 304 Stainless Steel Using Metal Powder Interlayers

“…However, significant differences in the physical properties of these two dissimilar materials, such as their linear thermal expansion coefficient and melting point, can introduce considerable residual stress. Metallurgical incompatibility will result in the formation of brittle Ti-Fe series intermetallic compounds (IMCs), severely deteriorating the joint strength [ 4 , 5 , 6 , 7 ].…”

“…A rational solder is usually chosen as the middle transition layer to block the formation of brittle intermetallic compounds (IMCs) at the titanium alloy/stainless steel interface. Existing research indicates that welding the solid phase with the addition of an intermediate transition metal was an effective method to achieve a reliable connection between titanium alloy and stainless steel [ 4 , 8 , 9 , 10 ]. Parameters such as welding current, welding time and electrode pressure are important to consider in resistance spot welding.…”

Diffusion bonding of Ti‐coated Cf‐SiCf/SiBCN composites to Nb using Ag–Pd interlayer

“…By adding a ductile interlayer with appropriate melting temperature, the joint may possess a good high-temperature performance and the residual stresses presented at the joint interface could be well relieved. 14,15 Consequently, the diffusion bonding is an alternative method for preparing high-temperature joint of the SiBCN-based composites. However, no study on the diffusion bonding of SiBCN has been reported to the best of our knowledge, and more efforts are still needed in this aspect.…”

“…Silver is an attractive interlayer because of its chemical inertness and excellent ductility. 15 The alloying additive of palladium not only provides a higher melting temperature and corrosion resistance, but also maintains the low yield strength and high plasticity of the interlayer. 16,17 Prior to the joining, a dense and uniform Ti is coated on the ceramic surface by magnetron sputtering, to make the diffusion process more time effective and prevent the possible Pd-ceramic reaction.…”