Infrared brazing of high-strength titanium alloys by Ti–15Cu–15Ni and Ti–15Cu–25Ni filler foils

Infrared brazing of Ti50Al50 and Ti–6Al–4V using two Ti-based filler metals

“…The amount of Ti 2 Ni phase is decreased with increasing the brazing time, and the infrared brazed joint for 900 s is free from Ti 2 Ni phase, as demonstrated in Fig. 2 the Ti-rich phase eventually dominates the entire brazed joint [14]. It is in accordance with our experimental observation.…”

“…4. This phenomenon is in accordance with the previous studies in brazing high-strength titanium alloys [14,15].…”

“…However, most Ag-based braze alloys have low tensile strength and limited creep strength above 400 C as compared with the Ti-based braze alloys [7]. In contrast, Ti-Cu-Ni filler foils demonstrate excellent bonding performance in brazing many titanium alloys [13][14][15]. Both Ti-15Cu-25Ni and Ti-15Cu-15Ni in wt% were chosen to braze Ti 50 Al 50 and Ti-6Al-4V in the experiment.…”

“…It has been proven to be a useful method to investigate the microstructural evolution of the brazed joint in the previous studies [9,10,14,15]. Both the microstructural evolution and shear strength of infrared brazed Ti 50 Al 50 and Ti-6Al-4V joints using two Ti-based braze alloys were evaluated in the study.…”

Low-Temperature Brazing of Titanium Using Al-Based Filler Alloys

“…e diffusion of some brazing processes, usually in high temperature, may proceed for a relatively long holding time until achieving the microstructure homogenization over all the joint, which is particularly known as diffusion brazing. Matsu et al, Ganjeh et al and Chang et al [16,17,42] investigated the diffusion brazing of several Ti-and Zr-based fillers, which led to specific microstructures and high shear strengths (Table 1). ese processes involve isothermal solidification and homogenization of the joint [43].…”