Characterization of hydrogenated niobium interlayer and its application in TiAl/Ti2AlNb diffusion bonding

The impact of microstructural refinement on the tribological behavior of niobium processed by Indirect Extrusion Angular Pressing

“…As a hypoallergenic metal, it has been employed in jewelry and coin manufacturing technologies [1]. As a light-ductile metal, it has a wide range of applications in superconducting radio frequency (SCRF) technology [2,3], nuclear reactors, chemical processes [4], energy storage [5][6][7], cutting tool substrate in the form of carbide [8], etc. Niobium is usually covered with a dense layer of oxide, thereby providing a high level of corrosion resistance.…”

The Influence of Diffuse Element in Solid-State on Dissimilar Joint between Semi-Solid Cast 7075 with 6061 Al Alloy by Diffusion Welding

“…The welding temperature is around 0.5-0.8Tm, which heat input is lower than Tm (when Tm is the melting temperature of materials) [7]. This method has its own advantages on produced microstructures in bonded lines similar to those of the base metal, low distortion, ability to weld different materials, no filler rod, and no defects associated with fusion welding [8]. Moreover, the DW of both materials is difficult because the different Tm of the different materials, chemical composition, and diffusion coefficient values [9].…”

Microstructure and mechanical properties of Ti-Ti2AlNb interface

“…Du et al 13 reported that the four-layer honeycomb structure of Ti 22 Al 27 Nb alloy was manufactured by SPF/DB process while the diffusion bonding parameter was 970 C/10 MPa/2 h. Zhu et al 14 studied the dissimilar diffusion bonding behavior of hydrogenated Ti 2 AlNb-based and Ti-6Al-4V alloys. Wang et al 15 reported that the shear strength of TiAl/ Ti 2 AlNb joint reached 258.9 MPa at 950 C for 40 min under a pressure of 5 MPa with the hydrogenated niobium (Nb) interlayer of 1.0 wt% hydrogen content. Zhu et al 16 reported that the optimized parameter for direct solid-state diffusion bonding of high Nb containing TiAl to Ti 2 AlNb alloy was obtained as 1000 C/20 MPa/90 min.…”