Diffusion bonding of Al–Li alloys

Diffusion bonding of titanium to 304 stainless steel

“…This technique provides novel joining operation for similar and dissimilar materials without gross microscopic distortion and with close dimensional tolerance. This method has already proved considerable potential for joining of Ti and Al base alloys [3][4][5][6][7]. Joining of varieties of dissimilar and similar materials has already been carried out by diffusion bonding, though many of the parameters of the thermomechanical processing are yet to be established on commercial scale [8][9][10][11][12][13].…”

Latest developments for microstructural and chemical characterization of diffusion bonding in superplastic 8090 Al–Li alloys

“…8,9,10,17 If significant levels of oxygen are present in that atmosphere, it leads to preferential oxidation of the bond interface that keeps the surfaces from bonding. Now, although when lithium is present the alloy reactivity increases, it could contribute to the destruction of the protective film due to the reaction of Li with alumina forms less resistant and more soluble oxides (mixed oxides of Li, Al, and Mg).…”

“…[4][5][6][7] For this reason, research in this field is targeted on the study of solid-state welding, whether by direct joining or through the use of metallic interlayers. [8][9][10][11] Furthermore, Al -Li alloys exhibit excellent superplastic properties under certain conditions. 12,13 Unquestionably, if the gas blowing superplastic forming (SPF) technique is combined with diffusion bonding (DB), a low cost manufacturing process would be available for fabricating complex structures in the aircraft and aerospace industries.…”

The Optimal Surface Roughness Condition on Diffusion Bonding

“…There have been reported several solution of this problem; inserted inter layer, 15,16) surface treatment, [10][11][12][13][17][18][19] carried out diffusion bonding in vacuum 5,6) or inert gas such as Ar. 9,20) The surface treatment, especially grit blast, is the most famous method in this solution. Before diffusion bonding, grit blast treatment is performed to remove the surface oxides and supply rugged surface.…”