Microstructure of diffusion-bonded joints in Al-Li 8090 alloy

Interface evolution and bond strength when diffusion bonding materials with stable oxide films

“…19,20 Using this technique, Al-8090 bonds with shear strengths up to 190 MPa were produced, which is 90% of the shear strength (210 MPa) of the parent material. However, the complicated surface preparation method used for oxide removal is very restrictive and therefore is likely to have only laboratory application.…”

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

“…[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.…”

“…To do that, it is necessary to study the microstructural and chemical characterization of the bond interfaces. This problem has been studied by most researchers, 10,11,18 applying conventional techniques for microstructural characterization, such as optical microscopy and scanning and transmission electron microscopy (SEM and TEM), complemented by other chemical characterization techniques 19 : energy dispersive x-ray microanalysis (EDS), x-ray photoelectric spectroscopy (XPS), and Auger electron spectroscopy (AES). Although the mentioned techniques allow one to study in depth the joint interfaces, they imply some limitations.…”

Welding and Joining of Magnesium Alloys

“…During manufacturing of complex sheet structures, diffusion bonding is often combined with superplastic forming. The combination allows to reduce weight and fabrication cost, as compared with mechanically fastened structures (Gilmore et al, 1991). The technology was successfully implemented for superplastic magnesium alloy AZ31 with a grain size of approximately 17 μm (Fig.…”