We suppose that these compounds were released owing to erosion from the faying surface
of steel screw by dissolution of iron in tin matrix of the lead-free solder.
Weld widths were determined by predicting the temperature history at the faying surface (z = 0 m) at various y-distances from the weld center line.
It is important to note that the reported power level corresponds to the actual power at the faying surface.
It is seen that the DW of two faying surfaces is best modeled with temperature-dependent activation energy and based on a temperature history and not a single temperature value.
All faying surfaces
must be conductive and free from nonconductive contaminants such as paints, oxides, and corrosion byproducts.
Filler metals, containing titanium or Ti coatings, were used for brazing ceramics because their properties improve the wetting of ceramics [11-13] and reduce the oxidation of faying surfaces
Aircraft upgrades and substitutions included more corrosion-resistant aluminum alloys in the wings and other structures, better sealants on faying surfaces
, wet installations of fasteners, and use of corrosion-resistant topcoats in critical interior areas.
Equation 2 can then be used to predict the gap height as a function of time, or more importantly, the closing of two faying surfaces as function of time.
As the faying surfaces come into intimate contact, healing of the interfaces occurs.
This joint geometry was selected because it ensured that failure occurred at the faying surfaces and it allowed for rapid and highly controllable heating and cooling.