ARTICLE – PMPA Member Profile – Axian Technology, Inc

Friction or inertial welds are a key process for attaching precision machined components to other parts like shafts or bodies or forgings.
Easily joins dissimilar metals. This means the ability to use more expensive corrosion resisting materials where needed, and less resistant but sufficiently strong materials where there is no need- ON THE SAME PART.
The full surface of the cross section is made up of both metals, airtight and absent of voids.
Friction welds are higher strength than other means of joining.
Friction welds often cost less as there are no consumables like filler metals fluxes etc. (This would be the bottom line for most businessmen, but I chose another, see # 7 below.)
Friction welds minimize the Heat Affected Zone (HAZ).
Friction welding minimizes the need to clean furnace residues from the entire part post welding.
The ability of a designer to optimize material choices by using friction welding cannot be overstated