TWI Frequently asked questions
Materials of low thermal conductivity, e.g. titanium and nickel alloys, are ideal for rotary and linear friction welding as the heat generated remains at or close to the bond line, where it is needed.
There is no reason why materials of high thermal conductivity cannot be joined to themselves, or to other materials of lower conductivity, using a variety of friction processes.
However, the best method for managing the heat flow will depend on the materials being welded, the process variant being used, and the size of the components.
High conductivity materials are well suited for friction stir welding, as it is necessary to re-distribute the heat around the tool.
If in doubt, expert advice should be sought from TWI.
