Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Friction stir welding in plastics?

  1. Apr 3, 2014 #1
    I'm familiar with the process of friction stir welding, which has been used with great success for assembling the fuel tanks for satellite launchers like the Delta IV and the Atlas V. However, I was wondering if, from a theoretical aspect, it would be possible to friction stir weld together plastics. I know that it'd be tough, if not outright impossible, with fiber-reinforced plastics. It's also not practical, when you can simply mold the plastic into shape in the first place. But the question remains:

    Can it be done at all?
  2. jcsd
  3. Apr 3, 2014 #2


    User Avatar
    Gold Member

    No reason why not, provided the plastic is not thermosetting.
    However, that means stuff such as the matrix material for aerospace composites is not suitable.
    Polyethylene plastics however would be ok, although there may be substantial material property changes if the friction stirring decrystallises the welding zone.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook