Patent Abstracts on Friction Stir Welding

* Friction stir welding of dissimilar metals.

* Method for improving aluminum-zirconium-based amorphous alloy friction stir welding joint strength.

* Double-layer gas protection cover for friction stir welding of titanium and titanium alloy.

* Hydrogen production method and device based on aluminum or magnesium underwater stir friction welding process.