Friction stir welding improvements for metal matrix composites, ferrous alloys, non-ferrous alloys, and superalloys using a superabrasive tool

摘要

A friction stir welding system that enables clamping of a pipe to enable friction stir welding around the pipe OD, a movable mandrel that provides a counter-force to the pressure exerted on the outside of a pipe by a tool, and a system for providing friction stir welding and repair inside a nuclear vessel in an underwater environment.