SOLID STATE JOINING OF MAGNESIUM TO STEEL

摘要

Friction stir welding and ultrasonic welding techniques wereapplied to join automotive magnesium alloys to steel sheet. Theeffect of tooling and process parameters on the post-weldmicrostructure, texture and mechanical properties wasinvestigated. Static and dynamic loading were utilized toinvestigate the joint strength of both cast and wrought magnesiumalloys including their susceptibility and degradation undercorrosive media. The conditions required to produce jointstrengths in excess of 75% of the base metal strength weredetermined, and the effects of surface coatings, tooling and weldparameters on weld properties are presented.