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HYBRID FRICTION STIR WELDING FOR DISSIMILAR MATERIALS THROUGH ELECTROPLASTIC EFFECT

United States Patent Application

20150375335
A1
View the Complete Application at the US Patent & Trademark Office
A hybrid Friction Stir Welding approach and device for dissimilar materials joining employing Electro-Plastic Effect. The approach and device include an introduction of high density, short period current pulses into traditional friction stir welding process, which therefore can generate a localized softened zone in the workpiece during plastic stirring without significant additional temperature increase. This material softened zone is created by high density current pulses based on Electro-Plastic Effect and will move along with the friction stir welding tool. Smaller downward force, larger processing window and better joint quality for dissimilar materials are expected to be achieved through this hybrid welding technique.
LIU, Xun (Ann Arbor, MI), LAN, Shuhuai (Ann Arbor, MI), NI, Jun (Ann Arbor, MI)
14/ 742,749
June 18, 2015
GOVERNMENT INTEREST [0002] This invention was made with government support under DE-PI0000012 awarded by the Department of Energy. The Government has certain rights in the invention.