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Title: Hybrid friction stir welding for dissimilar materials through electro-plastic effect

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.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1455186
Assignee:
The Regents of The University of Michigan (Ann Arbor, MI) HQPR
Patent Number(s):
9,981,338
Application Number:
14/742,749
Contract Number:
PI0000012
Resource Relation:
Patent File Date: 2015 Jun 18
Research Org:
Washington Procurement Operations Office, Washington, DC (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English

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