NDLI: The influence of friction stir weld tool form and welding parameters on weld structure and properties: nugget bulge in self-reacting friction stir welds

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The influence of friction stir weld tool form and welding parameters on weld structure and properties: nugget bulge in self-reacting friction stir welds

Content Provider	NASA Technical Reports Server (NTRS)
Author	Nunes Jr., Arthur C. Brendel, Michael S. Schneider, Judy
Copyright Year	2010
Description	Although friction stir welding (FSW) was patented in 1991, process development has been based upon trial and error and the literature still exhibits little understanding of the mechanisms determining weld structure and properties. New concepts emerging from a better understanding of these mechanisms enhance the ability of FSW engineers to think about the FSW process in new ways, inevitably leading to advances in the technology. A kinematic approach in which the FSW flow process is decomposed into several simple flow components has been found to explain the basic structural features of FSW welds and to relate them to tool geometry and process parameters. Using this modelling approach, this study reports on a correlation between the features of the weld nugget, process parameters, weld tool geometry, and weld strength. This correlation presents a way to select process parameters for a given tool geometry so as to optimize weld strength. It also provides clues that may ultimately explain why the weld strength varies within the sample population.
File Size	4765587
Page Count	13
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20100024372
Archival Resource Key	ark:/13960/t6tx89r57
Language	English
Publisher Date	2010-05-18
Access Restriction	Open
Subject Keyword	Mechanical Engineering Bulging Welded Joints Friction Stir Welding Weld Strength Kinematics Tools Shapes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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