NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Prolegomena to the Study of Friction Stir WeldingThe literature contains many approaches toward modeling of the friction stir welding (FSW) process with varying treatments of the weld metal properties. It is worthwhile to consider certain fundamental features of the process before attempting to interpret FSW phenomena: Because of the unique character of metal deformation (as opposed to, say, viscous deformation) a velocity "discontinuity" or shear surface occurs in FSW and determines much of the character of the welding mechanism. A shear surface may not always produce a sound bond. Balancing mechanical power input against conduction and convection heat losses yields a relation, a "temperature index", between spindle speed and travel speed to maintain constant weld temperature. But many process features are only weakly dependent upon temperature. Thus, unlike modeling of metal forming processes, it may be that modeling the FSW process independently of the material conditions has some merit.
Document ID
20100042505
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Nunes, Arthur C., Jr. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 25, 2013
Publication Date
October 17, 2010
Subject Category
Engineering (General)
Report/Patent Number
M10-0791
M10-0635
Meeting Information
Meeting: Materials Science and Technology 2010 Conference and Exhibition
Location: Houston, TX
Country: United States
Start Date: October 17, 2010
End Date: October 21, 2010
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available