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Microstructural Evolution in Friction Stir Welding of Ti-6Al-4VFriction stir welding (FSW) is a thermo-mechanical process that utilizes a nonconsumable rotating pin tool to consolidate a weld joint. In the conventional FSW process, the pin tool is responsible for generating both the heat required to soften the material and the forces necessary to deform and combine the weld seam. As such, the geometry of the pin tool is important to the quality of the weld and the process parameters required to produce the weld. Because the geometry of the pin tool is limitless, a reduced set of pin tools was formed to systematically study their effect on the weldment with respect to mechanical properties and resultant microstructure. In this study 0deg, 15deg, 30deg, 45deg, and 60deg tapered, microwave sintered, tungsten carbide (WC) pin tools were used to FSW Ti-6Al-4V. Transverse sections of the weld were used to test for mechanical properties and to document the microstructure using optical microscopy. X-ray diffraction (XRD) was also used to characterize the microstructure in the welds. FSW results for the 45deg and 60deg pin tools are reported in this paper.
Document ID
20090014102
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Rubisoff, H.
(Mississippi State Univ. Mississippi State, MS, United States)
Querin, J.
(Mississippi State Univ. Mississippi State, MS, United States)
Magee, D.
(Mississippi State Univ. Mississippi State, MS, United States)
Schneider, J.
(Mississippi State Univ. Mississippi State, MS, United States)
Date Acquired
August 24, 2013
Publication Date
October 5, 2008
Subject Category
Metals And Metallic Materials
Report/Patent Number
MSFC-2141
Meeting Information
Meeting: Materials Science and Technology (MS&T) Conference
Location: Pittsburgh, PA
Country: United States
Start Date: October 5, 2008
End Date: October 9, 2008
Distribution Limits
Public
Copyright
Other

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