Effects of thread interruptions on tool pins in friction stir welding of AA6061

Reza-E-Rabby, Md.; Tang, Wei; Reynolds, Anthony P.

doi:10.1080/13621718.2017.1341363

Effects of thread interruptions on tool pins in friction stir welding of AA6061

Journal Article · Wed Jun 21 00:00:00 EDT 2017 · Science and Technology of Welding and Joining

DOI:https://doi.org/10.1080/13621718.2017.1341363· OSTI ID:1376495

Reza-E-Rabby, Md. ^[1]; Tang, Wei ^[2]; Reynolds, Anthony P. ^[1]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this paper, effects of pin thread and thread interruptions (flats) on weld quality and process response parameters during friction stir welding (FSW) of 6061 aluminium alloy were quantified. Otherwise, identical smooth and threaded pins with zero to four flats were adopted for FSW. Weldability and process response variables were examined. Results showed that threads with flats significantly improved weld quality and reduced in-plane forces. A three-flat threaded pin led to production of defect-free welds under all examined welding conditions. Spectral analyses of in-plane forces and weld cross-sectional analysis were performed to establish correlation among pin flats, force dynamics and defect formation. Finally, the lowest in-plane force spectra amplitudes were consistently observed for defect-free welds.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; National Science Foundation (NSF) (United States)

Contributing Organization:: Univ. of South Carolina, Columbia, SC (United States)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1376495

Journal Information:: Science and Technology of Welding and Joining, Journal Name: Science and Technology of Welding and Joining Journal Issue: 2 Vol. 23; ISSN 1362-1718

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

42 ENGINEERING
flats
friction stir welding
in-plane forces
threaded pin
unthreaded pin

Effects of thread interruptions on tool pins in friction stir welding of AA6061

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