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Open AccessArticle

Influence of WC-Based Pin Tool Profile on Microstructure and Mechanical Properties of AA1100 FSW Welds

1
Department of Mechanical Engineering, University of Canterbury, Christchurch 8041, New Zealand
2
Department of Mechanical Engineering, Kish International Campus, University of Tehran, Kish lsand 79416-55665, Iran
3
Department of Mechanical Engineering, École de Technologie Supérieure (ETS), Montreal, QC H3C 1K3, Canada
*
Author to whom correspondence should be addressed.
Current Address: Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran.
Technologies 2020, 8(2), 34; https://doi.org/10.3390/technologies8020034
Received: 4 April 2020 / Revised: 2 June 2020 / Accepted: 5 June 2020 / Published: 15 June 2020
(This article belongs to the Special Issue Reviews and Advances in Materials Processing)
The effect of various tungsten carbide (WC) pin tools and operating parameters on the material structure and properties of an AA1100 friction stir welding (FSW) weld were evaluated. Three different pin shapes were employed (conical, square and threaded). For each tool shape, welds were generated for a set of tool (revolutions per minute, RPM) (710, 1120 and 1400) and advancing speeds (150, 250 and 400 mm/min). Weld samples were tested for mechanical strength by tensile testing. Morphology was examined using optical microscopy, and weld composition with scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). No weld contamination from the tools was observed. However, a number of structural defects, inherent to the FSW process, were observed (including tunnel voids, kissing bonds and swirling lines). These defects, associated with the stirring action, could not be eliminated. The results show how the operating parameters may be optimized to produce stronger welds. View Full-Text
Keywords: friction stir welding; WC; AA1100 aluminium plate; weld contamination; tunnel void; kissing bond friction stir welding; WC; AA1100 aluminium plate; weld contamination; tunnel void; kissing bond
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MDPI and ACS Style

Tamadon, A.; Baghestani, A.; Bajgholi, M.E. Influence of WC-Based Pin Tool Profile on Microstructure and Mechanical Properties of AA1100 FSW Welds. Technologies 2020, 8, 34.

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