2013
DOI: 10.1016/j.matchemphys.2013.05.073
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The effect of a paint bake treatment on joint performance in friction stir spot welding AA6111-T4 sheet using a pinless tool

Abstract: It has been previously shown that it is possible to produce friction stir spot welds (FSSW) in thin (1 mm thick) aluminium sheet, when using a tool without a probe, which has the significant advantage of not leaving a keyhole in the weld. The aim of this paper was to investigate the effect of a post-weld paint bake cycle on the performance and precipitation behaviour of FSSW joints produced using a pinless tool, in the heat-treatable Al automotive alloy AA6111-T4, with rapid, industrially relevant, weld cycle … Show more

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Cited by 28 publications
(5 citation statements)
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“…This can be explained by the influence of severe plastic deformation and frictional heating. 28,38 Figure 15a and b shows the micrographs observed at the BM and HAZ, respectively, by means of scanning transmission electron microscopy (STEM). A large number of round precipitates, which were identified as Feand Si-bearing β ′′ dispersoids, were seen within a single grain matrix.…”
Section: Microstructural Characterisation By Temmentioning
confidence: 99%
“…This can be explained by the influence of severe plastic deformation and frictional heating. 28,38 Figure 15a and b shows the micrographs observed at the BM and HAZ, respectively, by means of scanning transmission electron microscopy (STEM). A large number of round precipitates, which were identified as Feand Si-bearing β ′′ dispersoids, were seen within a single grain matrix.…”
Section: Microstructural Characterisation By Temmentioning
confidence: 99%
“…This method was initially employed by Mazda in the year 2003 to join the hood structures in cars. 35 Although this technique provides unique advantages over RSW and SPR, the keyhole left behind by the tool is a matter of concern because it acts as a stress concentration factor and reduces corrosion resistance. The keyhole formation in FSSW of thin sheets is avoided by using pinless or probe-less tools.…”
Section: Introductionmentioning
confidence: 99%
“…Its main disadvantage is a keyhole [10] while it remains on the surface of the joint. The keyhole remained in the FSSW joints, as shown in Figure 1, seriously reduces the joint properties such as tensile shear strength and fatigue strength, and the corrosion can take place preferentially at the keyhole [11]. Some techniques have been developed to prevent the formation of the keyhole.…”
Section: Introductionmentioning
confidence: 99%