Structure–properties relations in spot friction welded (also known as friction stir spot welded) 6111 aluminum

Mitlin, David; Radmilović, V.; Pan, Tsung-Yu; Chen, J.; Feng, Zhili; Santella, Michael L

doi:10.1016/j.msea.2006.06.126

Cited by 135 publications

(77 citation statements)

References 21 publications

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“…However, TPT has been reported to decrease the joint volume and the upper plate thickness, owing to the deep tool penetration. 8,9) Therefore, a new tool without threaded pin has recently been developed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pin Shapes on Joint Characteristics of Friction Stir Spot Welded AA5J32 Sheet

et al. 2010

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The joint strength of friction stir spot welded 5J32 Al alloy was investigated according to the tool shape (threaded pin tool: TPT; cylindrical tool: CT; cylindrical tool with projection: CTP) and tool penetration depth. With increasing tool penetration depth, the vertical joint deformation increased in TPT and CT, whereas the joint diameter increased in TPT. The tensile shear load of the joint using TPT and CT did not vary with tool penetration depth, because the decreased upper plate thickness impeded the increase of the tensile shear load. That of CTP, however, rapidly increased with increasing tool penetration depth to produce a maximum tensile shear load of 4.6 kN. CTP, with its shoulder comprising a slight, broad projection, retarded the vertical joint deformation and produced good mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Pin Shapes on Joint Characteristics of Friction Stir Spot Welded AA5J32 Sheet

et al. 2010

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“…24) In the present study, the bond width of P2.5-series lap-joints (as shown in Fig. 4(a) and (b)) is recognized as a region of grain refining with fully metallurgical bond according to the definition of previous study, 13) but the obvious lap-sheets interface represents that there is almost no contact away from the bond region. Besides, an apparent microcrack is observed close to the HAZ/TMAZ interface as shown in Fig.…”

Section: Resultsmentioning

confidence: 52%

“…5(b)) than the P1.0-105s. Properly welded joints should have high failure load, display ductility and failed by tear-out of a large section of the joined interface, 13) whereas poorly welded joints with low failure load will fail in a brittle manner at the welding region. To distinct the fracture modes observed from the tensile shear testing of FSSW lap-joined specimens, Fig.…”

Section: Microstructural Variations Affect the Failure Load Data Flucmentioning

confidence: 99%

“…6,7,10,11) Since the failure of FSSW-joined structural components depends on the stress to approach a critical weakest link of the welding spot, the variability of failure strength is fairly correlated with the welding qualities of joints, including microstructural homogeneity, bond formation and bond width. [12][13][14] However, few current reports focus on assessing the failure mechanism of FSSW aluminum alloys under mechanical loading for various probe penetration depth. Furthermore, the effect of microstructural feature on failure probability and joining reliability of FSSW lap-joints still needs further investigation through a statistical examination.…”

Section: Introductionmentioning

confidence: 99%

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Weibull Statistics for Evaluating Failure Behaviors and Joining Reliability of Friction Stir Spot Welded 5052 Aluminum Alloy

et al. 2009

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Friction stir spot welding (FSSW) was applied to make lap-joints of 5052 rolled (5052-R) aluminum alloys. The resulting microstructural observation, microhardness, tensile shear failure load and failure morphologies are reported, including a brief look into failure behaviors in the present study. The metallurgical bonded TMAZ region with a plastic metal flow is obviously created around the probe, and the microhardness is significantly increased at the TMAZ region for FSSW-joined 5052 aluminum alloys. The FSSW lap-joints with an obvious metallurgical bonded TMAZ region generally display a higher failure load and ductile failure morphologies with dimples fracture. In addition, the failure load of FSSW lap-joints was increased with increasing the probe penetration depth and the welding time. Based on the data fluctuation of tensile shear failure load, the Weibull model provided a statistical analysis method for assessing the minimum failure, the failure mechanism and the joining reliability for the FSSW lap-joints. Through the statistical analysis of the Weibull distribution function, FSSW-joined aluminum alloys with a wear-out failure model are recognized as reliable lap-joints for further engineering application.

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“…However, there have been reports of the threaded pin tool causing a decrease in the joint's volume and upper plate's thickness, owing to the deep tool penetration. 23,24) Moreover, using the conventional tool, pin hole inevitably remains at the centre of the weld nugget. It is believed that corrosion could take place preferentially at the pin hole because rainwater remains in the hole, where body paint barely reaches the bottom.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Friction Stir Spot Welded Galvanized Steel

et al. 2010

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Joints of galvanized steel were obtained by friction stir spot welding (FSSW) with lap configuration using CPS design tool. No mechanically mixed layer was formed between the top and bottom plates at the weld nugget due to the limited tool penetration and the lower pin height of the welding tool than the steel plate thickness. A deformed region, in which ZnO particles were detected, was observed in the joint. The formation of this deformed region was attributed to the explosion of the Zn coating layer due to friction heating and tool compression. With increasing tool penetration depth, the tensile shear strength of the joint increased to a maximum value of 3.07 kN at a tool penetration depth of 0.52 mm.

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Structure–properties relations in spot friction welded (also known as friction stir spot welded) 6111 aluminum

Cited by 135 publications

References 21 publications

Effect of Pin Shapes on Joint Characteristics of Friction Stir Spot Welded AA5J32 Sheet

Effect of Pin Shapes on Joint Characteristics of Friction Stir Spot Welded AA5J32 Sheet

Weibull Statistics for Evaluating Failure Behaviors and Joining Reliability of Friction Stir Spot Welded 5052 Aluminum Alloy

Microstructure and Mechanical Properties of Friction Stir Spot Welded Galvanized Steel

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