Modified friction stir clinching of 2024-T3 to 6061-T6 aluminium alloy: Effect of dwell time and precipitation-hardening heat treatment

Paidar, Moslem; Tahani, Khashayar; Vignesh, R. Vaira; Ojo, Olatunji Oladimeji; Ezatpour, H.R.; Moharrami, A.

doi:10.1016/j.msea.2020.139734

Cited by 47 publications

(7 citation statements)

References 32 publications

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“…This case is compared with one in which AA6061-T6 aluminum alloy is selected as the advancing material and AA2024-T3 as the retreating material. The rotation speed is set at 800 rev/min, and the transverse speed is 150 mm/min, in accordance with previous experiments on FSW [14,48,49]. A Flir TG297 type infrared thermometer is used to capture the temperatures in the FSW experiment.…”

Section: Methodsmentioning

confidence: 99%

Subregion Based Prediction of Residual States in Friction Stir Welding of Dissimilar Metals

Zhang,

Wang,

Liu

et al. 2023

Coatings

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Mechanical property changes in friction stir welding can directly affect the rebalance of the stress field in friction stir welding. This means that it reveals a high relevance with the residual states of friction stir welding. Here, we propose a subregion model in which the mechanical property changes are considered to predict the residual states in friction stir welding of dissimilar metals. Results indicate that the accuracy of the predicted distortion can be greatly increased when the different mechanical properties are considered in friction stir welding of 2024-T3 and 6061-T6. The final mechanical property is determined by the mixture of the materials at retreating and advancing sides. The final mechanical property in the stirring zone can be increased to 171 MPa for yield strength and 194 MPa for tensile strength when the strength of the advancing side material is higher. The shrinkage of material in the stirring zone during the cooling stage is the key reason for the formation of the tensile residual stress and the V-shape distortion on the cross-section in the as-weld state.

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Section: Methodsmentioning

confidence: 99%

Subregion Based Prediction of Residual States in Friction Stir Welding of Dissimilar Metals

Zhang,

Wang,

Liu

et al. 2023

Coatings

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“…Tunneling defects [ 13 ] and kissing bonds [ 14 ] are the most prevalent imperfections reported for FSWed joints. Accordingly, kissing bonds reduce fatigue life with a minor impact on the tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Comparative Insight into the Interfacial Phase Evolutions during Solution Treatment of Dissimilar Friction Stir Welded AA2198-AA7475 and AA2198-AA6013 Aluminum Sheets

et al. 2021

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In the current research, dissimilar friction stir welded (FSW) sheets of AA2198-AA7475 and AA2198-AA6013 were solution treated at 460–580 °C for 1 h. Annealing at 580 °C led to complete degradation of both dissimilar weldments from the AA2198 side. According to the microstructure inspection, solution treatment triggered abnormal grain growth within the stir zone (SZ), and applying higher treatment temperatures enhanced the fraction of transformed grains. SEM analysis revealed that the pre-melting of grain boundaries (GBs) over 540 °C encouraged the diffusion of solute atoms to the GBs. The massive diffusion of Cu to the GBs led to the formation of Cu-rich eutectic phases in AA7475 and AA2198 and dense Cu-rich particles in AA6013. In the meantime, the diffusion of Mg and Zn to the GBs of AA7475 and Fe and Si to the GBs of AA6013 eventuated in the formation of coarse particles at the GBs which, in return, attenuated the bonding adhesion of the grains at SZ. The formation of remarkable Cu-rich phases in the pre-melted regions and significant contraction of the eutectic phase while cooling as well as the formation of particles at GBs resulted in intergranular failure of the joints from the AA2198 side of the SZ.

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“…Additionally, Paidar et al [9][10][11] investigated the modified friction stir clinching to solve the clinch-ability problems of the low-ductility dissimilar aluminium alloys.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the tensile shear strength for joining low-ductility aluminium to high-strength steel by using electrically-assisted mechanical clinching (EAMC)

Barimani-Varandi

Aghchai

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The present work studied the enhancement of the tensile shear strength for joining AA6061-T6 aluminium to galvanized DP590 steel via electrically-assisted mechanical clinching (EAMC) using an integrated 2D FE model. To defeat the difficulties of joining low-ductility aluminium alloy to high-strength steel, the electroplastic effect obtained from the electrically-assisted process was applied to enhance the clinch-ability. For this purpose, the results of experiments performed by the chamfering punches with and without electrically-assisted pre-heating were compared. Joint cross-section, failure load, failure mode, fracture displacement, material flow, and failure mechanism were assessed in order to study the failure behaviour. The results showed that the joints clinched at the EAMC condition failed with the dominant dimpled mechanism observed on the fracture surface of AA6061 side, achieved from the athermal effect of the electroplasticity. Besides, these joints were strengthened 32% with a much more fracture displacement around 20% compared with non-electrically-assisted pre-heating.

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Modified friction stir clinching of 2024-T3 to 6061-T6 aluminium alloy: Effect of dwell time and precipitation-hardening heat treatment

Cited by 47 publications

References 32 publications

Subregion Based Prediction of Residual States in Friction Stir Welding of Dissimilar Metals

Subregion Based Prediction of Residual States in Friction Stir Welding of Dissimilar Metals

Comparative Insight into the Interfacial Phase Evolutions during Solution Treatment of Dissimilar Friction Stir Welded AA2198-AA7475 and AA2198-AA6013 Aluminum Sheets

Enhancement of the tensile shear strength for joining low-ductility aluminium to high-strength steel by using electrically-assisted mechanical clinching (EAMC)

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