Conventional and swing friction stir spot welding of aluminum alloy to magnesium alloy

Wu, Siyu; Sun, Tao; Shen, Yifu; Yan, Yinfei; Ni, Ruiyang; Liu, Wenming

doi:10.1007/s00170-020-06548-4

Cited by 20 publications

(11 citation statements)

References 31 publications

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“…According to the literature, the emergence of peak D is due to the fact that the lattice is far away from the center of Brillouin region, indicating that oxygen‐containing groups such as carboxyl group, hydroxyl group and epoxy group exist in GO. The G peak is the main spectral feature of graphene‐like materials, which is generated by the movement of carbon atoms in a flat surface 21,22 . At the same time, we can observe that GO and PEG peaks appear simultaneously in the Raman spectrum of GO‐PEG materials, which can also prove that GO and PEG have been completely hybridized and mixed together.…”

Section: Resultsmentioning

confidence: 61%

“…The G peak is the main spectral feature of graphenelike materials, which is generated by the movement of carbon atoms in a flat surface. 21,22 At the same time, we can observe that GO and PEG peaks appear simultaneously in the Raman spectrum of GO-PEG materials, which can also prove that GO and PEG have been completely hybridized and mixed together.…”

Section: Xps and Ft-ir Analysesmentioning

confidence: 57%

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Tribological properties of graphene oxide and polyethylene glycol composites under dry friction and oil lubrication conditions

Wang

et al. 2021

J of Applied Polymer Sci

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In the low speed and heavy load of large machinery rotation or sliding parts, the application of copper base ink plate is very extensive. In this study, the graphene oxide‐polyethylene glycol (GO‐PEG) thin films were prepared on the surface of steel plates by gradient heating, and we simulated the friction and wear state of the solid material when it was brought to the metal surface. And the Fourier transform infrared spectroscopy, X‐ray diffraction, X‐ray energy spectrum analysis, Raman spectroscopy (Raman), and thermogravimetric analysis were used to characterize the structure and properties. The tribological results show that the GO‐PEG composite film prepared by gradient temperature rise method has good lubrication effect. The addition of GO greatly enhances the mechanical properties of the composite films. Compared with the single GO film, the friction coefficient is reduced by 50% and the wear rate is reduced by 85%. The unique characteristics of PEG solved the accumulation phenomenon caused by the strong van der Waals force between GO, then the PEG adhered on GO surfaces caused good lubrication effect. At the same time, the composite film has a broad application prospect in the working environment with little oil and no oil.

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Section: Resultsmentioning

confidence: 61%

Section: Xps and Ft-ir Analysesmentioning

confidence: 57%

Tribological properties of graphene oxide and polyethylene glycol composites under dry friction and oil lubrication conditions

Wang

et al. 2021

J of Applied Polymer Sci

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“…Cases with a larger fracture load exhibited a larger displacement at fracture initiation, which is the general trend observed in the literature. 32 The joint fabricated at 750 rpm exhibited a larger displacement at fracture initiation compared to the other cases. The evolution of the lap shear load was slightly different at 557 rpm, as there was a sudden decrease in the load after fracture initiation.…”

Section: Resultsmentioning

confidence: 90%

Friction stir spot welding of dissimilar quality galvanized steel sheets meant for automotive applications using a consumable sheet

Gupta

Das

Narayanan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Friction stir spot welding (FSSW) is a solid-state spot-joining method used to join aluminum alloys to other materials for fabricating lightweight components. However, the FSSW tool experiences wear and tear during the spot welding of steel-grade sheets. To overcome this problem, in the present work, friction stir spot welding using a consumable sheet (FSSW-C) is proposed, in which the tool does not contact the steel sheet during the entire welding cycle. The main aim of this study is to investigate the application of FSSW-C to dissimilar galvanized steel sheets at various rotational speeds via lap shear tests and examination of the joint macro/microstructures. The lap shear performance was also compared to that of the Self Pierce Rivet (SPR) joint. The results revealed that galvanized steel sheets were successfully spot welded using FSSW-C with a lap shear fracture load of 1.5 kN–2.2 kN, which is approximately 50% of that of SPR joints. The microstructures revealed important features, including microstructural zones such as the stir zone, thermomechanically-affected zone, and heat-affected zone. Intermetallic compound formation was not observed at the joint interface. As the rotational speed increased, the axial force and torque decreased, whereas the temperature increased during FSSW-C. The energy generated increased with an increase in the rotational speed and was significantly different when compared to the data for conventional FSSW.

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“…The relationship between the average recrystallization grain size (d) and the Zener-Hollomon parameter (Z) during dynamic recrystallization is given by -lnd= A + Bln Z. Based on the present TC-ECAE process with extrusion temperature 400℃,average accumulative strains, strain rates and Z parameters of the AZ61 increase with the development of TC-ECAE process [21][22][23]. It can be found that the accumulative strains increase with the extrusion advancing, so the grains will be re ned consequently.…”

Section: Pridiction Microstructure Evolutions During Tc-ecae Processmentioning

confidence: 98%

A New Method of Manufacturing Thin-Walled Tube Made of AZ61 Magnesium Alloy Including Direct Extrusion And Corrugated Equal Channel Angular Extrusion

Zhang

et al. 2021

Preprint

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Due to demand of strong toughness of thin walled tube, and good secondary forming properties and high-precision dimension, New plastic forming method should be researched to achieve a complete filling, uniform deformation and microstructure evolution during forming process.To obtain the deformation mechanisms of a new composite extrusion for thin walled tube fabricated by tube corrugated equal channel angular extrusion has been researched which is shorten as “TC-ECAE” in this paper. Finite element DEFORMTM-3D software to investigate the plastic deformation behavior of magnesium billet during TC-ECAE process has been employed. Computed parameters including workpiece material characteristics and process conditions have been taken into consideration. The pridictions of strains distributions and damage distributions and effective stress distributions and flow velocities distributions and microstructures evolutions have been explored. The results proved that the TC-ECAE process is a forming method for magnesium alloy tube which is suitable for large scale industrial application. The TC-ECAE process would cause serve plastic deformation and improve the dynamic recrystallization of magnesium alloy during TC-ECAE process.

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Conventional and swing friction stir spot welding of aluminum alloy to magnesium alloy

Cited by 20 publications

References 31 publications

Tribological properties of graphene oxide and polyethylene glycol composites under dry friction and oil lubrication conditions

Tribological properties of graphene oxide and polyethylene glycol composites under dry friction and oil lubrication conditions

Friction stir spot welding of dissimilar quality galvanized steel sheets meant for automotive applications using a consumable sheet

A New Method of Manufacturing Thin-Walled Tube Made of AZ61 Magnesium Alloy Including Direct Extrusion And Corrugated Equal Channel Angular Extrusion

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