Friction Stir Welds of Al Alloy-Cu: An Investigation on Effect of Plunge Depth

Wahid, Mohd Atif; Siddiquee, Arshad Noor; Khan, Zahid A.; Asjad, Mohammad

doi:10.1515/meceng-2016-0035

Cited by 31 publications

(10 citation statements)

References 19 publications

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“…For a defect-free joint, fracture locations are a measure of hardness distribution. 27 In the present study, the tensile sample fracture took place in the TMAZ/HAZ at the AS of the weld corresponding to the minimum hardness location. The fractograph (Figure 11) of the joints showed mixed-type fracture consisting of ductile fracture feature and grain boundary segregation.…”

Section: Resultsmentioning

confidence: 94%

Analysis of process parameters effects on underwater friction stir welding of aluminum alloy 6082-T6

Wahid

Khan

Siddiquee

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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In friction stir welding of heat treatable aluminum alloys, the thermal cycles developed during the joining process result in softening of the joints which adversely affect their mechanical properties. Underwater friction stir welding can be a process of choice to overcome this problem due to low peak temperature and short dwell time involved during the process. Consequently, this article presents a study pertaining to the underwater friction stir welding of aluminum alloy 6082-T6 with an aim to develop a mathematical model to optimize the underwater friction stir welding process parameters for obtaining maximum tensile strength. The results of the study reveal that the tool shoulder diameter (d), tool rotational speed (ω), welding speed (v), and second-order term of rotational speed, that is, ω2, significantly affect the tensile strength of the joint. The maximum tensile strength of 241 MPa which is indeed 79% of the base metal strength and 10.7% higher than that of conventional (air) friction stir welding joint was achieved at an optimal setting of the underwater friction stir welding parameters, that is, tool rotational speed of 900 r/min, the welding speed of 80 mm/min, and a tool shoulder of 17 mm. The article also presents the results of temperature variation, the macrostructural and microstructural investigations, microhardness, and fractography of the joint obtained at the optimal setting for underwater friction stir welded (UFSWed) joint.

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Section: Resultsmentioning

confidence: 94%

Analysis of process parameters effects on underwater friction stir welding of aluminum alloy 6082-T6

Wahid

Khan

Siddiquee

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

Self Cite

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“…Earlier studies suggest that tool rotation speed, tool traverse speed (welding speed), and tool profile (shoulder diameter, pin profile) are process parameters that have the highest impact on friction stir welding (Palani et al, 2018a;2018b;Nandan et al, 2008;Ghetiya et al, 2016;Davidson and Neelakrishnan, 2018;Wahid et al, 2016;Vaira Vignesh et al, 2018a;2018b;2017). In this study, aluminum alloy AA8011 is friction stir welded by varying the friction stir welding process parameters, namely tool rotation speed, welding speed, and tool shoulder diameter.…”

Section: Introductionmentioning

confidence: 93%

“…In friction stir welding, a non-consumable rotating tool is traversed along the joint line of the plates being welded by the action of the axial force (Midling et al, 1998;Wahid et al, 2016). The traverse of the rotating tool under normal load generates frictional heat, which plasticizes the material and enables the creation of a sound joint in the plasticized state (Vaira Vignesh et al, 2016;.…”

Section: Introductionmentioning

confidence: 99%

Examination of the Mechanical, Corrosion, and Tribological Behavior of Friction Stir Welded Aluminum Alloy AA8011

et al. 2021

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Aluminum alloy AA8011 is emerging as a promising material for modern engineering applications in which improved tensile strength, hardness, corrosion-resistance, and wear-resistance of materials are required. Typically, AA8011 alloys are utilized in air-conditioning ducts and heat exchanger fins in ships, leisure boats, luxury vessels, workboats, fishing vessels, and patrol boats. However, the conventional welding of AA8011 is a challenging procedure. In this context, this paper focuses on the development of an effective solid-state welding methodology for AA8011 alloy welding. The AA8011 alloy was friction stir welded by varying the tool rotation speed, traverse speed, and shoulder diameter. The microhardness, tensile strength, joint efficiency, elongation, corrosion rate, and wear rate of the friction stir welded specimens were compared with the base material. Fractography analysis was conducted after the tensile test and surface morphology analysis after corrosion and wear tests, using scanning electron microscopy. The compositional elements in the corroded and worn section of the specimens were analyzed using energy-dispersive X-ray spectroscopy. Based on the joint efficiency as a primary constraint, the optimum process parameters for friction stir welding of aluminum alloy AA8011 have been established as follows: tool rotation speed of 1200 rpm, tool traverse speed of 45 mm/min, and tool shoulder diameter of 21 mm.

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“…HAZ is a common characteristic of all thermal welded joints, influenced by the heat input, affecting the microstructure and mechanical properties. Both the HAZ and TMAZ are known as the transition region in the FSW weld structure, situated between the SZ and the BM [32].…”

Section: Dissimilar Joints: Soft Materialsmentioning

confidence: 99%

Characterization of Dissimilar Al-Cu BFSW Welds; Interfacial Microstructure, Flow Mechanism and Intermetallics Formation

Tamadon

Abdali

Pons

et al. 2020

Advances in Materials Science

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The purpose of this study is to elucidate the flow features of the dissimilar Al-Cu welded plates. The welding method used is Bobbin Friction Stir Welding (BFSW), and the joint is between two dissimilar materials, aluminium alloy (AA6082-T6) and pure copper. Weld samples were cut from along the weld line, and the cross-sections were polished and observed under an optical microscope (OM). Particular regions of interest were examined under a scanning electron microscope (SEM) and analysed with Energy Dispersive X-ray Spectroscopy (EDS) using the AZtec software from Oxford Instruments. The results and images attained were compared to other similar studies. The reason for fracture was mainly attributed to the welding parameters used; a higher rotational speed may be required to achieve a successful BFSW between these two materials. The impact of welding parameters on the Al-Cu flow bonding and evolution of the intermetallic compounds were identified by studying the interfacial microstructure at the location of the tool action. The work makes an original contribution to identifying the solid-phase hybrid bonding in Al-Cu joints to improve the understanding of the flow behaviours during the BFSW welding process. The microstructural evolution of the dissimilar weld has made it possible to develop a physical model proposed for the flow failure mechanism.

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Friction Stir Welds of Al Alloy-Cu: An Investigation on Effect of Plunge Depth

Cited by 31 publications

References 19 publications

Analysis of process parameters effects on underwater friction stir welding of aluminum alloy 6082-T6

Analysis of process parameters effects on underwater friction stir welding of aluminum alloy 6082-T6

Examination of the Mechanical, Corrosion, and Tribological Behavior of Friction Stir Welded Aluminum Alloy AA8011

Characterization of Dissimilar Al-Cu BFSW Welds; Interfacial Microstructure, Flow Mechanism and Intermetallics Formation

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