Investigations on Microstructural Evolutions and Mechanical Properties of Dual-Phase 600 Steel and AA6082-T6 Aluminum Alloy Dissimilar Joints Fabricated by Friction Stir Welding

“…During the tensile test, fracture location was moved from the steel parent metal to the interface with weld bead, with fracture load reduced to 6.3 kN. Sameer et al [54] investigated the effect of rotational speed, welding speed, and tool offset on the microstructure and mechanical properties of FSW joints of AA 6082-T6 and DP-600 steel. This study confirmed that low heat inputs (i.e., low rotational and welding speed) promote the formation of voids.…”

Section: Voidsmentioning

confidence: 99%

“…Tensile strength of defective and sound FSW joints of AA 6082-T6 and DP-600 steel (Reproduced from[54], with permission from Springer Nature, 2018).…”

mentioning

confidence: 99%

Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets

Safeen

Spena

2019

Metals

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Joining of aluminum alloys through friction stir welding (FSW) is effectively employed in several industries (e.g., aeronautics and aerospace) since it guarantees proper weld strength as compared to other joining technologies. Contrarily, dissimilar FSW of aluminum alloys and steels often poses important issues in the selection of welding parameters due to the difficulty to join different materials. Improper welding parameters give rise to the formation of intermetallic compounds, and internal and external defects (e.g., tunnel formation, voids, surface grooves, and flash). Intermetallic compounds are brittle precipitates of Al/Fe, which chiefly initiate crack nucleation, whereas internal and external defects mainly act as stress concentration factors. All these features significantly reduce joint strength under static and dynamic loading conditions. With reference to the literature, the influence of main welding parameters (rotational speed, welding speed, tool geometry, tilt angle, offset distance, and plunge depth) on the formation of intermetallic compounds and defects in FSW of aluminum alloys and steels is discussed here. Possible countermeasures to avoid or limit the above-mentioned issues are also summarily reported.

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“…They concluded that the TRS of 1200 rpm, WS of 30 mm/min, and tool of cylindrical threaded pin profile with shoulder diameter of 16 mm provide the optimal results of UTS of 245 MPa. Sameer and Birru [8] discussed the FSW between dual-phase 600 steel grade and AA6082-T6 using tungsten carbide tool by considering various TRS, WS, tool offsets, and constant TTA to study the macrostructure, microstructure, UTS, and microhardness of welded joints. They concluded that the highest UTS and joint efficiency obtained were 240 MPa and 85% respectively at the TRS of 710 rpm, WS of 40 mm/min, TTA of 0.5°, and tool pin offset of 1.3 mm.…”

Section: Introductionmentioning

confidence: 99%

Examination and Optimization of Friction Stir Welding Process Parameters of AA6092 Alloys

Jamaludeen

2024

Soldag. insp.

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In this present examination, AA6092 alloys are friction-stir welded at various welding conditions to develop a welded joint with optimal ultimate tensile strength (UTS) and microhardness. This work deals with replacement of application of AA6061 alloys as bumper and bonnet by means of AA6092 alloys and this alloys tensile strength and microhardness is further increased by performing friction stir welding. This study investigates the performance of the friction stir welded butt joints of AA6092 alloys by varying the FSW process parameters such as tool rotational speed (TRS), welding speed (WS), axial load (AL), tool tilt angle (TTA), tool pin profile (TPP), shoulder diameter (SD), etc. In the current investigation, the empirical relationships are developed between most contributing FSW process parameters (TRS, WS, and AL) and their output responses (UTS and weld nugget microhardness (WNH)). The optimal UTS and WNH is predicted by the desirability approach of response surface methodology (RSM). The conforming values of input FSW process parameters are TRS of 1451.67 rpm, WS of 42.22 mm/min, and AL of 5.29 kN. For the existing examination, calculated UTS and WNH are 465.6 MPa and 151.8 HRB respectively, and the results of validation experiments are also invariable with these values.

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Investigations on Microstructural Evolutions and Mechanical Properties of Dual-Phase 600 Steel and AA6082-T6 Aluminum Alloy Dissimilar Joints Fabricated by Friction Stir Welding

Cited by 16 publications

References 43 publications

Effect of Tool Transverse Speed and Pin Offset on the Properties of Friction Stir Welding Al6061-St52 Dissimilar Joint

Effect of Tool Transverse Speed and Pin Offset on the Properties of Friction Stir Welding Al6061-St52 Dissimilar Joint

Main Issues in Quality of Friction Stir Welding Joints of Aluminum Alloy and Steel Sheets

Examination and Optimization of Friction Stir Welding Process Parameters of AA6092 Alloys

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