Insights into the microstructure evolution and mechanical behavior of dissimilar friction stir welded joints of additively manufactured AlSi10Mg and conventional 7075-T651 aluminum alloys

Minhas, Navdeep; Sharma, Varun; Manda, Sanjay; Thakur, Ankit

doi:10.1016/j.msea.2023.145407

Cited by 13 publications

(1 citation statement)

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“…No matter whether using the same or different aluminum alloy, the relationship between defects and the mechanical properties of joints can be determined by optimized welding parameters and the selection of welding tool size [24]. However, for the RFSSW of dissimilar aluminum alloys, the mechanical properties are different due to the different initial compositions [25]. Therefore, appropriate welding and tool parameters are very important for obtaining excellent structure and performance of dissimilar aluminum alloy joints.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Refill Friction Stir Spot-Welded Joints of 2A12Al and 7B04Al: Effects of Tool Size and Welding Parameters

Wang,

Li,

Jiang

et al. 2024

Materials

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To solve problems in dissimilarly light metal joints, refilled friction stir spot welding (RFSSW) is proposed instead of resistance spot welding. However, rotation speed, dwell time, plunge depth, and the diameter of welding tools all have a great influence on joints, which brings great challenges in optimizing welding parameters to ensure their mechanical properties. In this study, the 1.5 mm thick 2A12Al and 2 mm thick 7B04Al lap joints were prepared by Taguchi orthogonal experiment design and RFSSW. The welding tool (shoulder) diameters were 5 mm and 7 mm, respectively. The macro/microstructures of the cross-section, the geometrical characteristics of the effective welding depth (EWD), the stir zone area (SZA), and the stir zone volume (SZV) were characterized. The shear strength and failure mode of the lap joint were analyzed using an optical microscope. It was found that EWD, SZA, and SZV had a good correlation with tensile–shear force. The optimal welding parameters of 5 mm diameter joints are 1500 rpm of rotation speed, 2.5 mm of plunge depth, and 0 s of dwell time, which for 7 mm joints are 1200 rpm, 1.5 mm, and 2 s. The tensile–shear force of 5 mm and 7 mm joints welded with these optical parameters was 4965 N and 5920 N, respectively. At the same time, the 5 mm diameter joints had better strength and strength stability.

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Section: Introductionmentioning

confidence: 99%