Investigation into the Dissimilar Friction Stir Welding of AA5052 and AA6061 Aluminum Alloys Using Pin-Eccentric Stir Tool

Chen, Yu; Wang, He; Li, Huaying; Wang, Xiaoyu; Ding, Hua; Zhao, Jingwei; Zhang, Fenghe

doi:10.3390/met9070718

Cited by 19 publications

(15 citation statements)

References 36 publications

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“…The grain morphologies of TMAZ are different at AS and RS, the TMAZ at AS is featured by the elongated and bended grains (Figure 9a,c), while it is dominated by the coarse and equiaxed grains in the TMAZ at RS (Figure 9b,d). The above differences might be caused by the asymmetric welding temperature distribution and material flow between AS and RS [24]. Furthermore, compared with C-FSW, the lower welding heat input of S-FSW results in finer grains in the TMAZ.…”

Section: The Microstructures Of Fsw Fointsmentioning

confidence: 99%

A Comparative Investigation on Conventional and Stationary Shoulder Friction Stir Welding of Al-7075 Butt-Lap Structure

Chen

Wang

et al. 2019

Metals

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Both conventional friction stir welding (C-FSW) and stationary shoulder friction stir welding (S-FSW) were employed to join the Al-7075 butt-lap structure, then the microstructural evolution and mechanical characterization of all FSW joints were systematically studied. The C-FSW joint exhibited a rough surface with flashes and arc corrugations, while the surface of the S-FSW joint became smooth. Moreover, for the S-FSW joint, the shoulder-affected zone got eliminated and the material flow mode during FSW was changed owning to the application of stationary shoulder. Furthermore, in comparison to C-FSW, the lower welding heat input of S-FSW decreased the average grain size in the nugget zone and inhibited the coarsening of strengthening precipitates in the heat-affected zone, elevating the overall hardness for the S-FSW joint. In addition, the tensile strength of the S-FSW joint became higher compared to the C-FSW joint, and all the FSW joints failed inside the nugget zone attributing to the existence of hook defect. The sharp-angled hook defect deteriorated the plasticity of the C-FSW joint further, which was only 70% that of the S-FSW joint.

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Section: The Microstructures Of Fsw Fointsmentioning

confidence: 99%

A Comparative Investigation on Conventional and Stationary Shoulder Friction Stir Welding of Al-7075 Butt-Lap Structure

Chen

Wang

et al. 2019

Metals

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“…In addition, they suggested the tool with eccentricity would incorporate more material flow towards AS. However, Chen et al 55 noticed the formation of internal defects and zigzag lines in the SZ when placed softer material of dissimilar combination towards AS. By employing tool eccentricity, improved mechanical properties at softer SZ were noticed which was due to the occurrence of dynamic recrystallization and over-ageing.…”

Section: Operating Parametersmentioning

confidence: 99%

Friction stir welding of dissimilar alloy combinations—A Review

ShivaKumar

Rajamurugan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Friction stir welding (FSW) is one among solid-state welding processes that can be employed for producing joints between dissimilar combinations with more ease than that of fusion welding processes. Several high coupled physical phenomena have addressed FSW as an extremely complex process. It is around three decades of invention, optimization of the parameters have been carried out even today by many researchers all over the world to obtain sound joints. This article focuses mainly on the research developments in the dissimilar FSW (DFSW), with the factors that are involved in joint fabrication between dissimilar materials. From the literature, it is found that the most influential factors in deciding the quality of the joints are pin profile, shoulder shape, welding speed and tool rotational speed. In addition, all other parameters will provide incremental support to it. The study on microstructure in different zones and the mechanical properties of welded specimens are elaborated from the available literature. Special attention is given to the reinforcement of micro- and nano- sized solid particles in the DFSW process. Future studies of DFSW are discussed based on the untracked studies that are not available in the literature.

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“…In a previous study, dissimilar Al alloy welding was performed using the FSW technique with several eccentric tools, which yielded a maximum tensile strength (5% increase) using a 0.8 mm pin due to the enhanced grain edges. The maximum eccentric tool pin delivers high hardness by improving the grain structure of the weld nugget zone and enlarging the boundary [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Corrosion Behavior of Friction-Stir-Welded Dissimilar Aluminum Alloys

et al. 2021

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The fuel consumption of high-density automobiles has increased in recent years. Aluminum (Al) alloy is a suitable material for weight reduction in vehicles with high ductility and low weight. To address environmental problems in aircraft and maritime applications, in particular rust development and corrosion, the current study assesses the corrosion behavior during friction stir welding (FSW) of two dissimilar Al alloys (AA6061 and AA8011) in various corrosive conditions using salt spraying and submersion tests. Two acidic solutions and one alkaline solution are used in these tests, which are performed at room temperature. The two specimens (AA6061 and AA8011) and the weld region are suspended in a salt spraying chamber and a 5 wt.% NaCl solution is continually sprayed using the circulation pump for 60 h, with the specimens being weighed every 15 h to determine the corrosion rates. According to the salt spraying data, the weld zone has a higher corrosion resistance than the core components. For twenty-eight days, individual specimens are submerged in 3.5 wt.% HCl + H2O and H2SO4 + H2O solutions and seawater. The weld area specimens exhibit stronger corrosion resistance than the base material specimens, and weight loss in the saltwater medium is lower when compared to the other test solutions, according to the corrosion analysis. The scanning electron microscope (SEM) analysis demonstrates that the base metal AA8011 is considerably corroded on its surface.

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Investigation into the Dissimilar Friction Stir Welding of AA5052 and AA6061 Aluminum Alloys Using Pin-Eccentric Stir Tool

Cited by 19 publications

References 36 publications

A Comparative Investigation on Conventional and Stationary Shoulder Friction Stir Welding of Al-7075 Butt-Lap Structure

A Comparative Investigation on Conventional and Stationary Shoulder Friction Stir Welding of Al-7075 Butt-Lap Structure

Friction stir welding of dissimilar alloy combinations—A Review

Assessment of the Corrosion Behavior of Friction-Stir-Welded Dissimilar Aluminum Alloys

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