Development of ceramic backing for friction stir welding and processing

Santos, Tiago Felipe de Abreu; Ea, Torres; Hermengildo, Tahiana F. C.; Ramírez, Antonio J.

doi:10.1080/09507116.2015.1096498

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…The joints were produced using ceramic backing [31]; however, to demonstrate the complete material flow, joints were made using a 5052-aluminum backing. Table 1 displays the variables and parameters used in the welding process.…”

Section: Methodsmentioning

confidence: 99%

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Graciano-Uribe

Santos

2021

IJE

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In the last thirty years, the friction stir welding (FSW) process has achieved significant importance due to the satisfactory results derived from severe deformation and low heat input during the welded joint production. These elements have been considered to implement the FSW in different welded systems, including aluminum-steel joints. In these dissimilar joints, the main interest was to obtain a welded joint with acceptable mechanical behavior. Some papers recently focused on understanding dissimilar joints process, mainly on the metal flow and its response to corrosion. However, in Al-steel joints, the presence of steel particles in the nugget zone is routine, it alters both the mechanical and chemical behavior of welded joints. Thus, this work aims to evaluate the mechanisms that govern these particles' generation, the effect of offset on their formation, and proposing the material flow behavior, using the detached fragments as tracers. It was established that the offset controls the metal's fluidity, which allows the accumulation of steel fragments on the advanced side, and reducing its quantity, due to the decrease of irregularities in the Al-steel interface. Likewise, the metal flow was observed on the retreating side, with that mentioned in aluminum joints. In contrast, on the advanced side, there is a shear action, push down, and lateral movement towards the retreating side, driven by the high forging strength of the metal and the restriction imposed by the steel and the backing.

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Section: Methodsmentioning

confidence: 99%

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Graciano-Uribe

Santos

2021

IJE

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“…FSW involves a nonconsumable rotating tool, with high mechanical strength, which consists of a cylindrical shoulder and a pin. The tool generates heat by friction, being able to plasticize the material that will be later deformed, promoting the mechanical mixing of the materials involved and allowing the consolidation of the welded joint and its full penetration [61]. This technology permits the joining of materials in the solid state, avoiding fusion and formation of deleterious defects [51].…”

Section: Introductionmentioning

confidence: 99%

Effect of the energy input on the microstructure and mechanical behavior of AA2024-T351 joint produced by friction stir welding

Vale

Santos

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Butt joints of AA2024-T351, with 6 mm thickness, were friction-stir-welded. The objective was to investigate the effects of the energy input on the microstructure and mechanical properties of the joints. The welded joints were tested employing a Mo-Va tool, with shoulder and pin diameter of 15 and 6 mm, respectively. The parameters were selected according to visual inspection of the welds, bending test, and microstructural analysis. Constant values of rotational speed and axial force were employed: 1000 rpm and 13 kN, respectively. The welding speed varied from 3 to 6 mm/s. Temperature measurements were performed along the welding process, analysis by optical microscope, microhardness, and bending tests. The process parameters selected resulted in butt joints with good characteristics, no microvoids, and full penetration. The base metal presented mainly S-type compounds, while in the HAZ thickening and loss of coherence of this precipitates are found. A more refined microstructure was found in the stir zone, based on the CDRX mechanism, with evidences of GDRX in the SZ/TMAZ (AS). As far away from the weld the indentation line is, lower is the hardness of the stir zone. The joints presented a similar increase in the mechanical resistance, with loss in ductility.

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Effect of high anodic polarization on the passive layer properties of superduplex stainless steel friction stir welds at different chloride electrolyte pH values and temperatures

Santa-Cruz

Machado

Vicente

et al. 2019

Int J Miner Metall Mater

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Development of ceramic backing for friction stir welding and processing

Cited by 5 publications

References 27 publications

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Effect of the energy input on the microstructure and mechanical behavior of AA2024-T351 joint produced by friction stir welding

Effect of high anodic polarization on the passive layer properties of superduplex stainless steel friction stir welds at different chloride electrolyte pH values and temperatures

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