Stationary shoulder FSW for joining high strength aluminum alloys

Wu, Hong‐Ke; Chen, Ying Chun; Strong, D. F.; Prangnell, P.B.

doi:10.1016/j.jmatprotec.2015.02.015

Cited by 81 publications

(48 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, Ahmed et al [11] butt-joined Al-6082 using S-FSW and then analyzed the crystallographic texture of the nugget zone (NZ), and they reported that the shoulder-affected zone (SAZ) disappeared and the whole NZ was mainly occupied by the shear texture arisen from the pin. Wu et al [12] stated that, for the butt joint of Al-7075, the welding heat input of C-FSW was about 30% higher in comparison to S-FSW, moreover, the heat-affected zone (HAZ) in the S-FSW joint was narrowed. Li et al [13] friction stir lap welded Al-2024 with a stationary shoulder tool, and found that the application of stationary shoulder not only eliminated the defects in the NZ but also enhanced the lap shear failure strength of the lap joint.…”

Section: Of 12mentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Of 12mentioning

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

View full text Add to dashboard Cite

show abstract

“…Currently, there is a demand for light and resistant products, short manufacturing times, and lower manufacturing costs. In this line, the FSW is an increasingly applied process due to it producing high-strength joints [3] in a wide range of materials and dimensions. FSW's potential is justified for unions in nonferrous alloys with a low melting point, mainly aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Burnishing of FSW Aluminum Al–Cu–Li Components

Rodríguez

Calleja

Lacalle

et al. 2019

Metals

View full text Add to dashboard Cite

Ball-burnishing is presented herein as a mechanical surface treatment for improving mechanical properties after the friction stir welding process. Ball-burnishing provides good surface finish, high compressive residual stresses, and a hardness increase of the surface layer. These characteristics are key for the fatigue life improvement of the component, and for wear resistance due to the higher hardness. This work presents a complete analysis of surface and sub-surface hardness values focusing on the determination of each process parameter influence. Burnishing pressure, radial width, and burnishing direction influence were analyzed. The tested material was 2050 aluminum alloy with two different heat treatments (T3 and T8). The optimum parameters were established, and a complete analysis of the surface hardness was performed. Results show that burnishing is an economical and feasible mechanical treatment for the quality improvement of component surfaces.

show abstract

“…In this work, the joint design, tool features, and clamping system are developed to allow the production of hollow box profiles in AA5754-H22 with a wall thickness of 3 mm. The new concept enables the application of conventional FSW, discarding complex tool architectures such as bobbin tools [12], stationary shoulder tools [13], or using extrusions [14], in the production of free-shape hollow box profiles, i.e., enabling a wide range of aspect ratios for the box shape. One major potential application of the long hollow box profiles is in chassis for buses and coaches [15].…”

Section: Introductionmentioning

confidence: 99%

Production by FSW of free-shape hollow box profile in AA5754 for automotive application

Taavitsainen

Vilaça

Mutanen³

2016

Weld World

View full text Add to dashboard Cite

In automotive industry, the development of a feasible and reliable solution to produce free-shape hollow box profiles in low thickness AA5754, typical in automotive applications, represents an important innovation opportunity. The main challenge is to produce sound welds between thin plates in a corner joint design, when the activation of the FSW joining mechanisms demands application of a significant mechanical energy. The innovation is based on a new clamping system enabling the use of a conventional tool architecture. The innovation enables to produce hollow box profiles in a wide range of aspect ratios. The cross-section dimensions implemented for the test specimens are 100 mm × 50 mm, with a thickness of 3 mm. The thermal history is monitored at strategic positions along the joint. Metallographic analysis of the weld zone includes EBSD and grain size evaluation. The mechanical properties of the joints are assessed via microhardness and a specially designed bending test: corner opening test (COT). The structural behavior of the final profile is tested with a quasi-static crashworthiness test. The results demonstrate the feasibility of the concept, by presenting a sound weld zone. The FSW components clearly overcome the COT and crashworthiness resistance of similar structures welded by TIG.

show abstract

Stationary shoulder FSW for joining high strength aluminum alloys

Cited by 81 publications

References 23 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

Burnishing of FSW Aluminum Al–Cu–Li Components

Production by FSW of free-shape hollow box profile in AA5754 for automotive application

Contact Info

Product

Resources

About