Double-sided friction stir spot welding of ultra-high strength C-Mn-Si martensitic steel by adjustable probes

2022 ◽  
Vol 300 ◽  
pp. 117422
Author(s):  
Xiaopei Wang ◽  
Yoshiaki Morisada ◽  
Kohsaku Ushioda ◽  
Hidetoshi Fujii
Keyword(s):  
Spot Welding ◽  
Martensitic Steel ◽  
High Strength ◽  
Friction Stir Spot Welding ◽  
Friction Stir

scholarly journals Friction Stir Spot Welding with Additional Bonding of Thick Sheet Aluminum Joints

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 732 ◽  
Author(s):  
Marcel Hatzky ◽  
Antonia Frank ◽  
Stefan Böhm
Keyword(s):  
Aluminum Alloys ◽  
Spot Welding ◽  
Sheet Thickness ◽  
High Strength ◽  
Friction Stir Spot Welding ◽  
Glass Beads ◽  
Welding Parameters ◽  
Thick Sheet ◽  
Friction Stir ◽  
Body Construction

The high-strength aluminum alloys offer great potential for realizing lightweight constructions in car body construction. However, the use of aluminum alloys increases the overall thickness of the material, which poses new challenges for potential joining processes. This paper examines a process combination of friction stir spot welding (FSSW) and bonding for 4 mm EN AW 6082-T6 sheets. For the investigations, adhesive or glass beads were applied between the joining components and then the sheets were welded using FSSW. The analysis shows that the adhesive and the glass beads have a very small influence on the joint formation. The use of glass beads in FSSW with bonding is recommended because less adhesive is displaced from the joint area, which increases the joint strength. The target of obtaining high weld spot strengths without strength-reducing adhesive burn-off could not be achieved because a certain residence time is necessary to form a weld spot with high strength at this sheet thickness in order to sufficiently plasticize the material. Adhesive burn-up cannot be completely avoided. For this reason, it is necessary to weigh up which characteristics are required for the specific application and adjust the welding parameters accordingly.

Numerical Simulation of Friction Stir Spot Welding

2016 ◽  
Vol 834 ◽  
pp. 43-48 ◽  
Author(s):  
Marius Adrian Constantin ◽  
Ana Boşneag ◽  
Monica Iordache ◽  
Claudiu Bădulescu ◽  
Eduard Niţu
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Spot Welding ◽  
Frictional Heating ◽  
Three Dimensional ◽  
High Strength Steels ◽  
High Strength ◽  
Friction Stir Spot Welding ◽  
Fe Model ◽  
Friction Stir

Friction Stir Spot Welding (FSSW) is a solid state joining process that relies on frictional heating and plastic deformation realized at the interaction between a non-consumable welding tool that rotates on the contact surfaces of the workpieces. Friction Stir Spot Welding (FSSW) is an evolving technique that has received considerable attention from automotive industries to replace electric resistance spot welding, which shows poor weldability for advanced high-strength steels as well as aluminium alloys. Because of the interest shown by the industry towards this process, an attempt to optimize it is imperative. But the experiments are often time consuming and costly. To overcome these problems, numerical analysis has frequently been used in the last years. The purpose of this paper is to develop a three-dimensional fully coupled thermal-stress finite element (FE) model of FSSW process for thin aluminium alloy Al 6061-T6. Numerical simulation being helpful for better understanding and observation of the influence of input parameters on the resulting phenomena. It is described the algorithm and are presented the activities needed to be performed in order to develop a valid numerical model for FSSW. The validation of the numerical model being achieved by comparing the resulted temperatures from the numerical simulation with the experimentally determined temperatures for the same material

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