Tool Path Design in Friction Stir Spot Welding of AA6082-T6 Aluminum Alloys

2007 ◽  
pp. 767-774 ◽  
Author(s):  
G. Buffa ◽  
Livan Fratini ◽  
Mario Piacentini
Keyword(s):  
Aluminum Alloys ◽  
Spot Welding ◽  
Tool Path ◽  
Friction Stir Spot Welding ◽  
Friction Stir ◽  
Path Design

Tool Path Design in Friction Stir Spot Welding of AA6082-T6 Aluminum Alloys

2007 ◽  
Vol 344 ◽  
pp. 767-774 ◽  
Author(s):  
Gianluca Buffa ◽  
Livan Fratini ◽  
Mario Piacentini
Keyword(s):  
Spot Welding ◽  
Joint Strength ◽  
Tool Path ◽  
Friction Stir Spot Welding ◽  
Material Microstructure ◽  
Friction Stir ◽  
Path Design ◽  
Local Material ◽  
Initial Penetration ◽  
Process Mechanics

In the paper, a variation of the Friction Stir Spot Welding (FSSW) process has been considered. In particular, a particular tool path is given after the sinking phase nearby the initial penetration site. The process mechanics was highlighted and the joint strength was considered at the varying of the most relevant process parameters. Furthermore macro and micro analyses were developed in order to highlight the process mechanics and the local material microstructure evolution. The investigated technology appears a promising joining technique in order to develop effective spot joints.

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.

Refill friction stir spot welding of surface-treated aerospace aluminum alloys with faying-surface sealant

2019 ◽  
Vol 42 ◽  
pp. 113-120 ◽  
Author(s):  
Enkhsaikhan Boldsaikhan ◽  
Shintaro Fukada ◽  
Mitsuo Fujimoto ◽  
Kenichi Kamimuki ◽  
Hideki Okada
Keyword(s):  
Aluminum Alloys ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Friction Stir ◽  
Faying Surface ◽  
Surface Sealant

Towards Tool Path Numerical Simulation in Modified Friction Stir Spot Welding Processes

2009 ◽  
Vol 83-86 ◽  
pp. 1220-1227
Author(s):  
Gianluca Buffa ◽  
Livan Fratini
Keyword(s):  
Spot Welding ◽  
Tool Path ◽  
Base Material ◽  
Welding Process ◽  
Friction Stir Spot Welding ◽  
Lap Joints ◽  
Hollomon Parameter ◽  
Friction Stir ◽  
Strain And Strain Rate ◽  
Welding Processes

Spot welding can be considered a very common joining technique in automotive and transportation industries as it permits to obtain effective lap-joints with short process times and what is more it is easily developed through robots and automated systems. Recently the Friction Stir Spot Welding (FSSW) process has been proposed as a natural evolution of the already known Friction Stir Welding (FSW) process, allowing to obtain sound spot joints that do not suffer from the insurgence of typical welding defects due to the fusion of the base material. In the paper, a modified Friction Stir Spot Welding (FSSW) process, with a spiral circular movement given to the tool after the sinking stage, is proposed. A continuum based numerical model for Friction Stir Spot Welding process is developed, that is 2D Lagrangian implicit, coupled, rigid-viscoplastic. This model is used to investigate the distribution of the main field variables, namely temperature, strain and strain rate, as well as the Zener-Hollomon parameter which, in turn, strongly affects the Continuous Dynamic Recrystallization (CDRX) process that takes place in the weld nugget. Numerical and experimental results are presented showing the effects of the process parameters on the joint performances and the mechanical effectiveness of the modified process.

Numerical simulation of friction stir spot welding process for aluminum alloys

2010 ◽  
Vol 16 (2) ◽  
pp. 323-332 ◽  
Author(s):  
Dongun Kim ◽  
Harsha Badarinarayan ◽  
Ill Ryu ◽  
Ji Hoon Kim ◽  
Chongmin Kim ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloys ◽  
Spot Welding ◽  
Welding Process ◽  
Friction Stir Spot Welding ◽  
Friction Stir
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