Friction Stir Welding

Close-up view of a friction stir weld tack tool
Close-up view of a Friction stir Weld tack tool

Introduction

Friction Stir Welding (FSW) is a solid-state welding process that was invented by The Welding Institute (TWI) in 1991. It is commonly used in the aerospace, automotive, and shipbuilding industries to join aluminum and other high-strength materials. FSW is a relatively new welding process that offers many advantages over traditional welding methods, including low distortion, minimal porosity, and high weld strength.

How it works

FSW uses a rotating tool that is inserted into two workpieces that are clamped together. The tool is then moved along the joint, creating friction and heat. The heat generated by the friction causes the material to soften and become plastic. The rotating tool then stirs the softened material together, creating a solid-state bond between the two workpieces. The tool is then removed, leaving a clean and strong joint.

Advantages

Disadvantages

Applications

FSW is commonly used in the following industries:

The process is used to join a wide range of materials, including aluminum, magnesium, copper, and titanium.

Conclusion

Friction Stir Welding is a solid-state welding process that offers many advantages over traditional welding methods. It is commonly used in the aerospace, automotive, and shipbuilding industries to join high-strength materials. While it may have a higher initial cost compared to traditional welding methods, the long-term benefits make it a valuable investment for many industries.

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