Friction Stir Welding

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

• Minimal distortion
• High weld strength
• No filler material required
• Low porosity
• Good fatigue properties

Disadvantages

• Requires specialized equipment
• Not suitable for all materials
• Higher initial cost compared to traditional welding methods

Applications

FSW is commonly used in the following industries:

• Aerospace
• Automotive
• Shipbuilding
• Manufacturing
• Construction
• Defense

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.

Related Posts:

• Health Protection, Safety and Welding Ventilation
• Rotary Friction Welding
• Inertia Friction Welding
• Linear Friction Welding
• https://en.wikipedia.org/wiki/Friction_stir_welding
• Orbital Friction Welding