Analysis of tool wear and failure mechanism during friction stir welding of steel
- Weinberger T. ,
- Khosa S. ,
- Fuhrer B. ,
- et al
- Weinberger T. ,
- Khosa S. ,
- Fuhrer B. and
- Enzinger N.
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Description
Friction stir welding (FSW) experiments were undertaken on sheet specimens (thickness 4 mm) of AISI 304 stainless steel (17.5-19.5%Cr, 8-10.5%Ni) using different uncoated and coated tungsten and WC-based tools, and tool wear and failure mechanisms were investigated. Welding was performed at traverse speeds of 55-155 mm/min, rotational speeds of 400-750 rpm and tilt angles of 1-3 degrees. Forces and spindle torque were measured by high accuracy pressure cells. Temperature distribution was measured by thermocouples and simulated by finite element modelling. Weld microstructure was observed by optical microscopy and SEM and tool remnants in the nugget were analysed by energy dispersive x-ray spectroscopy. Abrasive wear, deformation and brittle fracture issues for FSW tools are discussed.
7th International Symposium, 20-22 May 2008, 9B: Steel 3, Paper 03
Subjects
- Ferrous
- Material
- Stainless steels
- Austenitic stainless steels
- Failure
- Friction welding
- Welding
- Process
- Friction stir welding
- Tribological properties
- Properties
- Wear
- Process equipment
- Friction stir welding tools
- Process conditions
- Microstructure
- Weld zone
- Weld
- Dynamically recrystallised zone
- Fracture
- Defects
- Deformation
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