Microstructure and heat treatment behavior of friction stir welded titanium plate
- Kawamoto T. ,
- Ueda M. and
- Ikeda M.
- Kawamoto T. ,
- Ueda M. and
- Ikeda M.
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Description
Friction stir welding (FSW) experiments were conducted on commercially pure titanium sheet (thickness 3 mm) to identify the optimum tool material and process conditions; the microstructure and mechanical properties of the welded joints were determined, and the effect of PWHT was investigated. The pin material chosen was a heat-resistant Ni-Cr alloy implanted with fluorine. FSW parameters were rotational speed of 600 rpm, welding speed of 1.67 mm/s and load of 19.9 kN. Microstructure was observed by optical microscopy and SEM. Mechanical properties were characterised by Vickers hardness measurements and tensile tests. PWHT was performed at a temperature of 900 deg.C for 3600 s followed by quenching in ice water. Factors affecting the hardness distribution and the occurrence of voids are discussed.
7th International Symposium, 20-22 May 2008, Poster Session, Paper 11
Subjects
- Friction welding
- Welding
- Process
- Friction stir welding
- Process equipment
- Friction stir welding tools
- Microstructure
- Nonferrous
- Material
- Titanium and Ti alloys
- Heat treatment
- PWHT
- Process conditions
- Mechanical properties
- Properties
- Hardness
- Strength
- Ultimate tensile strength
- Weld zone
- Weld
- Dynamically recrystallised zone
- Defects
- Cavities
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