Mechanical properties of friction stir welded carbon steel joints - friction stir welding with transformation
- Cui L. ,
- Fujii H. ,
- Tsuji N. ,
- et al
- Cui L. ,
- Fujii H. ,
- Tsuji N. ,
- Nakata K. and
- Nogi K.
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Description
Low temperature friction stir welding (FSW) was employed to join three types of carbon steels and the effects of carbon content, process conditions and phase transformations on the microstructure and mechanical properties of the welded joints were investigated. The grades tested were IF (0.002%C, 0.1%Mn), S12C (0.12%C, 0.29%Mn) and S35C (0.34%C, 0.21%Si, 0.69%Mn). A load-controlled machine was used to perform FSW experiments at different welding speeds (25-400 mm/min). Parent metal and weld zone microstructures were observed by optical microscopy and SEM, and ultimate tensile strength was determined from tensile tests. Issues discussed include the effects of process conditions and microstructure (ferrite-pearlite distribution and martensite formation) on joint strength.
6th International Symposium, 10-13 Oct 2006, Session 10A: FSW of Steels, Paper 01
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