Microstructure evolution of the Invar 36 alloy FSW joint
- Zhao Y. ,
- Wu A.P. ,
- Zou G.S. ,
- et al
- Zhao Y. ,
- Wu A.P. ,
- Zou G.S. ,
- Sato Y.S. and
- Kokawa H.
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Description
Friction stir welding (FSW) experiments were undertaken on Invar 36 alloy (Fe,36%Ni) sheet specimens (thickness 3 mm) and the microstructure evolution and recrystallisation mechanism were investigated. Bead-on-plate FSW was performed using a polycrystalline boron nitride tool and stainless steel backing plate at a travel speed of 1 mm/s, rotational speed of 100 rpm and plunge depth of 0.45 mm. Microstructure, grain size and orientation characteristics were examined by optical microscopy, SEM and electron backscatter diffraction. Grain boundary maps, incorporating low angle boundaries, high angle boundaries and twin boundaries, were obtained for different weld zones. The roles of discontinuous and continuous recrystallisation mechanisms in microstructure development are discussed.
10th International Symposium, 20-22 May 2014, Session 10B: High Temperature, Paper 02
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