Abstract
Previous research suggested that fabricating composite material in welded area during FSSW(Friction Stir Spot Welding) can improve the joining strength of FSSWed PVC joint. In this study, effects of guide hole diameter and particle size of SiC particle on joining strength of FSSWed PVC joint compounded SiC particle in welded area were investigated. Lager guide hole diameter resulted in increasing width of welded area because of higher heat input during the process. According to result of tensile shear test, joining strength increased with increasing guide hole diameter. In other words, it is considered that joining strength is affected by width of welded area. Larger particle size led to increasing heat input during the process and resulted in increase in width of welded area. However, excessive heat input induced degradation of mechanical property in welded area. In case of the specimen compounded SiC particle with size of 14.6μm, the joining strength was the similar as the specimen compounded SiC particle with size of 6.5μm, nevertheless, the largest width of welded area was observed. These results suggested that joining strength of FSSWed PVC joint fabricated material composite in welded area was affected by not only width of welded area, but also mechanical property of welded area.
