The Role of Vertical Tool Load on the Joint Properties of Friction Stir Spot Welded Brass Alloy

This study consisted of the effects of vertical tool load on failure value in FSSW of CuZn30. Tensile-shear test, microstructural examination, microhardness, vertical tool load, and temperature measurements were utilized to reveal the influence of FSSW process. According to the results, the tool load plays a key role on the features of joint. Not only low tool load, but also excessive load used leads to drop in the tensile-shear values. The spot weld region was characterized by stir and heat-affected zones and these have various microhardness values ranging from 108.2 HV to 150.2 HV. The temperature measurements show that the peak temperature increased with increasing tool load value..