CDRX modelling in friction stir welding of aluminium alloys

On the influence of tool path in friction stir spot welding of aluminum alloys

“…Finally the so-called nugget is found (A). The latter is a recrystallized area in which the original grain and subgrain boundaries appear to be replaced with fine, equiaxed recrystallized grains characterized by a nominal dimension of few m as described by Jata and Semiatin (2000), Su et al (2003) and Fratini and Buffa (2005). It should be observed that the peculiarities of the obtained microstructures strongly determine the joint effectiveness and its mechanical behavior.…”

Microstructural Effects of Zn/Mg Ratio and Post Heat Treatment on Tensile Properties of Friction Stirred Process (FSP) Al&ndash;<i>x</i>Zn&ndash;<i>y</i>Mg Alloys

“…According to plastic deformation degree and the heat-input in the stir zone, it can be distinguished stir zone (SZ), thermomechanically affected zone (TMAZ) and heat-affected zone (HAZ). 10) Tool rotation speed was 1670 rpm and the tool moving speed was fixed at 0.46 mm s ¹1 with 1.5°of tool angle. The downward push force was controlled at 30 MPa.…”

Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-T6 aluminum alloy

“…Indeed, for FSW under different values of ω (rpm) and ʋ (mm/min), the temperature and material flow patterns have been studied by numerous researchers. Fratini and Buffa 16 reported that with increasing ω (rpm) and decreasing ʋ (mm/min), the quality of the welding will be enhanced due to the increase in stirring effects. Furthermore, according to Arbegast and Hartley 17 , both the tool rotational speed (ω, rpm) and the welding speed (ʋ, mm/min) display a significant effect on the thermal input and mechanical properties.…”