Abstract
Mg-Al-Sn alloys are being developed as a new series of magnesium alloys due to good properties without any rare earth components. In order to investigate the effects of friction stir welding (FSW) on microstructures and mechanical properties of Mg-5Al-3Sn magnesium alloy, the hot-extruded alloy plates were butt welded by FSW at various welding speeds. The results showed that the alloy was jointed without defects. After FSW, β-Mg17Al12 phase was dissolved into α-Mg matrix while Mg2Sn phase with high dissolution point and good thermal stability remained in the nugget zone (NZ). With increasing welding speed, the maximum (0002) pole intensity in the NZ first decreased and then increased, and grain size of α-Mg matrix decreased arising from lower heat input while some intermetallic particles coarsened at higher welding speed due to solid state diffusion and less applied stress. In all cases the tensile properties of the alloy after FSW decreased due to the softened region at the heat-affected zone (HAZ), the dissolution of β-Mg17Al12 phase, the residual stress and dislocation content in the TMAZ, the textural variation and the secondary phase changes. The elastic behavior of weld joints was different from the BM due to the dissolution of β-Mg17Al12 particles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
