Friction Stir Welding of the AlSi10Mg Aluminum Alloy Produced by Selective Laser Melting

The technological features of friction stir welding of the butt joints of AlSi10Mg alloy powder plates produced by selective laser melting are investigated. The AlSi10Mg alloy plates are grown by selective laser melting at an angle of 90 degrees to a build platform. The ultimate tensile strength of the welded joints of the plates grown by selective laser melting is 274-306 MPa, and the bending angle of the plates is 69 degrees-85 degrees. The fracture of the welded joints occurs along the mixing zone metal. The following two types of porosity are found in the microstructure of the base metal: flattened pores along the boundary of visible melt baths and spherical pores. No porosity is found in the mixing zone metal.