Friction stir lap welding (FSLW) experiment has been conducted on 3mm thick AZ80 extruded sheet and 2.3mm thick AZ31B rolled sheet. The influence of the shape of the taper thread mixing head on microstructure has been discussed. Pores forming, hooked defects, interface migration, tissue distribution have been analyzed. The organization of both sides of nugget zone (NZ) is arranged diagonally ab...

Friction Stir Additive Manufacturing (FSAM) is a novel process with which large-scale aluminum structures can be produced from high-strength alloys such as the 7xxx series. Due to prevalence of these in airplanes and rockets, offers high application potential, for example fabricating stringers stiffeners. The building FSAM characterized by sequentially stacking friction stir lap welding (FSLW) ...

Friction Stir Welding (FSW) is a recently-developed technique where metals are joined together through mechanical stirring. FSW, often performed by robotic welders, is being used in an increasing number of industries such as aerospace, maritime and transportation. FSW has proven to be very effective and has replaced fusion welding and riveting in a number of manufacturing processes. In order to...

Friction stir lap welding (FSLW) between SPC270 steel sheet and A6061 aluminum alloy were investigated with the effect of tilt angle plunge depth tool. Tilt 3 degree improved material flow suppressed generation defect in weld. The weld strength increased tool achieved maximum value 212 MPa at 0.15 mm depth. From TEM observation, uniform reaction layer 450 nm was formed on interface. On interfac...

The joining of dissimilar hard metals such as high-strength steel and nickel-based alloy is required for shipbuilding offshore applications to enhance the strength, fracture toughness, corrosion resistance exposed parts. However, these alloys has remained a major challenge due limited solubility Fe Ni in each other, which commonly results formation brittle intermetallic compounds. We present he...

This study focused on the optimization of Al—Mg to CuZn34 friction stir lap welding (FSLW) process for optimal combination of rotational and traverse speeds in order to yield favorable fracture load using Grey relational analysis (GRA). First, the degree of freedom was calculated for the system. Then, the experiments based on the target values and number of considered levels, corresponding orth...

In order to achieve the goal of lightening braking system urban rail trains, SiCp/ZL101 and ZL101 plates were welded by friction stir lap welding (FSLW) prepare a new type brake disc material. The wear properties friction-stir-processed composite material studied at different temperatures (30 °C, 100 150 200 250 300 °C) provide theoretical basis for evaluation performance. experimental results ...