Achieving friction stir welded pure copper joints with nearly equal strength to the parent metal via additional rapid cooling

Enhanced mechanical properties of medium carbon steel casting via friction stir processing and subsequent annealing

“…In order to obtain a very low heat input and a rapid cooling rate, the steel plates were first fixed in water and additional rapid cooling with flowing water was used during the FSP process. Detailed parameters about the water cooling have been stated in the previous study [24]. In order to improve the ductility and the toughness, the FSP samples were annealed for 2 h at 500 and 600°C, respectively.…”

Microstructure and Mechanical Characterization of a Dissimilar Friction-Stir-Welded CuCrZr/CuNiCrSi Butt Joint

“…They found that defect-free joints were obtained at lower welding speeds and the maximum value of UTS of welded joints was 275 MPa. In order to improve the strength of copper joints, Xue et al [14] used flowing water as additional rapid cooling method to lower peak temperature during the process of FSW. The joints using this method kept the microstructure with a high dislocation density so that the UTS of joints could reach to 340 Mpa, which was nearly equal to the strength of base metal.…”

A comparative study of microstructure and mechanical properties between friction stir welded single and double phase brass alloys

“…The joint will be formed with local microstructural changes in metals due to the severe plastic deformation and frictional heat [2][3]. The merit of FSW on copper alloys has been evaluated by some workers [4][5][6][7][8][9][10][11][12][13][14]. For example, Galvao et al [4] showed that a scrolled tool resulted in finer grains, higher hardness and enhanced strength in the stir zone (SZ) of the joints.…”