Texture Development in Aluminum Friction Stir Welds

Microstructural Variation and Tensile Properties of a Cast 5083 Aluminum Plate via Friction Stir Processing

“…Considering the friction stir welding (FSW) [4][5][6][7][8][9][10][11] have emerged as a promising solid-state joining process. Particularly, when FSW utilized in tailor weld blanks, a post-weld deformation such as pressing and bending works is inevitable.…”

“…As it has been developed based on basic concept of FSW, this process is often utilized to refine the grain size or to homogenize the heterogeneous intermetallic solidification precipitates. Many previous reports 5,6,14) characterizing the microstructural feature pertaining to dynamic recrystallization have been completed. These studies might lead to a better understanding of friction stir processed alloy 5083, however, FSP and FSW have not been examined on material with such coarse equaxed casting microstructure, and might possess different tensile deformation behavior from other friction stir processed wrought alloys.…”

Texture Development and Material Flow Behavior During Refill Friction Stir Spot Welding of AlMgSc

“…For instance, material flow during FSW is driven by simple shear resulting from both the tool shoulder and the pin. [15,16] However, the coexistence of shoulder-induced and pin-induced textures may decrease the integrity of the weld in subsequent performance. [17][18][19] Therefore, understanding the material flow behavior is of practical importance for optimizing tool design and obtaining welds with high structural efficiencies.…”

Development of nanocrystalline structure in Cu during friction stir processing (FSP)

“…In this study, the formation of sub-micron and nano-scale crystalline structures reflects a direct transformation by coarsening of the highly refined microband structures formed around the tool pin. It should be noted that several recrystallization theories including continuous dynamic recrystallization, discontinuous dynamic recrystallization, geometric dynamic recrystallization and recrystallization via particle stimulated nucleation, which were developed to account for grain size control during conventional thermo-mechanical processing, have also been used to explain the formation of fine grain structures (usually 1-10 m) during FSW/FSP [5,[41][42][43][44][45][46][47][48]. Common FSW and FSP technologies inherently involve severe plastic deformation (SPD) as well as transients and gradients in strain, strain rate and temperature.…”