Mechanical properties of graphite/aluminum metal matrix composite joints by friction stir spot welding

Development of in situ MMC joint using friction stir spot welding of Al6061-T6

“…Another possible reason for increase in tensile-shear strength with SiC particles is difference in thermal expansion coe cient of aluminium alloy and SiC particles. When FSSW joints cool down, strain elds formed around SiC particles, leading to formation of dislocations [27]. When FSSW weld subjected to tensile-shear loading, strain elds increase, which leads to piling up of dislocations and these piled up dislocations act as barrier on the way of crack propagation.…”

Ultrahigh-strength friction stir spot welds of aluminium alloy obtained by Fe3O4 nanoparticles

“…Fabrication of metal matrix composites (MMCs) by friction stir processing (FSP) has been well investigated during previous years. Recently, this concept has been considered for further improvement of the mechanical properties of the FSSW joints [8][9][10][11]. In this approach, reinforcing particles (RPs) are added to the weld zone for fabrication of the MMC structure.…”

“…The major advantage of this method is its capability to form MMCs in selective areas of the targeted material. Jeon et al [8] studied the FSSW of 5052-H32 and 1050-H14 aluminium sheets with the addition of graphite particles into the joint zone. They reported a significant improvement in the toughness and strength of the joints compared with the non-reinforced welds.…”

Preparation and Properties of Graphite/Antimony Composites Based on Coal Tar Pitch

“…Since carbon or graphite material is filled with a large number of microspores which decrease the mechanical strength and oxidation resistance of the material, impregnation and reinforcement methods are typically employed to fill pores. Many achievements have been made in impregnating porous carbon/graphite with nonmetals (such as resin) or metals (such as aluminum, copper, Babbitt metal and antimony) effectively compacting pores, improving material performance parameters such as oxidation resistance, strength and hardness, and enhancing applications in extreme operating conditions including high temperatures, heavy loads and high abrasion environments [2][3][4][5][6][7][8][9][10]. As an impregnating material, antimony is superior to others, and has become a recent focus in the field of impregnated carbon/graphite materials [1,[12][13].…”