Effect of Friction Stir Processing on AZ91 Mg-alloy: A Review

Generally properties of as-cast AZ91 soft Mg-alloy can be improved by conventional artificial aging. Conventional methods are time consuming and expensive process. Friction stir processing (FSP) based on working principle welding replace the processes at some extent. FSP generates enough heat in process to decrease grain size coarse grains significantly accordingly alter properties. extensive used for modification morphology, refinement etc. especially as cast alloys. By performing successfully alloy many changed varying friction parameters. The resultant processed alloys credited plastic deformation sheet rotating non-consumable tool. Due number dislocation increase it may pile up, a result movement dislocations restricted required more stress deform, thus strengthen alloy. Tool plays crucial role, tool shoulder pin generate frictional heat, also improve material flow characteristics. reduced enhanced various This paper mainly reviews effect terms enhancement.