Tool material effect on the friction stir butt welding of AA2124-T4 Alloy Matrix MMC

Abstract

The purpose of the present work is to study on the effect of material properties tool on friction stir butt welding of AA2124-T4 alloy matrix MMC. Uncoated tool, coated tool with a CrN, and coated tool with AlTiN were used to weld aluminum MMC plates. Macrostructure and microstructure observations, ultimate tensile strength, wear resistance, and chemical analysis were carried out to determine the appropriate tool for joining these composite plates. Results showed that the good welded joints could be obtained when a tool is coated with AlTiN. Keywords: Friction stir welding, AA2124-T4 alloy matrix MMC, Tool wear, Tensile test