Published Paper Details:

Friction stir welding (FSW) is a solid (not molten metal) joining technique in situations where the properties of the original metal must be preserved as much as possible. It involves mechanically mixing two metals together, softening them, and then forcing them together, like clay, mass, and grinding. In most cases, large parts that cannot be easily heated are joined afterwards to maintain the controlled properties of aluminum during this process. Light metal alloys such as aluminium, magnesium and their compounds can now be joined by friction, which significantly stimulates welding. In this work, different aluminum alloy sheets AA2024 - AA7075 and AA6063-AA6069 were used for square tools. The tool parameters considered are 1600 rpm, 120 mm/min stroke and four offset values of 0 mm, 0.5 mm, 1 mm and 1.5 mm. Mechanical properties such as tensile strength, hardness and flexural strength were examined using standard testing procedures. It can be clearly seen the increase in the offset value due to the increase in tensile strength in the case of AA202-AA7075, but slight declines were observed in AA6063-AA6069. A higher hardness is observed in the compact and relatively economical HAZ, the smallest value in the base metal. The bending strength of the metal is lower, but between the 1.5mm thickness of the tape it provides better bending strength.