Analysis and Comparison between Different Joining Technology of Aircraft Structures including Innovative FSW and RFSSW Processes

One of the alternative method for welding method is a friction stir welding (FSW), which was developed in 1991 at TWI Ltd. (The Welding Institute) in the United Kingdom, initially especially for joining aluminum and its alloys [1]. This process consists in joining of materials in solid state, which eliminates the problems resulting from melting the material and its re-solidifying, such as, hot cracking, residual stresses and distortion created during conventional welding.