Microstructure and Hardness Investigation of Different Welding Passes in Weld Zones

Friction Stir Welding (FSW) is a solid state process for joining aluminium and other metallic alloys where the metal is not melted during the welding process. It was invented to substitute conventional welding of aluminium alloy. This report will covers the theoretical background of friction stir welding, literature reviews on related research works, implemented methodology, results and discussions and lastly conclusion. The objective of this study is to analyze the microstructure of different welding passes in weld zones as well as the hardness of the weld zones.