FRICTION STIR SPOT WELDING OF DISSIMILAR JOINT OF AA7075 AL AND AZ31 MG ALLOYS /
Taiwo Elias OLAIYA; Supervisor: Asst. Prof. Dr. Vahid Khojastehnezhad
- 82 sheets; 31 cm. Includes CD
Thesis (MSc) - Cyprus International University. Institute of Graduate Studies and Research Mechanical Engineering Department
Includes bibliography (sheets 79-82)
ABSTRACT Due to their beneficial characteristics, which include a high power-to-weight ratio, low density, high heat conductivity, and corrosion resistance, aluminum and its alloys have been effectively used in the aircraft and car industries. However, there are several limitations for application in such sectors due to low outer element homes, which include hardness and wear resistance. Due to the increasing need for them in industries like automotive, aerospace, deep-ocean, nuclear energy production, structural applications, etc., lightweight and high-performance materials are becoming more and more essential. This has led to the development of friction stir spot welding (FSSW). As a result of the development of friction stir welding as a novel method for fusing aluminum alloys, friction stir spot welding (FSSW), a solid-state welding procedure, was created (FSW). The surrounding material is softened during FSSW by frictional heat created at the tool-workpiece contact, and material slide is brought on by the spinning and transferring pin. The combining of the plasticized fabric and the forging strain create a solid link. In this work, three main method components-rotating speed, feed rate, and dwell time-are regarded as crucial aspects in determining the toughness of welded joints made of the 7075 aluminum alloy and the AZ31 magnesium alloy. The completion of 72 weld schedules and the acquisition of experimental tensile parameters. Keywords: Aluminium Alloys; Friction Stir Spot Welding (FSSW). Tensile Strength, Hardness, Feed Rate, Rotational Speed, Plunging, Stirring, Retracting.