Abstract
Abstract. Friction stir welding (FSW) is an important joining process wherein two dissimilar metals and alloys are welded together using frictional heat produced in a revolving tool and workpiece. FSW is playing an important role in dissimilar material joining of Magnesium (Mg) and Aluminum (Al) materials due to the increasing demand for their industrial applications. In this review article, the research background of FSW processes, and influences of joining factors on tensile strength, micro-hardness, and microstructures of FSW of Al-Mg alloy materials have been studied. The effects of joining factors for example axial force, tool revolving speed, tool incline, speed, and offset on welding characterizes have been enlightened to make defect-free FSW of aluminum and magnesium alloys. The microstructural behaviors of intermetallic formation and material drift in FSW zones of Al-Mg were also studied to find the scope to improve the welding quality.
Highlights
Introduction and backgroundFriction stir welding (FSW) is an essential metal welding technique that was invented in 1991 by The Welding Institute (TWI)
Banglong Fu et al stated that the toughnessof welded joints was increased while locating Mg on the leading edge and offsetting tool of dissimilar metals (AA6061 and AZ31B) and it was reduced while placing Al on the leadingside and tool offsetting due to reducing heat absorption[11]
It was concluded that the quality welding was obtained from processes of advancing side and tool pin offset towards magnesium side; the hardness and tensile strength were improved by the process in Al side [3]
Summary
It was concluded that the quality welding was obtained from processes of advancing side and tool pin offset towards magnesium side; the hardness and tensile strength were improved by the process in Al side [3]. Dharmalingam et al testified from FSW experiments of Al-Mg that the maximum tool revolving speed and minimum tool feed rate were applied to improve the micro-grain structure and tensile strength while welding AA8011 and AZ31 Alloys [10].
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