RECENT ADVANCEMENT IN COOLING ASSISTED (UNDER-WATER) FRICTION STIR WELDING

Abstract

“Friction Stir Welding (FSW)” underscores its potential in achieving superior mechanical properties and corrosion resistance across various alloys. Notably, underwater FSW demonstrated a remarkable “tensile strength of 152.3 MPa, representing 63.5% of the strength of AZ31 Mg alloy”. Studies on tool design and cooling conditions revealed a “joint efficiency of 76% and a tensile strength of 345 Mpa” using a taper threaded pin tool with underwater cooling. Additionally, investigations into the tensile properties of AA2219 aluminum alloy highlighted the mitigating effect of underwater cooling on potential yield strength decreases. The impact of “rotational speed on tensile properties in 2519-T87 aluminum alloy” emphasized the importance of parameter optimization. Corrosion resistance studies further showcased the effectiveness of underwater FSW in enhancing joint durability. These collective findings contribute to advancing underwater FSW technology, offering promising applications in industries requiring robust material joints with superior mechanical and corrosion-resistant properties.