Transactions of Nanjing University of Aeronautics & Astronautics
Achieving High-Quality Aluminium Alloy Welded Joint with Fine Grains Using Submerged Friction Stir Welding
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Abstract:
The purpose of this study is to reveal the microstructure and mechanical properties of friction stir welding （FSW） joints prepared in water/air. For comparable analysis， the submerged FSW （SFSW） and conventional FSW are both conducted on 6061-T6 aluminum alloy plates at the combination rotation speed of 800 r/min and the traverse rate of 50 mm/min. The results show that a greatest grain refinement is achieved by SFSW， which is remarkably smaller than that of the base material （BM） and air FSW （AFSW） samples， leading to a significant improvement of tensile strength from 202.5 MPa in the AFSW sample to 232 MPa in the SFSW sample.
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TG4
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