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http://dx.doi.org/10.5762/KAIS.2017.18.11.124

Evaluation of the Effect of Rotating Tool for Friction Stir Welding Al6005-T6  

Choi, Dooho (Division of Advanced Materials Engineering, Dong-Eui University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.11, 2017 , pp. 124-129 More about this Journal
Abstract
In this study, we report characteristics of friction stir welding (FSW) technique applied to Al-6005-T6 extruded sheets, which is a common material for railway car bodies. With the welding speed fixed at 300 mm/min, the revolution per minute (RPM) of the rotating tool was varied from 600 to 1800 RPM, with the aim at evaluating the resultant microstructure and mechanical behaviors. Comparison is also made with the conventional Metal Inert Gas (MIG) welding technique. Unlike MIG, no micro-voids were observed for FSW specimens. Hardness measurement revealed that the increased heat input by increasing RPM results in widened heat affected zone (HAZ) and decreased hardness for HAZ due to grain coarsening. Hardness results for the nugget do no show difference. During tensile tests, specimens fractured at HAZ, and increasing rpm led to decrease of the yield stress and tensile stress for the selected RPM range, which is considered to be due to the grain coarsening for HAZ.
Keywords
Friction stir welding; Mechanical properties; Microstructure; Rollingstock; Tension test;
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Times Cited By KSCI : 1  (Citation Analysis)
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