EXPERIMENTAL EVALUATION OF BUTT WELDED SPECIMENS OF AA2024-T3 ALLOY WELDED BY FRICTION STIR WELDING WITH TWO CONSEQUENT PASSES | ||
| AL-TAQANI | ||
| Article 1, Volume 25, Issue 1, March 2012, Pages 0-0 | ||
| Author | ||
| Hatim Mohammed . Mahmood | ||
| Abstract | ||
| The aim of the present work is to investigate the mechanical properties and macrostructure of butt joints friction stir welded (FSW) specimens welded with two subsequent passes (one from each side).The material used is AA2024-T3 aluminum alloy 5 mm thick .Pin rotational speed of 900 rpm and 25 mm/min feed is used in this work . The two passes either interferes each other by 0.5 mm or a gap of 0.5 mm between them is existed. The welded specimens have been tensile tested at room temperature in order to analyze the mechanical properties with respect to the parent metal. The macrostructure of the welded specimens has been studied by employing optical microscopy. Micro-hardness examination is also performed on the welded specimens. The two passes FSW specimens with 0.5 mm clearance showed higher yield stress and less percentage elongation than the others ,while specimens with 0.5 mm interference showed higher ultimate tensile stress and higher percentage elongation. | ||
| Keywords | ||
| Friction stir welding; subsequent passes; mechanical properties | ||
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