Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 486, Issue 1-2, Pages 85-95Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2007.08.041
Keywords
friction stir welding; tensile test; differential scanning calorimetry (DSC); transmission electron microscopy (TEM); aluminium alloys; precipitation
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The effect of the welding speed on the microstructure, local and overall mechanical properties of friction stir welded joints has been investigated in the aluminium alloy 6005A-T6. The fine hardening precipitation within the heat-affected zone has been characterized by differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). Post-welding heat treatments have been applied to obtain indications on the level of solid solution supersaturation in the as welded state. The local mechanical behaviour was determined using thin specimens extracted from various regions of the weld. The overall properties were measured on samples cut perpendicular to the weld. Specific attention was devoted to the relationship between the local microstructure and local hardening properties in the weakest region, which govern the overall strength and ductility of the welds. (C) 2007 Elsevier B.V. All rights reserved.
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