6005A-T6铝合金搅拌摩擦焊缝的自然时效效应

doi:10.12052/gdutxb.150144

Abstract

Abstract:

The 6005-T6 aluminum alloy extrusion profiles were obtained by friction stir welding. With the help of mechanical tensile test machine, Vickers hardness tester, optical microscope (OM), energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM), the effect of natural aging on the mechanical properties of the welding joints is proven. The results shows that the 6005-T6 aluminum alloy with the extension of the natural aging time after welding, its tensile strength and the nugget zone (NZ) hardness increasing firstly and tending to be stable while the hardness of the weld heat affected zone (HAZ) remains unchanged and elongation changes a little. The FSW joints achieves the stable natural aging condition after natural aging 720 h. Natural aging improves the tensile strength and the hardness of welding joints mainly because the nugget zone precipitates more small and dispersed Mg₂Si phases in the process of natural aging.

Key words: 6005A-T6 aluminum alloy, friction stir welding, natural aging, mechanical properties

CLC Number:

TG146.2

He Li-qian, Yuan Ge-cheng, Luo Zhi-jie, Guo Hai-bin. Natural Aging Effect in Friction Stir Welding of 6005A-T6 Aluminum Alloy[J].Journal of Guangdong University of Technology, 2017, 34(02): 54-57.

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Natural Aging Effect in Friction Stir Welding of 6005A-T6 Aluminum Alloy

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