Influence of tool geometry and processing parameters on welding defects and mechanical properties for friction stir welding of 6061 Aluminium alloy

FSW has become the most effective technology in solving problems that have reached the profiled sheets with the continuation of material, particularly in the aerospace industry, with the use of different joining techniques that require high ductility and tensile strength. Current study, FS weldments AA6061-T6 were successfully obtained with varying processing parameters and were mechanically and metallurgically characterized. This paper illustrates macrostructure analysis, influence of tool geometry and process parameters, Fractography analysis microstructure analysis, microhardness of aluminium alloy AA6061-T6.

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Mechanical Properties of ADC12-6061 Aluminium Alloy Joints Produced by Friction Stir Welding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.822 ◽

2011 ◽

Vol 418-420 ◽

pp. 822-826

Author(s):

Jia Feng Li ◽

Xiao Gang Chen ◽

Yong Gang Xu

Keyword(s):

Mechanical Properties ◽

Friction Stir Welding ◽

Aluminium Alloy ◽

Room Temperature ◽

Fracture Morphology ◽

Optical Microscope ◽

Microstructural Properties ◽

Friction Stir ◽

Mechanical And Microstructural Properties ◽

6061 Aluminium Alloy

The aim of present work is to investigate the mechanical and microstructural properties of dissimilar ADC12 and 6061 aluminium alloy joints produced by friction stir welding (FSW). The microstructure of joints has been observed by employing optical microscope. Furthermore, the welded joints have been tested under tension at room temperature in order to analyse their mechanical properties. At last, the scanning electron microscope (SEM) was employed to observe the specimens’ fracture morphology.

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The Use of Bobbin Tools for Friction Stir Welding of Aluminium Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.638-642.1179 ◽

2010 ◽

Vol 638-642 ◽

pp. 1179-1184 ◽

Cited By ~ 31

Author(s):

Philip L. Threadgill ◽

M.M.Z. Ahmed ◽

Jonathan P. Martin ◽

Jonathan G. Perrett ◽

Bradley P. Wynne

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Friction Stir Welding ◽

Cross Section ◽

Axial Force ◽

Aluminium Alloys ◽

Processing Parameters ◽

Machine Design ◽

Friction Stir ◽

Triangular Zone

The use of a double sided friction stir welding tool (known as a bobbin tool) has the advantage of giving a processed zone in the workpiece which is more or less rectangular in cross section, as opposed the triangular zone which is more typically found when conventional friction stir welding tool designs are used. In addition, the net axial force on the workpiece is almost zero, which has significant beneficial implications in machine design and cost. However, the response of these tools in generating fine microstructures in the nugget area has not been established. The paper presents detailed metallographic analyses of microstructures produced in 25mm AA6082-T6 aluminium wrought alloy, and examines grain size, texture and mechanical properties as a function of processing parameters and tool design, and offers comparison with data from welds made with conventional tools.

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