Microstructure and Mechanical Properties of Friction Stir Welded AA6060-T6 Tubes

Gianluca D'Urso; Michela Longo; Claudio Giardini

doi:10.4028/www.scientific.net/KEM.554-557.977

Paper Titles

On the Development and Computational Implementation of Complex Constitutive Models and Parameters’ Identification Procedures
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Development of an Inverse Routine to Predict Residual Stresses in the Material Based on a Bending Test
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A Two-Pronged Approach for the Assessment of Springback Variability for Sheet Metal Forming Applications
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Application of Tube Hydroforming in Square Cross-Section Die for Inverse Identification Method Validation
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Microstructure and Mechanical Properties of Friction Stir Welded AA6060-T6 Tubes
p.977

Effect of Welding Parameters on AA8090 Al-Li Alloy FSW T-Joints
p.985

Effect of Surface Pretreatment on the Performance of Adhesive-Bonded Joints
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Study of the Forces Generated during Nonlinear Friction Stir Welding: Circular Trajectory
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Cladding of Advanced Al Alloys Employing Friction Stir Welding
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 554-557Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of Friction Stir Welded AA6060-T6 Tubes

Abstract:

Friction stir welding (FSW) has received increasing attention in recent years thanks to its advantages over traditional welding processes, reducing distortion and eliminating solidification defects. Since melting does not take place and joining occurs below the melting temperature of the material, this welding process allows to obtain a weld characterized by very high quality with low heat input, minimal distortion, no filler material, and no fumes. FSW is also highly efficient and it is characterized by improved environmental performance if compared to traditional welding methods. For instance, FSW is particularly advantageous in the pipeline industry because this innovative welding process usually entails reduction in energy usage of up to 80% if compared to conventional fusion welding processes. Moreover, also alloys normally difficult to be welded can be considered with this technique. The objective of the present study is to establish and to study the weldability of aluminum tubes by means of FSW process. The study shows preliminary results on circumferential FSW of AA6060-T6 aluminum tubes and the influence of the welding process on weld quality. The experimental campaign was performed on tubes having a thickness equal to 5 mm and an external diameter equal to 80 mm. Tubes were welded by means of a four axes CNC machine tool. Particular care was paid to the fabrication of the inner support for the tube. The mandrel was designed in order to guarantee limited bending during the welding process. Some preliminary tests were carried out by varying the welding parameters, namely feed rate (f) and rotational speed (S). A tool having conical shoulder and cylindrical pin was used. The weld quality investigation was based on tensile tests, microhardness and macrostructure analysis of the joints.

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Periodical:

Key Engineering Materials (Volumes 554-557)

Pages:

977-984

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.554-557.977

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Online since:

June 2013

Authors:

Gianluca D'Urso, Michela Longo, Claudio Giardini

Keywords:

Circumferential Welding Strength, Microhardness, Microstructure, Tube FSW

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