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Characterization of the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

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Characterization of the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

Content Provider	Springer Nature Link
Author	Panda, Biranchi Garg, A. Jian, Zhang Heidarzadeh, Akbar Gao, Liang
Copyright Year	2016
Abstract	Friction stir welding (FSW) process has gained attention in recent years because of its advantages over the conventional fusion welding process. These advantages include the absence of heat formation in the affected zone and the absence of large distortion, porosity, oxidation, and cracking. Experimental investigations are necessary to understand the physical behavior that causes the high tensile strength of welded joints of different metals and alloys. Existing literature indicates that tensile properties exhibit strong dependence on the rotational speed, traverse speed, and axial force of the tool that was used. Therefore, this study introduces the experimental procedure for measuring tensile properties, namely, ultimate tensile strength (UTS) and tensile elongation of the welded AA 7020 Al alloy. Experimental findings suggest that a welded part with high UTS can be achieved at a lower heat input compared with the high heat input condition. A numerical approach based on genetic programming is employed to produce the functional relationships between tensile properties and the three inputs (rotational speed, traverse speed, and axial force) of the FSW process. The formulated models were validated based on the experimental data, using the statistical metrics. The effect of the three inputs on the tensile properties was investigated using 2D and 3D analyses. A high UTS was achieved, including a rotational speed of 1050 r/min and traverse speed of 95 mm/min. The results also indicate that 8 kN axial force should be set prior to the FSW process.
Starting Page	289
Ending Page	298
Page Count	10
File Format	PDF
ISSN	20950233
Journal	Frontiers of Mechanical Engineering
Volume Number	11
Issue Number	3
e-ISSN	20950241
Language	English
Publisher	Higher Education Press
Publisher Date	2016-06-20
Publisher Institution	Chinese Universities
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	tensile properties ultimate tensile strength tensile elongation friction stir welding tool rotational speed genetic programming welding speed Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering

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