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Article

Influence of Alloys Position, Rolling and Welding Directions on Properties of AA2024/AA7050 Dissimilar Butt Weld Obtained by Friction Stir Welding

Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Materials Mechanics, Solid-State Joining Processes (WMP), 21502 Geesthacht, Germany
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Metals 2018, 8(4), 202; https://doi.org/10.3390/met8040202
Received: 26 February 2018 / Revised: 14 March 2018 / Accepted: 19 March 2018 / Published: 22 March 2018
(This article belongs to the Special Issue Friction Stir Welding and Processing in Alloy Manufacturing)
Friction stir welding (FSW) was carried out for the butt joining of dissimilar AA2024-T3 and AA7050-T7651 aluminium alloys with 2-mm thicknesses. A comparison between the position and orientation of different materials was performed by varying the welding speed while keeping the rotational speed constant. Through an analysis of the force and torque produced during welding and a simple analytical model, the results indicate that the heat input was reduced when the AA7050 alloy was located in the advancing side (AS) of the joint. The different material positions influenced the material transportation and the interface in the centre of the stir zone (SZ). The microhardness of both materials was lower when they were in the AS of the joint. The differences in the hardness values were reduced at higher welding speeds when the heat input was decreased. The mechanical performance increased when the lower strength alloy was located in the AS. The material orientation exhibited a small influence when the AA7050 alloy was in the AS and in general on the resulting microhardness for all the cases analysed. The tensile strength values were very similar for both orientations, but an increase in the yield strength could be measured when the materials were oriented in the transverse direction. View Full-Text
Keywords: friction stir welding; dissimilar welded joints; materials position; material orientation; process analysis; microstructure analysis; mechanical behaviour friction stir welding; dissimilar welded joints; materials position; material orientation; process analysis; microstructure analysis; mechanical behaviour
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MDPI and ACS Style

Barbini, A.; Carstensen, J.; Dos Santos, J.F. Influence of Alloys Position, Rolling and Welding Directions on Properties of AA2024/AA7050 Dissimilar Butt Weld Obtained by Friction Stir Welding. Metals 2018, 8, 202. https://doi.org/10.3390/met8040202

AMA Style

Barbini A, Carstensen J, Dos Santos JF. Influence of Alloys Position, Rolling and Welding Directions on Properties of AA2024/AA7050 Dissimilar Butt Weld Obtained by Friction Stir Welding. Metals. 2018; 8(4):202. https://doi.org/10.3390/met8040202

Chicago/Turabian Style

Barbini, Alessandro, Jan Carstensen, and Jorge F. Dos Santos. 2018. "Influence of Alloys Position, Rolling and Welding Directions on Properties of AA2024/AA7050 Dissimilar Butt Weld Obtained by Friction Stir Welding" Metals 8, no. 4: 202. https://doi.org/10.3390/met8040202

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