Weldability Characteristics of Dissimilar Al/Cu Friction Stir Weld Joints

Furkan Sarsilmaz

doi:10.3139/120.110300

Artikel

Weldability Characteristics of Dissimilar Al/Cu Friction Stir Weld Joints

Furkan Sarsilmaz

Veröffentlicht/Copyright: 26. Mai 2013

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Aus der Zeitschrift Materials Testing Band 54 Heft 2

Abstract

In the present investigation, the AA1030 aluminium alloy and commercially pure copper plates were joined by friction stir welding. The effect of the processing parameters on the interface morphology, microstructure and strength of the joints was analyzed. The experimental results showed that some intermetallic compounds such as AlCu, Al₄Cu₉ and Al2Cu cause the weld to crack during the friction stir welding process on the centerline of the weld. Especially at lower traverse speeds such as 60, 90, and 125 mm/min, some tunnels and voids were detected in the Aluminium close to the Al/Cu interface. The maximum tensile strength of the samples was obtained at a traverse speed of 160 mm/min getting by without cavity defects in the weld. In addition, the fracture morphology revealed both partially brittle and cleavage-like fracture.

Kurzfassung

Für die in diesem Beitrag vorgestellte UNtersuchung wurden die Aluminium Legierung AA 1030 und kommerzielle reine Kupferplatten mittels Reibrührschweißen verbunden. Die Wirkung der Prozessparameter auf die Morphologie der Grenzfläche, die Mikrostruktur und die Festigkeit der Verbindung wurden analysiert. Die experimentellen Ergebnisse zeigen, dass einige intermetallische Verbindungen wie zum Beispiel AlCu, Al₄Cu₉ und Al₂Cu eine Rissbildung in der Schweißverbindungen entlang der Mittellinie verursachen. Insbesondere bei niedrigeren Vorschubgeschwindigkeiten wie zum Beispiel bei 60, 90 und 125 mm/min, wurden einige Tunnel und Poren im Aluminium nahe der Al/Cu-Grenzfläche entdeckt. Die höchste Festigkeit der Proben ergab sich für eine Vorschubgeschwindigkeit von 160 mm/min, ohne dass sich Volumendefekte in der Schweißverbin dung ausbildeten. Darüber hinaus wies die Bruchmorphologie beides auf, partiell spröde und Quasispaltbrüche.

Furkan Sarsilmaz received his B.S. degree at the Technical Education Faculty from Firat University, Turkey, in 2000. He then received his M.S. and Ph.D. degrees from the Department of Metallurgy in 2003 and 2008, respectively. Dr. Sarsilmaz is currently an Assistant Professor at the School of Technology Faculty at Cumhuriyet University in Sivas, Turkey. Dr. Sarsilmaz's research interests include solid state welding techniques and materials science

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Published Online: 2013-05-26

Published in Print: 2012-02-01

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https://doi.org/10.3139/120.110300