Microstructure and Mechanical Properties of AA 5083 and AA 6061 Welds Joined with AlSi5 and AlSi12 Wires*

Hakan Cetinel; Mehmet Ayvaz

doi:10.3139/120.110647

Article

Microstructure and Mechanical Properties of AA 5083 and AA 6061 Welds Joined with AlSi5 and AlSi12 Wires*

Hakan Cetinel and Mehmet Ayvaz

Published/Copyright: October 11, 2014

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From the journal Materials Testing Volume 56 Issue 10

Abstract

Aluminum alloys are used in various industries including marine, defense, automotive, transportation and aerospace. Common to all of these industries is the need to join aluminum parts using fusion based welding processes. However, there are some difficulties in welding aluminum alloys, such as, for instance, hot cracking. In this study, the aluminum alloys 5083 and 6061 were welded using the TIG process and two filler wires (AlSi12 and AlSi5). Six different alloy combinations were investigated, i. e., 5083-AlSi5-5083, 5083-AlSi12-5083, 6061-AlSi5-6061, 6061-AlSi12-6061, 5083-AlSi5-6061 and 5083-AlSi12-6061. The mechanical properties of the samples were evaluated by microhardness scans, tensile tests as well as Charpy and three point bend tests. In addition, microstructural investigations were performed by optical microscopy.

Kurzfassung

Aluminiumlegierungen werden in verschiedenen Industriebranchen eingesetzt, beispielsweise in der Marinetechnik, sowie in der Verteidigungs-, Automobil-, Transport- und Luftfahrtindustrie. Gemeinsam ist all diesen Zweigen, dass Aluminiumteile mit Schmelzschweißprozessen miteinander verbunden werden müssen. Jedoch bestehen einige Schwierigkeiten beim Aluminiumschweißen, wie zum Beispiel die Heißrissbildung. In der diesem Beitrag zugrunde liegenden Studie wurden die Aluminiumlegierungen 5083 und 6061 mit dem WIG-Verfahren unter Verwendung von zwei verschiedenen Zusatzdrähten (AlSi5 und ALSi12) geschweißt. Es wurden sechs verschiedene Legierungskombinationen untersucht, und zwar 5083-AlSi5-5083, 5083-AlSi12-5083, 6061-AlSi5-6061, 6061-AlSi12-6061, 5083-AlSi5-6061 und 5083-AlSi12-6061. Die mechanischen Eigenschaften der Proben wurden mittels Härtescans, Zugversuchen sowie Charpy- und Dreipunktbiegeversuchen bestimmt. Zusätzlich wurden mikrostrukturelle Untersuchungen mittels Lichtmikroskopie durchgeführt.

**Correspondence Address Res. Asst. Mehmet Ayvaz, Faculty of Engineering, Department of Mechanical Engineering, Muradiye Kampusu 45140 Manisa, Turkey

Assoc. Prof. Dr. Hakan Cetinel, born 1969, achieved his BSc in Metallurgical and Materials Engineering in 1993, his MSc in Mechanical Engineering in 1997 and his PhD in Mechanical Engineering in 2004. Since 2009, he has been Associate Professor in the Department of Mechanical Engineering of the Faculty of Engineering at Celal Bayar University in Manisa, Turkey.

Mehmet Ayvaz, born 1985, acquired his BSc in Mechanical Engineering in 2008 and his MSc in Mechanical Engineering in 2010. Since 2012, he is Research Assistant in the Department of Mechanical Engineering of the Faculty of Engineering at the Celal Bayar University in Manisa, Turkey.

Presented during the 3^rd International Conference on Welding Technologies and Exhibition (ICWET'14) in Manisa, Turkey

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Published Online: 2014-10-11

Published in Print: 2014-10-01

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https://doi.org/10.3139/120.110647