Deformation Character of the Aluminum Alloy AA 6063 Depending on the Homogenization State

Ergün Kelesoglu; Yaman Erarslan; Gökhan Özer

doi:10.3139/120.110048

Article

Deformation Character of the Aluminum Alloy AA 6063 Depending on the Homogenization State

Ergün Kelesoglu , Yaman Erarslan and Gökhan Özer

Published/Copyright: May 28, 2013

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From the journal Materials Testing Volume 51 Issue 6

Abstract

In the work for this contribution, homogenization heat treatment was evaluated with respect to its effect on deformation ability of AA6063 aluminum alloy which is a widely used extrusion alloy. The samples machined from extrusion billets were homogenized at 540°C, 560°C and 580°C for a time period of 2, 4, 6, 8 and 10 h. The homogenization state of the samples was assessed via microstructure examination. The hardness of the samples was determined using Brinell hardness method. Tensile test was carried out in order to evaluate the deformation ability. Tensile strength and elongation at rupture were compared depending on the homogenization state of the alloy. Depending on the homogenization grade, the elongation at rupture was increased, and samples showed a gradual shift from brittle fracture to ductile fracture.

Kurzfassung

Für den vorliegenden Beitrag wurde die Wärmebehandlung zur Homogenisierung der weitläufig als Extrusionswerkstoff verwendeten Aluminiumlegierung AA6063 hinsichtlich ihrer Wirkung auf das Verformungsvermögen untersucht. Die aus den Extrusionstücken herausgearbeiteten Proben wurden hierzu bei den Temperaturen 540°C, 560°C und 580°C für eine Zeitdauer von 2, 4, 6, 8 und 10 h homogenisiert. Der Homogenisierungszustand der Proben wurde mittels Gefügeuntersuchungen festgestellt. Die Härte der Proben wurde mit dem Brinellverfahren ermittelt. Um das Verformungsvermögen zu evaluieren wurden Zugversuche durchgeführt. Die Zugfestigkeit und die Verlängerung bis zum Bruch wurden für die verschiedenen Homogenisierungszustände der Legierung verglichen. Abhängig vom Grad der Homogenisierung fehlt die Verlängerung bis zum Bruch und die Proben weisen einen graduellen Übergang von sprödem zu duktilem Bruch auf.

Ergün Kelesoglu, born in 1968, received his PhD at the University of Leoben, Austria, in 1998. Presently, he is Assistant Professor in the Metallurgical and Materials Engineering at Yildiz Technical University (YTU) in Istanbul, Turkey. He also is Vice Director in the Research and Development Centre for Industrial Cooperation in YTU. His research fields cover the heat treatment of Aluminum alloys.

Yaman Erarslan, born in 1961, received his PhD at the Yildiz Technical University in 2000. Presently, he is Assistant Professor in the Metallurgical and Materials Engineering at Yildiz Technical University. His PhD thesis covers the Alluminum alloy design for extrusion technology. His research areas cover Aluminum extrusion alloys and Aluminum matrix composites.

Gökhan Özer, born in 1978, is research assistant at the Yildiz Technical University since 2002. He is also co-researcher in the Balkan Centre of Advanced Casting Technologies (BCACT). Presnetly, he is PhD student in the casting of non-ferrous metals.

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Published Online: 2013-05-28

Published in Print: 2009-06-01

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https://doi.org/10.3139/120.110048