Impact Toughness of Friction Stir Welded Al-Mg Alloy*

Aleksandar Sedmak; Abdasalam Mohamed Mahdi Eramah; Srđan Tadić; Srđa Perković; Horia Dascau

doi:10.3139/120.110638

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Impact Toughness of Friction Stir Welded Al-Mg Alloy*

Aleksandar Sedmak , Abdasalam Mohamed Mahdi Eramah , Srđan Tadić , Srđa Perković und Horia Dascau

Veröffentlicht/Copyright: 11. Oktober 2014

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Aus der Zeitschrift Materials Testing Band 56 Heft 10

Abstract

Al-Mg 5083 alloy was friction stir welded by varying welding variables, i. e., rotational speed, traversal speed and tool tilt angle. Welded specimens have been tested by the instrumented Charpy test to evaluate total absorbed energy, as well as the energy for crack initiation and the energy for crack growth. Subsequently, the fracture surface was examined by optical and scanning electron microscopy (SEM) to evaluate surface type of fracture, and to correlate the microstructure with the impact energy. Based on this, the optimum windows of FSW parameters for Al-Mg 5083 alloy welding have been defined.

Kurzfassung

Die Al-Mg-Legierung 5083 wurde rührreibgeschweißt unter verschiedenen Schweißbedingungen, hierzu wurden Rotationsgeschwindigkeit, Traversengeschwindigkeit und Werkzeugneigungswinkel variiert. Die geschweißten Proben wurden im instrumentierten Charpy-Versuch getestet, um die absorbierte Energie sowie die Energie für die Rissinitiierung und die Energie für Risswachstum zu bestimmen. Anschließend wurde die Bruchoberfläche mittels Licht- und Rasterelektronenmikroskopie untersucht, um den Oberflächentyp des Bruches zu bestimmen und die Mikrostruktur mit der Schlagenergie zu korrelieren. Darauf basierend wurden optimale Parameterbereiche für die Rührreibschweißung von Al-Mg-Legierung 5083 definiert.

**Correspondence Address Prof. Dr. Aleksandar Sedmak, Faculty of Mechanical Engineering, University of Belgrade Kraljice Marije 16, 11000 Belgrade, Serbia, E-mail: asedmak@mas.bg.ac.rs

Prof. Dr. Aleksandar Sedmak is a full professor at the Faculty of Mechanical Engineering, University of Belgrade, Serbia. He teaches academic courses in welding technologies, Finite elements methods and mechanics of materials. He is also a head of the Innovation Center in the Faculty of Mechanical Engineering, University of Belgrade, Serbia.

Abdsalam Mohamed Mahdi Eramah was a PhD student at the Faculty of Mechanical Engineering, University of Belgrade, Serbia, at the time this paper was written. The areas of his professional interest cover materials science applications in the marine and petroleum industry.

Srdjan Tadić is a research fellow at the Innovation Centre of the Faculty of Mechanical Engineering, University of Belgrade, Serbia. His main scientific areas of interest are materials science and metallurgy.

Srdja Perković is a member of the research staff at the Military Institute in Belgrade, Serbia, and trained in mechanical testing in the materials sciences. His areas of interest also cover fatigue testing and the behavior of welded joints.

Horia Dascau is Head of the Education and Training Department at the National R&D Institute for Welding and Material Testing (ISIM) in Timisoara, Romania. His professional attention is directed towards the welding sciences.

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/10.3139/120.110638