Weld Metal Grain Refinement of Aluminium Alloy 5083 through Controlled Additions of Ti and B
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Philipp Schempp
Abstract
The refinement of the weld metal grain structure may lead to a significant change in its mechanical properties and in the weldability of the base metal. One possibility to achieve weld metal grain refinement is the inoculation of the weld pool. In this study, it is shown how additions of titanium and boron influence the weld metal grain structure of GTA welds of the aluminium alloy 5083 (Al Mg4.5Mn0.7). For this purpose, inserts consisting of base metal and additions of the master alloy Al Ti5B1 have been cast, deposited in the base metal and fused in a GTA welding process. The increase of the Ti and B content led to a significant decrease of the weld metal mean grain size and to a change in grain shape. The results provide a basis for a more precise definition of the chemical composition of commercial filler wires and rods for aluminium arc welding.
Kurzfassung
Kornfeinung im Schweißgut kann die mechanischen Eigenschaften der Schweißnaht und die Schweißeignung des Grundwerkstoffs deutlich verbessern. Eine Möglichkeit korngefeintes Schweißgut zu erreichen, ist das Versetzen des Schmelzbades mit kornfeinenden Mitteln. In dieser Studie wird gezeigt wie Titan- und Borzusätze Korngröße und -struktur von WIG-Schweißnähten der Al-Legierung 5083 (Al Mg4,5Mn0,7) beeinflussen. Dazu wurden in einem Gießprozess stäbchenförmige Einlagen hergestellt, die aus Grundwerkstoff und definierten Zusätzen der Kornfeinungslegierung Al Ti5B1 bestanden. Sie wurden als Ersatz für einen Schweißzusatzwerkstoff in einer Nut im Grundwerkstoff untergebracht und im WIG-Verfahren überschweißt. Durch die Steigerung des Titan- und Borgehalts im Schweißgut konnte dessen mittlere Korngröße deutlich verringert werden. Außerdem wurde eine Änderung der Kornstruktur beobachtet. Die Ergebnisse können als Grundlage genutzt werden, um die empfohlene chemische Zusammensetzung von Schweißzusätzen für Lichtbogenschweißen von Aluminium anzupassen.
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© 2011, Carl Hanser Verlag, München
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- DIN EN ISO 6892-1:2009 Der Zugversuch — Erste Erfahrungen aus der praktischen Umsetzung der neuen Norm*
- EN ISO 6892-1:2009 Tensile Testing: Initial Experience from the Practical Implementation of the New Standard*
- Weld Metal Grain Refinement of Aluminium Alloy 5083 through Controlled Additions of Ti and B
- TIG Riveting of Temperature Sheath Microprobe
- Einfluss der Mikrostruktur auf den Druck- und Zug-E-Modul teilkristalliner Kunststoffe
- A Novel Approach for Quantitative Measurement of the Slag Penetration Area in Refractories by Using Computer Aided Image Analysis
- Effects of Thermal Oxidation and Subsequent Pickling on Pitting Geometry of Austentitic Stainless Steels in Chloride Solutions
- Plasmagestützte Ionisations-spektroskopie (PGIS) zur Materialanalyse
- Arbeitswalzen aus Keramik zum Walzen von dünnen Stahlfolien im 20-Walzen-Sendzimirgerüst
- Magnesium Applications for Fuel Economy and Energy Production
- The Investigation of Graphite Distribution on Diffusion Bonding of the AISI 1030 Low Carbon Steel with Nodular Cast Iron
- Kalender/Calendar
- Kalender
- Vorschau/Preview
- Vorschau
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- DIN EN ISO 6892-1:2009 Der Zugversuch — Erste Erfahrungen aus der praktischen Umsetzung der neuen Norm*
- EN ISO 6892-1:2009 Tensile Testing: Initial Experience from the Practical Implementation of the New Standard*
- Weld Metal Grain Refinement of Aluminium Alloy 5083 through Controlled Additions of Ti and B
- TIG Riveting of Temperature Sheath Microprobe
- Einfluss der Mikrostruktur auf den Druck- und Zug-E-Modul teilkristalliner Kunststoffe
- A Novel Approach for Quantitative Measurement of the Slag Penetration Area in Refractories by Using Computer Aided Image Analysis
- Effects of Thermal Oxidation and Subsequent Pickling on Pitting Geometry of Austentitic Stainless Steels in Chloride Solutions
- Plasmagestützte Ionisations-spektroskopie (PGIS) zur Materialanalyse
- Arbeitswalzen aus Keramik zum Walzen von dünnen Stahlfolien im 20-Walzen-Sendzimirgerüst
- Magnesium Applications for Fuel Economy and Energy Production
- The Investigation of Graphite Distribution on Diffusion Bonding of the AISI 1030 Low Carbon Steel with Nodular Cast Iron
- Kalender/Calendar
- Kalender
- Vorschau/Preview
- Vorschau