Microstructural Characterization of Martensitic All-Weld Metal Samples
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P. Haslberger
Abstract
The development of welding consumables is permanently challenged with matching the increasing strength and toughness of thermomechanically treated or quenched and tempered steels. A martensitic microstructure offers promising prospects to guarantee such requirements in the all-weld metal as well. A thorough characterization of the microstructure is indispensable to understand its effects on the mechanical properties. This paper shall summarize how light optical microscopy and electron backscatter diffraction can be used to deepen the understanding of fully martensitic weld metal. It was found that electron backscatter diffraction offers a variety of information that light optical microscopy cannot deliver, particularly regarding the prior austenite grain structure. Grain sizes of the primary dendrites, the prior austenite grains and the martensitic structure can be measured with a combination of these techniques.
Kurzfassung
Bei der Entwicklung von Schweißzusätzen werden für thermomechanisch behandelte oder vergütete Stähle mit stetig steigender Festigkeit und Zähigkeit entsprechend geeignete mechanische Gütewerte gefordert. Ein martensitisches Gefüge bietet für die Erfüllung solcher Anforderungen auch im reinen Schweißgut vielversprechende Perspektiven. Eine eingehende Gefügecharakterisierung ist unverzichtbar für das Verständnis der Auswirkungen des Gefüges auf die mechanischen Eigenschaften. Diese Arbeit erklärt zusammenfassend, wie Lichtmikroskopie und Elektronenrückstreubeugung genutzt werden können, um ein tieferes Verständnis vollständig martensitischen Schweißgutes zu gewinnen. Es konnte festgestellt werden, dass Elektronenrückstreubeugung eine Vielzahl an Informationen liefert, die die Lichtmikroskopie nicht liefern kann, insbesondere im Bezug auf die ehemalige Austenitkornstruktur. Korngrößen primärer Dendriten, der ehemaligen austenitischen Körner und des martensitischen Gefüges können durch eine Kombination dieser Techniken vermessen werden.
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© 2017, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Editorial
- Editorial
- Technical Contributions/Fachbeiträge
- 30 Years of Component Metallography in the DGM Materialography Technical Committee
- Microstructural Characterization of Martensitic All-Weld Metal Samples
- Effects of Sintering Temperature and Time on the Properties of Al-Cu PM Alloy
- Failure Analysis
- Intergranular Corrosion in Unserviced Austenitic Stainless Steel Pipes Made of Alloy 904L
- Meeting Diary/Veranstaltungskalender
- Meeting Diary
Articles in the same Issue
- Contents/Inhalt
- Contents
- Editorial
- Editorial
- Technical Contributions/Fachbeiträge
- 30 Years of Component Metallography in the DGM Materialography Technical Committee
- Microstructural Characterization of Martensitic All-Weld Metal Samples
- Effects of Sintering Temperature and Time on the Properties of Al-Cu PM Alloy
- Failure Analysis
- Intergranular Corrosion in Unserviced Austenitic Stainless Steel Pipes Made of Alloy 904L
- Meeting Diary/Veranstaltungskalender
- Meeting Diary
