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Erschienen in: Journal of Materials Engineering and Performance 10/2021

11.08.2021

Dissimilar Laser Beam Welding of AISI 420 Martensitic Stainless Steel to AISI 2205 Duplex Stainless Steel: Effect of Post-Weld Heat Treatment on Microstructure and Mechanical Properties

verfasst von: Ceyhun Köse

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 10/2021

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Abstract

In this study, AISI 420 martensitic stainless steel to AISI 2205 duplex stainless steel sheets were joined with laser welding. Post-weld heat treatment was applied to a laser-welded joint. Microhardness, tensile, and impact tests were carried out to determine mechanical properties of a welded joint. Microstructure characterization was performed in a detailed way by using macroscope, optical microscope, SEM-EDS, XRD, and EBSD analyses. The results indicate that retained austenite phase fraction increased with the effect of heat treatment in the microstructure of martensitic stainless steel, and austenite phase fraction increased in the microstructure of duplex stainless steel. They also show that tensile strength of heat-treated martensitic and duplex stainless steel base metals, and heat-treated welded joint improved, but their impact toughness decreased. However, tensile strength of welded joint was lower in comparison with base metal. Chromium-carbide (Cr23C6) was observed in weld metal of heat-treated martensitic and duplex stainless steel with XRD and EBSD analysis. Porosity and carbide formations, which were observed in macro- and microstructure images, are considered as the main reason for the decrease in mechanical strength of the welded joint. There were no cracks and sigma phase formations in microstructure investigations.

Graphical Abstract

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Literatur
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Zurück zum Zitat ASTM-E8M (2003) Standard Test Methods of Tension Testing of Metallic Materials [metric], Annual book of ASTM standards, vol 3.01. American Society for Testing and Materials, USA ASTM-E8M (2003) Standard Test Methods of Tension Testing of Metallic Materials [metric], Annual book of ASTM standards, vol 3.01. American Society for Testing and Materials, USA
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Zurück zum Zitat ASTM- A370 (2015) Standard test methods and definitions for mechanical testing of steel products, Annual book of ASTM standarts, vols. 20-29, American Society for Testing and Materials, USA ASTM- A370 (2015) Standard test methods and definitions for mechanical testing of steel products, Annual book of ASTM standarts, vols. 20-29, American Society for Testing and Materials, USA
Metadaten
Titel
Dissimilar Laser Beam Welding of AISI 420 Martensitic Stainless Steel to AISI 2205 Duplex Stainless Steel: Effect of Post-Weld Heat Treatment on Microstructure and Mechanical Properties
verfasst von
Ceyhun Köse
Publikationsdatum
11.08.2021
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 10/2021
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-021-06071-x

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