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Investigation of the chemical element distribution on the surface of duplex stainless steel welds using laser-induced breakdown spectroscopy (LIBS)

  • Duplex steels are high-alloyed, stainless steels. They offer some physical advantages over other stainless steels due to the balanced phase ratio of austenite and ferrite. During welding processes, when welding fumes and vaporized material condensates, different chemical elements can accumulate on the surface of the solidified weld. Then, the formation of a protective chromium oxide layer is no longer guaranteed and pitting corrosion can occur at these places. Previous work has shown that the accumulation of manganese and chromium on the surface of the heat-affected zone of the welded high-grade steel 304L can be measured by LIBS. We present the results of the optimization of LIBS parameters for precise thickness measurements of such thin films and for depth profile measurements Therefore, we used galvanically coated copper samples with known film thicknesses. The Concentration of manganese is reduced in the weld metal. This has a high impact on the metallografic structure of theDuplex steels are high-alloyed, stainless steels. They offer some physical advantages over other stainless steels due to the balanced phase ratio of austenite and ferrite. During welding processes, when welding fumes and vaporized material condensates, different chemical elements can accumulate on the surface of the solidified weld. Then, the formation of a protective chromium oxide layer is no longer guaranteed and pitting corrosion can occur at these places. Previous work has shown that the accumulation of manganese and chromium on the surface of the heat-affected zone of the welded high-grade steel 304L can be measured by LIBS. We present the results of the optimization of LIBS parameters for precise thickness measurements of such thin films and for depth profile measurements Therefore, we used galvanically coated copper samples with known film thicknesses. The Concentration of manganese is reduced in the weld metal. This has a high impact on the metallografic structure of the material.zeige mehrzeige weniger

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Metadaten
Autor*innen:Lukas QuackatzORCiD
Koautor*innen:Axel Griesche, Thomas Kannengießer
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2021
Organisationseinheit der BAM:9 Komponentensicherheit
9 Komponentensicherheit / 9.4 Integrität von Schweißverbindungen
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Duplex stainless steel; Evaporation; In situ measurement; LIBS; TIG welding
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Degradation von Werkstoffen
Veranstaltung:EMSLIBS 2021
Veranstaltungsort:Online meeting
Beginndatum der Veranstaltung:29.11.2021
Enddatum der Veranstaltung:02.12.2021
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:03.12.2021
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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