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Weldability of dissimilar metal welds of innovative high and medium entropy alloys to austenitic stainless steels joint by tungsten inert gas and friction stir welding

  • The new multi-element alloying concept of systems with defined entropy (HEA - High Entropy Alloy or MEA - Medium Entropy Alloy) is increasing in materials research interest. Improved properties or combinations of properties are shown by several systems. Thus, the resulting microstructures and production of HEA/MEA as well as properties have been primarily investigated so far. Furthermore, processing is a key issue to transfer HEA/MEA systems to real components. Since welding is the most important joining process for metals, it is crucial to investigate the influence of welding to guarantee component integrity. Since most HEA are made of expensive alloying elements such as Co or Ni, they will not be used entirely as structural materials. Thus, it can be advantageous to weld conventional alloys such as austenitic stainless steels with the HEA and MEA to produce components that are both application-oriented and economically viable. Therefore, in this paper, first results of dissimilarThe new multi-element alloying concept of systems with defined entropy (HEA - High Entropy Alloy or MEA - Medium Entropy Alloy) is increasing in materials research interest. Improved properties or combinations of properties are shown by several systems. Thus, the resulting microstructures and production of HEA/MEA as well as properties have been primarily investigated so far. Furthermore, processing is a key issue to transfer HEA/MEA systems to real components. Since welding is the most important joining process for metals, it is crucial to investigate the influence of welding to guarantee component integrity. Since most HEA are made of expensive alloying elements such as Co or Ni, they will not be used entirely as structural materials. Thus, it can be advantageous to weld conventional alloys such as austenitic stainless steels with the HEA and MEA to produce components that are both application-oriented and economically viable. Therefore, in this paper, first results of dissimilar metal welding, by tungsten inert gas- (TIG) and friction stir welding (FSW), of a CoCrFeMnNi HEA as well as a CoCrNi MEA with a conventional AISI 304 austenitic stainless steel are presented. The focus is on the microstructure formation due to the two welding processes. The results of TIG welding show a dendritic microstructure, whereas in FSW both materials are stirred but still coexist.zeige mehrzeige weniger

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Metadaten
Autor*innen:Tim Richter
Koautor*innen:Kjell Erxleben, Michael Rhode, Dirk Schröpfer
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Deutsch
Jahr der Erstveröffentlichung:2022
Organisationseinheit der BAM:9 Komponentensicherheit
9 Komponentensicherheit / 9.0 Abteilungsleitung und andere
9 Komponentensicherheit / 9.2 Versuchsanlagen und Prüftechnik
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:High Entropy Alloy; Medium Entropy Alloys; Welding microstructure
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Degradation von Werkstoffen
Veranstaltung:75th IIW Annual Assembly
Veranstaltungsort:Tokyo, Japan
Beginndatum der Veranstaltung:17.07.2022
Enddatum der Veranstaltung:22.02.2022
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:04.08.2022
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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