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Bewertung des Einflusses prozessbedingter Inhomogenitäten auf die Ermüdungsfestigkeit von additiv gefertigtem AlSi10Mg mit Hilfe des Kitagawa-Takahashi-Diagramms

Das laserbasierte Pulverbettschmelzen (PBF-LB) ist ein weit verbreiteter additiver Fertigungsprozess, der für seine Präzision, Individualisierbarkeit und Funktionsintegration bekannt ist. Der Einsatz von Lasertechnologie führt jedoch zu Herausforderungen, wie hoher Wärmeleitfähigkeit, die wiederum Wärmegradienten, Eigenspannungen, Anisotropie und Inhomogenitäten verursacht, welche die Ermüdungsfestigkeit und strukturelle Integrität von PBF-LB-Komponenten erheblich beeinträchtigen.

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Die vorgestellte Studie untersucht den Einfluss der prozessbedingt eingebrachten Inhomogenitäten auf die Ermüdungsfestigkeit von PBF-LB/M/AlSi10Mg-Bauteilen, mit und ohne nachgelagerter Wärmebehandlung. Zur Bewertung dieser Inhomogenitäten wird das Kitagawa-Takahashi-Diagramm herangezogen, um kritische Inhomogenitätsgrößen unter zyklischer Belastung zu beurteilen und den Übergang zwischen bruchauslösenden und nicht-bruchauslösenden Inhomogenitäten zu definieren. Um diesen Übergang präzise bestimmen zu können, wurde das Rissfortschrittsverhalten analysiert und der Ansatz von El Haddad angewendet. Eine eingehende Untersuchung der kritischen Inhomogenitäten der Durchläufer ermöglicht eine detaillierte Beschreibung dieser Übergangslinie, wodurch die Defektgröße und Streuung im Kitagawa-Takahashi-Diagramm präzise dargestellt werden können.

Reference: ADD-2024-451

Title: Bewertung des Einflusses prozessbedingter Inhomogenitäten auf die Ermüdungsfestigkeit von additiv gefertigtem AlSi10Mg mit Hilfe des Kitagawa-Takahashi-Diagramms
Author(s): L. Strauß, A. Spangler, G. Löwisch
DOI: 10.48447/ADD-2024-451
Event: DVM-Arbeitskreis Arbeitskreis Additiv gefertigte Bauteile und Strukturen - Tagung 2024
Year of publication: 2024
Publication type: conference paper (PDF)
Language: German
Keywords: AlSi10Mg,Ermüdungsfestigkeit,PBF-LB/M,Kitagawa-Takahashi-Diagramm

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Author(s): T. A. Danowski

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Parameterentwicklung für die stützstrukturfreie Fertigung von Überhanggeometrien aus Inconel 718 mittels des PBF-LB/M

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9. Tagung des DVM-Arbeitskreises Additiv gefertigte Bauteile und Strukturen

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1

Untersuchungen an additiv gefertigten Werkzeugeinsätzen mit reduzierten thermischen Massen für den variothermen Spritzgießprozess

Publication type: conference paper (PDF)

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    [2] => Array
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            [name] => DOI
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    [3] => Array
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1

German

€25.00

Online only