Design of additively manufactured components based on locally representative material fatigue properties
- S. Blasón 1
- M. Chaudry 1
- A. Elorriaga 12
- M. Madia 1
- I. Llavori 2
- K. Hilgenberg 1
- 1 Bundesanstalt für Materialforschung und -prüfung (BAM)
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2
Universidad de Mondragón/Mondragon Unibertsitatea
info
ISSN: 2792-4246
Ano de publicación: 2022
Número: 4
Páxinas: 195-200
Tipo: Artigo
Outras publicacións en: Revista española de mecánica de la fractura
Resumo
Additive manufacturing (AM) technology continues to make progress and allows for reaching increasingly complex and optimised designs. The chemical industry is one of the sectors where AM components have acquired relevance. There is a lack of any European directive in order to regulate the inspection, certification as well as acceptance of additively manufactured (AM) equipment subjected to pressure loads, so progression in this line becomes necessary. This work aimed to develop a design methodology for AM components based on the estimation of fatigue lifetime on those regions with a higher risk of failure. Diverse facets are involved in this study, including numerical simulations, microstructure analysis and an extensive experimental campaign. The fatigue assessment is performed based on fracture mechanics. The microstructure characteristics are dependent on the thermal history along the manufacturing process for each region and, accordingly, the mechanical properties are likewise influenced. Preliminary results of an ongoing research project for characterizing the mechanical properties in demonstrator pressure vessels produced by laser powder bed fusion (L-PBF) on stainless steel 316L are presented. The preliminary findings obtained in terms of fatigue crack growth rate (FCGR) and are detailed. Results from specimens extracted from different regions of the vessel are compared.