Industries today face challenges in incorporating metallic additively manufactured lattice structures in critical components subjected to fatigue loading. This work explores the relationship between fatigue properties and the printing orientation of Laser-Powered Bed Fusion (LPBF) lattice structures. This rela- tion is at the base of a cost-effective and time-efficient optimization workflow able to determine the opti- mal lattice printing orientation for improved fatigue life. Fatigue resistance is tested under uniaxial conditions on miniaturized specimens that mimic the lattice sub-unit elements: struts and nodes. The collected data is used as input for the optimization algorithm to determine the specimen orientation that maximizes fatigue life. The optimized specimens are manufactured, tested under three-point-bending conditions, and analysed using metrological x-ray computed tomography to verify the improvement. The proposed workflow is able to produce a 24 % increase in specimen fatigue life by simply adjusting the orientation on the printing plane.

Efficient optimization framework for L-PBF fatigue enhanced Ti6Al4V lattice component / De Biasi, Raffaele; Murchio, Simone; Sbettega, Elia; Carmignato, Simone; Luchin, Valerio; Benedetti, Matteo. - In: MATERIALS & DESIGN. - ISSN 0264-1275. - STAMPA. - 230:(2023), p. 111975. [10.1016/j.matdes.2023.111975]

Efficient optimization framework for L-PBF fatigue enhanced Ti6Al4V lattice component

De Biasi, Raffaele
Primo
;
Murchio, Simone
Secondo
;
Luchin, Valerio;Benedetti, Matteo
Ultimo
2023-01-01

Abstract

Industries today face challenges in incorporating metallic additively manufactured lattice structures in critical components subjected to fatigue loading. This work explores the relationship between fatigue properties and the printing orientation of Laser-Powered Bed Fusion (LPBF) lattice structures. This rela- tion is at the base of a cost-effective and time-efficient optimization workflow able to determine the opti- mal lattice printing orientation for improved fatigue life. Fatigue resistance is tested under uniaxial conditions on miniaturized specimens that mimic the lattice sub-unit elements: struts and nodes. The collected data is used as input for the optimization algorithm to determine the specimen orientation that maximizes fatigue life. The optimized specimens are manufactured, tested under three-point-bending conditions, and analysed using metrological x-ray computed tomography to verify the improvement. The proposed workflow is able to produce a 24 % increase in specimen fatigue life by simply adjusting the orientation on the printing plane.
2023
De Biasi, Raffaele; Murchio, Simone; Sbettega, Elia; Carmignato, Simone; Luchin, Valerio; Benedetti, Matteo
Efficient optimization framework for L-PBF fatigue enhanced Ti6Al4V lattice component / De Biasi, Raffaele; Murchio, Simone; Sbettega, Elia; Carmignato, Simone; Luchin, Valerio; Benedetti, Matteo. - In: MATERIALS & DESIGN. - ISSN 0264-1275. - STAMPA. - 230:(2023), p. 111975. [10.1016/j.matdes.2023.111975]
File in questo prodotto:
File Dimensione Formato  
MD2023.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 3.82 MB
Formato Adobe PDF
3.82 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/377113
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 16
  • OpenAlex ND
social impact