Despite the great potential of additively manufactured (AM) metallic lattice materials, a comprehensive understanding of their mechanical behavior, particularly fatigue, has yet to be achieved. The role of the sub-unital lattice elements, that is, the struts and the nodes (or strut junctions), is rarely explored, even though it is well known that fatigue is a local phenomenon, determined by the small features of a structure (defects and local geometrical discontinuities). In this work, the mechanical behavior of nodes and struts has been investigated by designing laser powder bed fusion (L-PBF) Ti6Al4V single strut specimens, with a node placed in the central part of the gauge length. The specimens were manufactured according to four different building orientations, namely, 90°, 45°, 15°, and 0° to the build plane. The influence of the fillet radius at the node and of the printing direction on the fatigue strength has been examined.

On the effect of the node and building orientation on the fatigue behavior of L-PBF Ti6Al4V lattice structure sub-unital elements / Murchio, S.; Dallago, M.; Rigatti, A.; Luchin, V.; Berto, F.; Maniglio, D.; Benedetti, M.. - In: MATERIAL DESIGN & PROCESSING COMMUNICATIONS. - ISSN 2577-6576. - STAMPA. - 2021, 3:6(2021), pp. e258.1-e258.9. [10.1002/mdp2.258]

On the effect of the node and building orientation on the fatigue behavior of L-PBF Ti6Al4V lattice structure sub-unital elements

Murchio S.;Dallago M.;Rigatti A.;Luchin V.;Maniglio D.;Benedetti M.
2021-01-01

Abstract

Despite the great potential of additively manufactured (AM) metallic lattice materials, a comprehensive understanding of their mechanical behavior, particularly fatigue, has yet to be achieved. The role of the sub-unital lattice elements, that is, the struts and the nodes (or strut junctions), is rarely explored, even though it is well known that fatigue is a local phenomenon, determined by the small features of a structure (defects and local geometrical discontinuities). In this work, the mechanical behavior of nodes and struts has been investigated by designing laser powder bed fusion (L-PBF) Ti6Al4V single strut specimens, with a node placed in the central part of the gauge length. The specimens were manufactured according to four different building orientations, namely, 90°, 45°, 15°, and 0° to the build plane. The influence of the fillet radius at the node and of the printing direction on the fatigue strength has been examined.
2021
6
Murchio, S.; Dallago, M.; Rigatti, A.; Luchin, V.; Berto, F.; Maniglio, D.; Benedetti, M.
On the effect of the node and building orientation on the fatigue behavior of L-PBF Ti6Al4V lattice structure sub-unital elements / Murchio, S.; Dallago, M.; Rigatti, A.; Luchin, V.; Berto, F.; Maniglio, D.; Benedetti, M.. - In: MATERIAL DESIGN & PROCESSING COMMUNICATIONS. - ISSN 2577-6576. - STAMPA. - 2021, 3:6(2021), pp. e258.1-e258.9. [10.1002/mdp2.258]
File in questo prodotto:
File Dimensione Formato  
3. On the effect of the node and building orientation on thefatigue behavior of L-PBF Ti6Al4V lattice structuresub-unital elements.pdf

accesso aperto

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Creative commons
Dimensione 3.79 MB
Formato Adobe PDF
3.79 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/11572/312897
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 10
  • ???jsp.display-item.citation.isi??? ND
social impact