Metal Additive Manufacturing for the production of end parts is today the major interest in the field of layer-by-layer fabrication. Even if Powder Bed Fusion is by far the most diffused technology, powder-fed systems retain a specific attractiveness, mainly because they enable an easier manufacture of multi-material parts or even of composition-graded ones. These systems, recently categorized by ASTM standards under the term Directed Energy Deposition (DED), still suffer from scarce knowledge of part characteristics and of process robustness and repeatability. Among DED processes, Laser Consolidation (LC) allows the production of net-shape metal parts with good metallurgical soundness, high strength and ductility. As regards the mechanical performance, the non-coaxial architecture of the LC head poses the question of a secondary anisotropy, within each layer, in addition to the primary one that is due to the layerwise construction. The paper addresses the mechanical response and the microstructure obtained by LC with AISI 316L. The direction dependence of part properties is specifically explored. Remarkably high ductility, combined with high hardness and strength, are obtained. The effect of the relative orientation between the LC head and the part is quantified and associated with the observed microstructure.

Directed energy deposition of steel 316L: Effects of build orientation / Bassoli, Elena; Denti, Lucia; Gatto, Andrea; Sewell, Neil Thomas; Johns, Daniel. - In: INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY. - ISSN 0976-6340. - 9:8(2018), pp. 438-446.

Directed energy deposition of steel 316L: Effects of build orientation

Bassoli, Elena;Denti, Lucia;Gatto, Andrea;
2018

Abstract

Metal Additive Manufacturing for the production of end parts is today the major interest in the field of layer-by-layer fabrication. Even if Powder Bed Fusion is by far the most diffused technology, powder-fed systems retain a specific attractiveness, mainly because they enable an easier manufacture of multi-material parts or even of composition-graded ones. These systems, recently categorized by ASTM standards under the term Directed Energy Deposition (DED), still suffer from scarce knowledge of part characteristics and of process robustness and repeatability. Among DED processes, Laser Consolidation (LC) allows the production of net-shape metal parts with good metallurgical soundness, high strength and ductility. As regards the mechanical performance, the non-coaxial architecture of the LC head poses the question of a secondary anisotropy, within each layer, in addition to the primary one that is due to the layerwise construction. The paper addresses the mechanical response and the microstructure obtained by LC with AISI 316L. The direction dependence of part properties is specifically explored. Remarkably high ductility, combined with high hardness and strength, are obtained. The effect of the relative orientation between the LC head and the part is quantified and associated with the observed microstructure.
2018
9
8
438
446
Directed energy deposition of steel 316L: Effects of build orientation / Bassoli, Elena; Denti, Lucia; Gatto, Andrea; Sewell, Neil Thomas; Johns, Daniel. - In: INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY. - ISSN 0976-6340. - 9:8(2018), pp. 438-446.
Bassoli, Elena; Denti, Lucia; Gatto, Andrea; Sewell, Neil Thomas; Johns, Daniel
File in questo prodotto:
File Dimensione Formato  
IJMET_09_08_048.pdf

Open access

Tipologia: Versione pubblicata dall'editore
Dimensione 238.23 kB
Formato Adobe PDF
238.23 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1165282
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact