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Advances in Large-Scale Metal 3D Printing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Additive Manufacturing Technologies".

Deadline for manuscript submissions: closed (20 March 2023) | Viewed by 2842

Special Issue Editors


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Guest Editor
Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
Interests: seismic design; dissipative devices; steel structures; additive manufacturing
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy
Interests: seismic design; dissipative devices; steel structures; additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The growth of automation since the beginning of the 21st century has prevailed in almost all production domains with the exception of large-scale applications (aerospace, construction, marine, etc.), in which the use of automatic tools is still challenging and at its first application stage.

Recent reviews of metal additive manufacturing processes distinguish them into three major categories: (i) powder bed fusion (PBF); (ii) directed energy deposition (DED); and (iii) sheet lamination.

In recent years, research effort has been intensively dedicated to the study of PBF material fabrication. The PBF process, although presenting small geometrical imperfections and mechanical characteristics in the order of traditional stainless-steel material, is limited by the build envelope of the equipment, which is typically a 250 mm cube. On the other hand, DED processes lie upon a more flexible building set-up, allowing for the realization of elements without theoretical dimensional constraints. For such reason, it appears more suitable for large-scale applications, for which the outputs requested are of the order of several meters (typically 3 to 5 m long). However, in order to obtain pieces of large dimensions, higher printing velocities are required, resulting in larger geometrical imperfections with respect to the digital model. Therefore, much effort is needed for a proper assessment of both the geometrical and mechanical characterization of the outputs.

To cover this topic and to provide a well-documented reference in this field, authors are invited to present their recent research results to this Special Issue. Suitable topics include, but are not limited to, the following:

  • Material characterization of metal AM;
  • Advanced design processes for metal AM;
  • Applications of large-scale metal AM;
  • Design requirements for large-scale metal AM components.

Dr. Giada Gasparini
Dr. Vittoria Laghi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • DED process
  • metal 3D printing
  • mechanical characterization
  • large-scale components

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Published Papers (1 paper)

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Research

18 pages, 21881 KiB  
Article
Comparison between Eight-Axis Articulated Robot and Five-Axis CNC Gantry Laser Metal Deposition Machines for Fabricating Large Components
by Simone Maffia, Federico Chiappini, Gianluca Maggiani, Valentina Furlan, Massimo Guerrini and Barbara Previtali
Appl. Sci. 2023, 13(9), 5259; https://doi.org/10.3390/app13095259 - 23 Apr 2023
Cited by 3 | Viewed by 2287
Abstract
Laser metal deposition (LMD) is an additive manufacturing (AM) process capable of producing large components for the aerospace and oil and gas industries. This is achieved by mounting the deposition head on a motion system, such as an articulated robot or a gantry [...] Read more.
Laser metal deposition (LMD) is an additive manufacturing (AM) process capable of producing large components for the aerospace and oil and gas industries. This is achieved by mounting the deposition head on a motion system, such as an articulated robot or a gantry computer numerical control (CNC) machine, which can scan large volumes. Articulated robots are more flexible and less expensive than CNC machines, which on the other hand, are more accurate. This study compares two LMD systems with different motion architectures (i.e., an eight-axis articulated robot and a five-axis CNC gantry machine) in producing a large gas turbine axisymmetric component. The same process parameters were applied to both machines. The deposited components show no significant differences in geometry, indicating that the different performances in terms of accuracy of the two machines do not influence the outcome. The findings indicate that LMD can consistently produce large-scale axisymmetric metal components with both types of equipment. For such an application, the user has the option of using an articulated robot when flexibility and cost are essential, such as in a research context, or a CNC machine where ease of programming and process standardization are important elements, such as in an industrial environment. Full article
(This article belongs to the Special Issue Advances in Large-Scale Metal 3D Printing)
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