Special Issue "Additive Manufacturing: Accuracy, Suitability, Sustainability and Costs"

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 31 January 2020.

Special Issue Editor

Guest Editor
Prof. Dr. Francisco J. G. Silva Website E-Mail
ISEP–School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
Interests: manufacturing processes; material properties; microhardness; microstructures; hard coatings; wear; friction

Special Issue Information

Dear Colleagues,

Additive manufacturing is an emerging manufacturing process with huge potential. Many studies have recently been developed regarding the different approaches already made in terms of technology. However, in order to better explore the most recent developments, it is also necessary to study important aspects such as the accuracy of each technology, their suitability for particular applications, how the processes are sustainable, and the development of models able to predict the production cost regarding different technologies and equipment, as well as material, geometry of the parts, filling characteristics, and so on. This Special Issue intends to disseminate recent high-quality studies in this field, regarding the production of metallic parts by additive manufacturing. Theoretical and experimental works will be welcome, highlighting the differences between technologies and characteristics of the parts.

Prof. Francisco J. G. Silva
Guest Editor

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 papers will be 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. Metals is an international peer-reviewed open access monthly 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 1500 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.


  • additive manufacturing
  • direct metal deposition
  • 3D printing of metal alloys
  • costs
  • accuracy
  • sustainability
  • direct metal laser sintering
  • laser powder bed fusion

Published Papers (1 paper)

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Open AccessArticle
Research on Four-Point Air Bending Process and Contour Detection Method for JCO Forming Process of LSAW Pipes
Metals 2019, 9(8), 859; https://doi.org/10.3390/met9080859 - 06 Aug 2019
Aiming at the forming efficiency and roundness of the longitudinal submerged arc welded (LSAW) pipes in JCO (J-shape to C-shape to O-shape) forming process, this paper proposes a four-point air bending process. Compared with the traditional three-point air bending process, The new process [...] Read more.
Aiming at the forming efficiency and roundness of the longitudinal submerged arc welded (LSAW) pipes in JCO (J-shape to C-shape to O-shape) forming process, this paper proposes a four-point air bending process. Compared with the traditional three-point air bending process, The new process can provide a more uniform bending moment, does not need to crimp the edges of steel sheet, shorten the residual straight segment length, and lengthen the forming length in single pass. The mechanical model is established to analyze the static equilibrium conditions and elastic–plastic deformation. The process is simulated by using the software package ABAQUS, to find the maximum punch spacing, and further determine the formulation principles of other process parameters. In addition, a contour detection method for the LSAW pipes in forming process is proposed based on machine vision (planar-array CCD camera produced by Gray Point Corporation, Vancouver, Canada). This method can not only quickly detect the contour of each pass, but also splice the detected contours together to obtain the overall contour with the given splicing algorithm. According to the measured contour, the bending angle, radius, and roundness can be calculated, to correct the punch reduction in the next pass and improve the forming accuracy of the pipes. Finally, an experimental system is designed to verify the proposed four-point bending JCO forming process and contour detection method. The result shows that the error between the contour detection method and CMM (coordinate measuring machine) is less than 0.5% for the overall contour, the two experimental pipes require 13 and 15 passes respectively, the roundness of pipes are less than 1.1%, which is much better than that of traditional three-point bending JCO forming process. Full article
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