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Heat Treatment of Additive Manufacturing-Processed Alloys

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: 20 August 2024 | Viewed by 1173

Special Issue Editors


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Guest Editor
DISAT - Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy
Interests: research and development of new alloys for additive manufacturing processes
Special Issues, Collections and Topics in MDPI journals

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Guest Editor Assistant
DISAT - Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy
Interests: research and development of new lightweight alloys tailored to the PBF-LB/M process

Special Issue Information

Dear Colleagues,

Metal additive manufacturing, commonly referred to as AM, creates 3D metal parts layer by layer using a digital design model. Due to the nature of AM processes, the resulting parts could be characterised by heterogeneous microstructures and a high level of internal stress. In order to modify the part microstructure and relieve any residual stresses present, enabling parts to achieve properties comparable to or even better than their conventionally manufactured counterparts, post-processing heat treatment may be required.

However, the heat treatments of AM alloys are different from those adopted after conventional processes and therefore require an ad hoc study, thus leading to a time-consuming procedure. For this reason, many studies are currently focusing on the development of alloys tailored for AM processes that do not require heat treatment.

The aim of this Special Issue is to collect the most innovative heat treatments with a critical analysis of their effects on microstructural features, thermophysical properties and mechanical behaviour of the treated alloy. In addition, this Special Issue also focuses on the development of new alloys that do not require post-processing treatments, with an emphasis on the stability of these materials when working at high temperatures.

Prof. Dr. Paolo Fino
Guest Editor
Dr. Alessandra Martucci
Guest Editor Assistant

Manuscript Submission Information

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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. Materials 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 2600 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

  • heat treatment tailored for AM-processed components
  • influence of different additive processes on heat treatments
  • development of novel alloys without heat treatment
  • effects of heat treatment on microstructural features
  • advances microstructural analyses
  • mechanical characterization

Published Papers (1 paper)

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Research

14 pages, 3765 KiB  
Article
Surface Finishing and Coating Parameters Impact on Additively Manufactured Binder-Jetted Steel–Bronze Composites
by Andrew C. Grizzle, Amy Elliott, Kate L. Klein and Pawan Tyagi
Materials 2024, 17(3), 598; https://doi.org/10.3390/ma17030598 - 26 Jan 2024
Viewed by 598
Abstract
In this paper, electroless nickel plating is explored for the protection of binder-jetting-based additively manufactured (AM) composite materials. Electroless nickel plating was attempted on binder-jetted composites composed of stainless steel and bronze, resulting in differences in the physicochemical properties. We investigated the impact [...] Read more.
In this paper, electroless nickel plating is explored for the protection of binder-jetting-based additively manufactured (AM) composite materials. Electroless nickel plating was attempted on binder-jetted composites composed of stainless steel and bronze, resulting in differences in the physicochemical properties. We investigated the impact of surface finishing, plating solution chemistry, and plating parameters to attain a wide range of surface morphologies and roughness levels. We employed the Keyence microscope to quantitatively evaluate dramatically different surface properties before and after the coating of AM composites. Scanning electron microscopy revealed a wide range of microstructural properties in relation to each combination of surface finishing and coating parameters. We studied chempolishing, plasma cleaning, and organic cleaning as the surface preparation methods prior to coating. We found that surface preparation dictated the surface roughness. Taguchi statistical analysis was performed to investigate the relative strength of experimental factors and interconnectedness among process parameters to attain optimum coating qualities. The quantitative impacts of phosphorous level, temperature, surface preparation, and time factor on the roughness of the nickel-plated surface were 17.95%, 8.2%, 50.02%, and 13.21%, respectively. On the other hand, the quantitative impacts of phosphorous level, temperature, surface preparation, and time factor on the thickness of nickel plating were 35.12%, 41.40%, 3.87%, and 18.24%, respectively. The optimum combination of the factors’ level projected the lowest roughness of Ra at 7.76 µm. The optimum combination of the factors’ level projected the maximum achievable thickness of ~149 µm. This paper provides insights into coating process for overcoming the sensitivity of AM composites in hazardous application spaces via robust coating. Full article
(This article belongs to the Special Issue Heat Treatment of Additive Manufacturing-Processed Alloys)
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