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Additive Manufacturing of Metals and Alloys: Microstructure and Mechanical Properties
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Additive Manufacturing of Metals and Alloys: Microstructure and Mechanical Properties

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

Deadline for manuscript submissions: 20 February 2025 | Viewed by 1248

Special Issue Editors

Dr. Federico Mazzucato

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Guest Editor
ARM laboratory, Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland (SUPSI), CH-6962 Lugano-Viganello, Switzerland
Interests: metal additive manufacturing; design for additive manufacturing; process optimization and engineering; functionally graded materials; high-entropy alloys
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Samuel Rey-Mermet

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Guest Editor
Institute of Systems Engineering, School of Engineering, HES-SO Valais-Wallis, Rue de l’Industrie 23, Sion, Switzerland
Interests: additive manufacturing; powder metallurgy; shape memory alloys; functional materials

Special Issue Information

Dear colleagues,

Over the past decade, metal additive manufacturing (AM) technologies have demonstrated to be fabrication processes enabling innovative engineering solutions which exhibit unprecedented performance advantages not achievable through more conventional manufacturing methods. AM metal structures and alloys, such as functionally graded materials, shape memory alloys and high-entropy alloys, fabricated exhibit innovative performance properties such as self-healing, excellent mechanical strength at high temperatures, shape memory effect, improved corrosion and wear resistance, and enhanced biocompatibility, increasing industrial impact in sectors such as aerospace, automotive, biomedical and power generation, outperforming the current engineering solutions.

This Special Issue will compile recent and innovative developments in the field of additive manufacturing of metal alloys and structures. The articles presented in this Special Issue will cover topics ranging from, but not limited to, AM high-entropy alloy optimisation and characterisation, AM functionally graded materials, AM advanced metals design and development, process and microstructural simulation, AM properties analysis and assessment, enabling advanced functionalities through metal AM techniques, among others. The topics are open to both basic and applied research with strong industrial interest, as well as for the development of applications.

Dr. Federico Mazzucato
Prof. Dr. Samuel Rey-Mermet
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. 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

  • metal additive manufacturing
  • high-entropy alloys
  • functionally graded materials
  • microstructure analysis
  • advanced functionalities
  • process simulation
  • process engineering
  • advanced metal alloys
  • mechanical properties

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Published Papers (2 papers)

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Research

14 pages, 11262 KiB  
Article
Effect of Co Addition on the Microstructure and Mechanical Properties of Sn-11Sb-6Cu Babbitt Alloy
by Zhan Cheng, Meng Wang, Bo Wang, Lei Zhang, Ting Zhu, Ningbo Li, Jifa Zhou and Fei Jia
Materials 2024, 17(22), 5494; https://doi.org/10.3390/ma17225494 - 11 Nov 2024
Viewed by 501
Abstract
A Babbitt alloy SnSb11Cu6 with 0–2.0 wt.% Co was synthesized using the induction melting process. This study examined the effect of cobalt (Co) on the microstructure, tensile properties, compressive properties, Brinell hardness, and wear properties of SnSb11Cu6 using optical microscopy (OM), scanning electron [...] Read more.
A Babbitt alloy SnSb11Cu6 with 0–2.0 wt.% Co was synthesized using the induction melting process. This study examined the effect of cobalt (Co) on the microstructure, tensile properties, compressive properties, Brinell hardness, and wear properties of SnSb11Cu6 using optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), a universal tensile testing machine, a Brinell hardness tester, and a wear testing machine. The results indicate that the optimal quantity of Co can enhance the microstructure of the Babbitt alloy and promote microstructure uniformity, with presence of Co3Sn2 in the matrix. With the increase in Co content, the tensile and compressive strength of the Babbitt alloy first increased and then decreased, and the Brinell hardness gradually increased with the increase in Co content. The presence of trace Co has a minimal effect on the dry friction coefficient of the Babbitt alloy. When the Co content exceeds 1.5 wt.%, the friction properties of the Babbitt alloy deteriorate significantly. The optimized Babbitt alloy SnSb11Cu6-1.5Co was subsequently fabricated into wires, followed by conducting cold metal transfer (CMT) surfacing experiments. The Co element can promote the growth of interfacial compounds. The microstructure at the interface of the Babbitt alloy/steel is dense, and there is element diffusion between it. The metallurgical bonding is good, and there are serrated compounds relying on the diffusion layer to extend to the direction of the additive layer with serrated compounds extending and growing from the diffusion layer to the additive layer. Overall, Babbitt alloys such as SnSb11Cu6 exhibit improved comprehensive properties when containing 1.5 wt.% Co. Full article
(This article belongs to the Special Issue Additive Manufacturing of Metals and Alloys: Microstructure and Mechanical Properties)
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13 pages, 5820 KiB  
Article
Effect of Laser Parameters on Fracture Properties of Laser-Repaired Cracks with Micro/NanoMaterial Addition: Multiscale Analysis
by Yinyin Li, Wei Jiang and Meiqiu Li
Materials 2024, 17(18), 4656; https://doi.org/10.3390/ma17184656 - 23 Sep 2024
Viewed by 505
Abstract
In laser crack repair processes, laser parameters have significant influence on repair quality. Improper combination of laser process parameters may result in defects—such as porosity, ablation, and coarse grain size—in remelted zones. A trans-scale computational model is established by combining crystal plasticity finite [...] Read more.
In laser crack repair processes, laser parameters have significant influence on repair quality. Improper combination of laser process parameters may result in defects—such as porosity, ablation, and coarse grain size—in remelted zones. A trans-scale computational model is established by combining crystal plasticity finite elements and variable-node finite elements. The influence of microstructure characteristics such as grain size and porosity of the repair layer on the cumulative plastic slip (CPS) on the dominant slip system at the meso-scale and the J-integral at the macro-scale is studied to explore the effect of laser process parameters on repair quality. The results show that when the laser power is 1800 W and the heating time is 0.5 s, the grain size and porosity of the repaired specimen are the smallest. The J-integral of the repaired specimen is more than 8% smaller than that of the unrepaired specimen and about 3% smaller than that of the repaired specimen, with a laser power of 2000 W and a heating time of 1 s. Pores increase the CPS of the crystal around the pores, especially when a pore have sharp corners. Selecting appropriate laser process parameters can not only refine grain size but also reduce the volume fraction of pores and thus reduce the J-integral and eventually improve repair quality of repaired specimens. The study investigates the relationship of process parameter–microstructure–repair quality in the laser repair process and provides a method for studying the mechanical behavior of materials at macro and micro scales. Full article
(This article belongs to the Special Issue Additive Manufacturing of Metals and Alloys: Microstructure and Mechanical Properties)
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