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Advances in Materials, Design and Modeling of Additive Manufacturing

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (20 January 2023) | Viewed by 7084

Special Issue Editor


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Guest Editor
Graduate School of Physics and Materials Technology, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
Interests: additive manufacturing, selective laser melting; functionally graded materials; metal powder; lightweight structures; modeling

Special Issue Information

Dear Colleagues,

Additive manufacturing has already become widespread not only in the academic environment but also in various fields of industry. An important advantage of additive manufacturing is the ability to form functionally graded materials. Products made from such materials can exhibit different properties in certain elements. Variations in properties can be achieved through the formation of a gradient structure or the density or chemical composition of the material. The ability to design and manufacture functionally graded complex shape parts opens up tremendous opportunities in the design of new products and mechanisms.

Modeling the additive manufacturing process makes a more complete understanding of the ongoing processes possible. A large number of different processes simultaneously occurring in additive manufacturing require special approaches to their modeling. Ultimately, however, this allows improving the quality of the resulting products and reducing the number of experiments in the development of the technological process.

Optimization of the design of lightweight bionic and lattice structures solves several problems at once, including reducing the weight of products, and the formation of a complex developed surface, which is especially important in biomedical applications to improve biointegration and implantation. In addition, mesh structures can be used to obtain the required mechanical characteristics such as damping capacity, elastic modulus and others.

This Special Issue will publish new reviews and research findings on the topics covered, including, but not limited to, the following:

  • Laser additive manufacturing;
  • Lightweight structures;
  • Biomaterials and new medical materials, and 3D printing of biomaterials;
  • Postprocessing of materials and heat treatment;
  • Modeling and design of additive manufacturing;
  • New materials and materials with special properties;
  • Functionally graded materials;
  • 4D and smart materials.

Dr. Evgenii Borisov
Guest Editor

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Keywords

  • additive manufacturing
  • selective laser melting
  • functionally graded materials
  • lattice structures
  • metal powder
  • lightweight structures
  • modeling

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Published Papers (3 papers)

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Research

9 pages, 9526 KiB  
Article
Interface Characterization of Bimetallic Ti-6Al-4V/Ti2AlNb Structures Prepared by Selective Laser Melting
by Igor Polozov, Anna Gracheva and Anatoly Popovich
Materials 2022, 15(23), 8528; https://doi.org/10.3390/ma15238528 - 30 Nov 2022
Cited by 7 | Viewed by 1854
Abstract
Additive Manufacturing (AM) of multimaterial components is a promising way of fabricating parts with improved functional properties. It allows for the combination of materials with different properties into a single component. The Ti2AlNb-based intermetallic alloy provides high temperature strength, while the [...] Read more.
Additive Manufacturing (AM) of multimaterial components is a promising way of fabricating parts with improved functional properties. It allows for the combination of materials with different properties into a single component. The Ti2AlNb-based intermetallic alloy provides high temperature strength, while the Ti-6Al-4V (Ti64) alloy has good fracture toughness, ductility, and a relatively low cost. A combination of these alloys into a single component can be used to produce advanced multimaterial parts. In this work, Ti2AlNb/Ti-6Al-4V bimetallic structures were fabricated from pre-alloyed powders using the Selective Laser Melting (SLM) process. The effects of high-temperature substrate preheating, post-processing by annealing, and hot isostatic pressing on defect formation, the microstructural evolution of the interface area, and the mechanical properties of the bimetallic samples were investigated. High-temperature substrate preheating during the SLM process was necessary to prevent reheat cracking of the Ti2AlNb part, while annealing and hot isostatic pressing post-processing improved the chemical and microstructural homogeneity of the transition zone and enhanced the tensile properties of the bimetallic structure. Full article
(This article belongs to the Special Issue Advances in Materials, Design and Modeling of Additive Manufacturing)
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9 pages, 2988 KiB  
Article
Modification of Inconel 718 Properties by In Situ Y Addition in Selective Laser Melting
by Evgenii Borisov, Anatoly Popovich and Vadim Sufiiarov
Materials 2022, 15(18), 6219; https://doi.org/10.3390/ma15186219 - 7 Sep 2022
Cited by 2 | Viewed by 1545
Abstract
The paper presents the results of a study of the possibility of Inconel 718 alloy properties modifying by adding Yttrium in situ in the process of selective laser melting. The single and double laser processing of each layer was used. Yttrium was introduced [...] Read more.
The paper presents the results of a study of the possibility of Inconel 718 alloy properties modifying by adding Yttrium in situ in the process of selective laser melting. The single and double laser processing of each layer was used. Yttrium was introduced into the alloy in an amount of 0.1, 0.2, 0.5, 1, and 2 mass %. Studies of the structure of the material showed that undissolved Yttrium particles remain in the material. With an increase in the proportion of yttrium in the alloy, the hardness increases. Tensile test showed that with an increase in the content of yttrium from 0 to 0.1%, the yield strength and tensile strength decrease, but the relative elongation increases. With a further increase in the yttrium content, there is a sharp decrease in the relative elongation and an increase in the yield strength, which is caused by the existence of a large number of undissolved yttrium particles in the sample. Full article
(This article belongs to the Special Issue Advances in Materials, Design and Modeling of Additive Manufacturing)
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15 pages, 4733 KiB  
Article
Surface Modification of Additively Manufactured Nitinol by Wet Chemical Etching
by Denis Nazarov, Aida Rudakova, Evgenii Borisov and Anatoliy Popovich
Materials 2021, 14(24), 7683; https://doi.org/10.3390/ma14247683 - 13 Dec 2021
Cited by 6 | Viewed by 2883
Abstract
Three-dimensional printed nitinol (NiTi) alloys have broad prospects for application in medicine due to their unique mechanical properties (shape memory effect and superplasticity) and the possibilities of additive technologies. However, in addition to mechanical properties, specific physicochemical characteristics of the surface are necessary [...] Read more.
Three-dimensional printed nitinol (NiTi) alloys have broad prospects for application in medicine due to their unique mechanical properties (shape memory effect and superplasticity) and the possibilities of additive technologies. However, in addition to mechanical properties, specific physicochemical characteristics of the surface are necessary for successful medical applications. In this work, a comparative study of additively manufactured (AM) NiTi samples etched in H2SO4/H2O2, HCl/H2SO4, and NH4OH/H2O2 mixtures was performed. The morphology, topography, wettability, free surface energy, and chemical composition of the surface were studied in detail. It was found that etching in H2SO4/H2O2 practically does not change the surface morphology, while HCl/H2SO4 treatment leads to the formation of a developed morphology and topography. In addition, exposure of nitinol to H2SO4/H2O2 and HCl/H2SO4 contaminated its surface with sulfur and made the surface wettability unstable in air. Etching in NH4OH/H2O2 results in surface cracking and formation of flat plates (10–20 microns) due to the dissolution of titanium, but clearly increases the hydrophilicity of the surface (values of water contact angles are 32–58°). The etch duration (30 min or 120 min) significantly affects the morphology, topography, wettability and free surface energy for the HCl/H2SO4 and NH4OH/H2O2 etched samples, but has almost no effect on surface composition. Full article
(This article belongs to the Special Issue Advances in Materials, Design and Modeling of Additive Manufacturing)
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