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Additive Manufacturing of Aluminum Alloys and Aluminum Matrix Composites (Second Edition)

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

Deadline for manuscript submissions: 20 September 2024 | Viewed by 1369

Special Issue Editor


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Guest Editor
School of Materials Science and Engineering, Shanghai JiaoTong University, Shanghai 200240, China
Interests: additive manufacturing; biomimetic 3D printed structures
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Special Issue Information

Dear Colleagues,

With significant advantages in specific strength and stiffness, aluminum alloys and aluminum matrix composites have been widely used in transportation, aerospace, and other applications. Additive manufacturing (AM) has great potential for the rapid customization and repairment of parts. At present, various additive manufacturing methods have been developed that could be generally categorized into fusion, solid-state, and binder jetting AM. The heat source in fusion AM includes laser, electron beam, and electric arc. The style of providing the supplementary material in fusion AM includes powder bed, deposited powder, and deposited wire. Solid-state AM generally includes cold spray, ultrasonic AM, and friction AM. Because of the diversity of the manufacturing methods and the unique properties of materials, it is important to perform comprehensive and comparative studies on the AM of aluminum alloys and aluminum matrix composites, which could provide a guide for selecting the most suitable AM method for industrial application. For this Special Issue, we invite our colleagues to submit papers in the areas of additive manufacturing of aluminum alloys and aluminum matrix composites. The topics of interest include but are not limited to fusion and solid-state additive manufacturing processes, advanced characterization, modeling and simulation, optimization of the manufacturing process, topological optimization, in situ observation, monitoring control, post-treatment, and hybrid manufacturing. Review papers and short communications are also of interest for this Special Issue. 

Dr. Hongze Wang
Guest Editor

Manuscript Submission Information

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Keywords

  • additive manufacturing
  • aluminum alloy
  • aluminum composite
  • selective melting
  • powder deposition
  • wire deposition
  • cold spray
  • post-treatment
  • hybrid manufacturing
  • advanced characterization

Published Papers (2 papers)

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Research

16 pages, 13663 KiB  
Article
Microstructure and Mechanical Properties of a Novel Al-Mg-Sc-Ti Alloy Fabricated by Laser Powder Bed Fusion
by Zhiheng Shu and Yunzhong Liu
Materials 2024, 17(3), 686; https://doi.org/10.3390/ma17030686 - 31 Jan 2024
Viewed by 459
Abstract
(TiH2 + ScH3)/Al-Mg composite powders with different Ti contents were produced by ball milling. These composite powders were fabricated to cube and cuboid shape samples via a laser powder bed fusion process with optimal processing parameters. The TiH2 and [...] Read more.
(TiH2 + ScH3)/Al-Mg composite powders with different Ti contents were produced by ball milling. These composite powders were fabricated to cube and cuboid shape samples via a laser powder bed fusion process with optimal processing parameters. The TiH2 and ScH3 particles underwent dehydrogenation during the laser powder bed fusion process, and these composite powders ultimately formed Al-Mg-Sc-Ti alloys. The relative density, printability, microstructure, hardness and tensile properties of these alloy samples were investigated. The results show that these Al-Mg-Sc-Ti alloys have lower hot-crack sensitivity, having fine equiaxed grains. An Al18Mg3(Ti,Sc)2 intermetallic phase and in situ L12-Al3(Sc,Ti) precipitations formed during the laser powder bed fusion process, which is beneficial for nucleation and dispersion strengthening. The ultimate tensile strength of the Al-Mg-0.7Sc-1.0Ti alloy was 313.6 MPa with an elongation of 6.6%. During the hot isostatic pressing treatment, most of the Mg element precipitated from the matrix and changed the Al3(Sc,Ti) into a Al18Mg3(Ti,Sc)2 precipitate completely. The Al-Mg-Sc-Ti alloys were nearly fully dense after the hot isostatic pressing treatment and exhibited better mechanical properties. The ultimate tensile strength of the Al-Mg-0.7Sc-1.0Ti was 475 MPa with an elongation of 8.5%. Full article
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23 pages, 8584 KiB  
Article
Experimental and Statistical Analysis of the Effect of Heat Treatment on Surface Roughness and Mechanical Properties of Thin-Walled Samples Obtained by Selective Laser Melting from the Material AlSi10Mg
by Sergey N. Grigoriev, Nikita Nikitin, Oleg Yanushevich, Natella Kriheli, Olga Kramar, Roman Khmyrov, Idarmach Idarmachev and Pavel Peretyagin
Materials 2023, 16(23), 7326; https://doi.org/10.3390/ma16237326 - 24 Nov 2023
Viewed by 698
Abstract
Statistical analysis of mechanical properties of thin-walled samples (~500 microns) obtained by selective laser melting from AlSi10Mg material and subjected to heat treatment for 1 h at temperatures from 260 °C to 440 °C (step of aging temperature change 30 °C) has shown [...] Read more.
Statistical analysis of mechanical properties of thin-walled samples (~500 microns) obtained by selective laser melting from AlSi10Mg material and subjected to heat treatment for 1 h at temperatures from 260 °C to 440 °C (step of aging temperature change 30 °C) has shown that the maximum strain hardening in the stretching diagram section from yield strength to tensile strength is achieved at the heat treatment temperature equal to 290 °C. At carrying out of correlation analysis, a statistically significant positive correlation between deformation corresponding to yield strength and the sum of heights of the largest protrusions and depths of the largest depressions of the surface roughness profile within the basic length of the sample (Rz) and the full height of the surface roughness profile (Rmax) was established. It was found that the reason for the correlation is the presence of cohesive states between the extreme values of the surface roughness profile that persist along the entire length of the specimen. Full article
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