Processing, Microstructure and Properties of Aluminium Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 727

Special Issue Editor


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Guest Editor
Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
Interests: aluminium; quasicrystal; solidification; heat treatment; heat resistance; metallography; continuous casting; indentation
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Special Issue Information

Dear Colleagues,

The prospects of the aluminium industry appear promising, as the applications of aluminium and its alloys have markedly diversified across sectors, encompassing the automotive, aerospace, packaging, and construction industries. Consequently, the annual output of aluminium alloys has a consistent upward trend. The fundamental characteristic of aluminium lies in its low density, which underpins the elevated specific strength and modulus of its alloys. The application of aluminium alloys can further facilitate a reduction in energy consumption and carbon emissions, particularly through the enhancement of aluminium production via renewable energy sources and improvements in recycling processes.

The principal prerequisite for the future prosperity of aluminium and its alloys is the ongoing enhancement of existing aluminium alloys alongside the innovation of novel ones. In addition to traditional fabrication techniques (such as casting, forming, and powder metallurgy), additive manufacturing technologies offer supplementary possibilities for the tailoring of the microstructures of the alloys and their novel property combinations.

In this Special Issue, we extend an invitation for original research articles and reviews. The focal research domains should encompass the interrelations between the manufacturing technologies, microstructures, and properties of aluminium alloys. Manuscripts addressing the implications of microstructures and properties on carbon imprint are particularly sought after. The contributions presented in this Special Issue should provide a comprehensive overview of the current scientific and technological advancements (refer to the Keywords/Topics listed below). Your input will be valuable and highly esteemed. We anticipate the submission of your contributions.

Prof. Dr. Franc Zupanič
Guest Editor

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. 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 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

  • aluminium
  • processing
  • heat treatment
  • carbon footprint
  • microstructure
  • properties

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Related Special Issue

Published Papers (2 papers)

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Research

22 pages, 9679 KiB  
Article
Impact of Multiple-Laser Processing on the Low-Cycle Fatigue Behaviour of Laser-Powder Bed Fused AlSi10Mg Alloy
by Arun Prasanth Nagalingam, Erkan Bugra Tureyen, Abdul Haque, Adrian Sharman, Ozgur Poyraz, Evren Yasa and James Hughes
Metals 2025, 15(7), 807; https://doi.org/10.3390/met15070807 - 18 Jul 2025
Viewed by 289
Abstract
Multi-laser processing is increasingly adopted in laser powder bed fusion (L-PBF) to improve productivity and enable the fabrication of larger components, but its impact on part quality and performance remains a critical concern. This study investigates the microstructure, tensile properties, and fatigue performance [...] Read more.
Multi-laser processing is increasingly adopted in laser powder bed fusion (L-PBF) to improve productivity and enable the fabrication of larger components, but its impact on part quality and performance remains a critical concern. This study investigates the microstructure, tensile properties, and fatigue performance of components fabricated by L-PBF using single- and multiple-laser configurations. Both strategies were evaluated under varying layer thicknesses and gas flow conditions with optimized process parameters. Microstructural analysis revealed defects such as lack-of-fusion, porosity and microcracks in multiple-laser builds with reduced gas flow. However, the density and microhardness results showed negligible differences between single and multiple-laser builds. Tensile testing indicated that single-laser builds exhibited superior strength and ductility, whereas multiple-laser builds demonstrated reduced performance due to localized defects such as lack-of-fusion and microcracks. Low-cycle fatigue testing results showed that optimized multiple-laser strategies could achieve performance comparable to that of single-laser builds while improving productivity. The results also revealed that the gas flow becomes more pronounced with multiple-laser processing, where more spatter is generated due to the interactions of the lasers in a small scan area, and that reduced gas flow leads to fatigue degradation due to increased defect density. The results from this study clearly highlight the importance of gas flow, laser overlap, border optimization, and defect mitigation strategies in producing multiple-laser produced components with mechanical properties and fatigue performance comparable to those of single-laser produced L-PBF components. Full article
(This article belongs to the Special Issue Processing, Microstructure and Properties of Aluminium Alloys)
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15 pages, 2065 KiB  
Article
Effects of Fin Height, Base Thickness, Blackening, Emissivity and Thermal Conductivity on Heat Dissipation of Die-Cast Aluminum Alloy Heat Sink
by Hiroshi Fuse, Shusuke Oe and Toshio Haga
Metals 2025, 15(7), 696; https://doi.org/10.3390/met15070696 - 23 Jun 2025
Viewed by 313
Abstract
The effects of fin height, base thickness, blackening, emissivity and thermal conductivity on the heat dissipation for die-cast aluminum alloy heat sinks were investigated comprehensively. The thermal conductivity and emissivity vary depending on the aluminum alloy. It was clarified whether correlations between the [...] Read more.
The effects of fin height, base thickness, blackening, emissivity and thermal conductivity on the heat dissipation for die-cast aluminum alloy heat sinks were investigated comprehensively. The thermal conductivity and emissivity vary depending on the aluminum alloy. It was clarified whether correlations between the influences of these factors exist. Three aluminum alloys with different thermal conductivities and emissivities were used in this study. Four-finned heat sinks were produced by die casting. Four fin heights and three base thicknesses were tested. In the as-cast (non-blackened) heat sinks, the emissivity had a greater effect on the heat dissipation than the thermal conductivity did. In blackened heat sinks, the heat dissipation increased as the thermal conductivity increased. For both the as-cast and blackened heat sinks, the heat dissipation increased as both the fin height and base thickness increased. Correlations between these influencing factors were also investigated. The blackened heat sink made from aluminum alloy with larger thermal conductivity showed the best heat dissipation performance. Full article
(This article belongs to the Special Issue Processing, Microstructure and Properties of Aluminium Alloys)
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