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Crystals
Special Issues
Development of Light Alloys and Their Applications
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Development of Light Alloys and Their Applications

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Metals and Alloys".

Deadline for manuscript submissions: 15 June 2025 | Viewed by 2096

Special Issue Editors

Dr. Hua Qian Ang

E-Mail Website
Guest Editor
School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
Interests: light alloys; slips; twinning; die-casting; deformation behaviour; mechanical properties
Dr. Gulshan Kumar

E-Mail Website
Guest Editor
Department of Mechanical Engineering, BITS Pilani Dubai Campus, Dubai 345055, United Arab Emirates
Interests: material characterization; mechanical behaviour of materials; light alloys; deformation behaviour; microstructure property relation
Dr. Erdem Karakulak

E-Mail Website
Guest Editor
Brunel Centre for Advanced Solidification Technology, Brunel University London, Uxbridge UB8 3PH, UK
Interests: solidification of metals; aluminium alloys; magnesium alloys; casting of metals; mechanical properties of metallic materials; microstructure
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnesium, aluminium, and titanium are often classified as light alloys because of their high strength-to-weight ratio and/or high stiffness-to-weight ratio. These light alloys have significant commercial importance. The most commonly used of the light alloys are aluminium alloys, not only in automotive and aerospace applications but also for cans and foils. Today, titanium alloys and magnesium alloys are becoming more widely used. Titanium alloys are mostly used in the aerospace industry due to their low density and high strengths, especially at high temperatures. Other applications of titanium alloys include marine and petrochemical applications due to their excellent corrosion resistance. Magnesium alloys, however, are used when further savings in weight are required, for example, in components for aircraft, material-handling equipment, and portable power tools. Although light alloys have been successfully applied in various fields, there are still some shortcomings to overcome. Research on light alloys is still in progress.

This Special Issue in Crystals is designed to publish high-quality research papers, review articles, and short communications regarding the recent advances in the development of aluminium/titanium/magnesium alloys as structural and functional materials and their potential commercial applications. This Special Issue also welcomes studies in the areas of basic research, theoretical calculation, the design of novel light alloys, and material preparation and characterization.

Dr. Hua Qian Ang
Dr. Gulshan Kumar
Dr. Erdem Karakulak
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. Crystals 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 2100 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

  • light alloys
  • aluminium alloys
  • magnesium alloys
  • titanium alloys
  • deformation behaviour
  • alloy and development
  • metallurgy
  • material characterization

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Published Papers (3 papers)

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Research

16 pages, 12735 KiB  
Article
Study of the Hibridation of Ablation Casting and Laser Wire Metal Deposition for Aluminum Alloy 5356
by Ana Isabel Fernández-Calvo, Mikel Madarieta, Ane Solana, Ibon Lizarralde, Mikel Rouco and Carlos Soriano
Crystals 2025, 15(2), 134; https://doi.org/10.3390/cryst15020134 - 25 Jan 2025
Viewed by 518
Abstract
The rapidly growing field of metal additive manufacturing (AM) has enabled the fabrication of near-net-shape components with complex 3D structures in a more reliable, productive, and sustainable way compared to any other manufacturing process. The productivity of AM could be significantly increased combining [...] Read more.
The rapidly growing field of metal additive manufacturing (AM) has enabled the fabrication of near-net-shape components with complex 3D structures in a more reliable, productive, and sustainable way compared to any other manufacturing process. The productivity of AM could be significantly increased combining conventional and AM technologies. However, the application at an industrial level requires the validation of the AM process itself and the assurance of the soundness of the junction between the substrate and the deposited metal at a sufficiently rapid metal deposition rate. In this work, the validation of additively manufactured samples of Al-5356 alloy was performed. These were manufactured partially via an ablation casting process and partially via laser metal deposition using a metallic wire (LMwD). The deposited material showed low porosity levels, i.e., below 0.04%, and a small number of lack-of-union defects, which are detrimental to the mechanical properties. In the tensile samples centred at the junction between the ablated and deposited materials, it was found that when the AM part of the sample exhibited no lack-of-union defects, the region manufactured using LMwD showed higher strength than the ablation-cast part. These results suggest that the combination of ablation casting and LMwD is a competitive technique for the manufacturing of Al-5356 alloy parts with complex geometries. Full article
(This article belongs to the Special Issue Development of Light Alloys and Their Applications)
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13 pages, 1857 KiB  
Article
The Effect of Gradient Cooling Behavior on the Microstructure and Mechanical Properties of Al-2at.% Nd Alloy in a Vacuum Environment
by Xiangjie Wang, Xinyu Zhang, Wenjie Wu and Shuchen Sun
Crystals 2025, 15(1), 81; https://doi.org/10.3390/cryst15010081 - 15 Jan 2025
Viewed by 404
Abstract
Al-2at.% Nd alloy with a gradient cooling rate was prepared using a wedge-shaped mold in a vacuum environment. The relationship between gradient cooling behavior and the microstructure and properties of the Al-2at.% Nd alloy was investigated. The stability of the Al11Nd [...] Read more.
Al-2at.% Nd alloy with a gradient cooling rate was prepared using a wedge-shaped mold in a vacuum environment. The relationship between gradient cooling behavior and the microstructure and properties of the Al-2at.% Nd alloy was investigated. The stability of the Al11Nd3 phase and the mechanical properties were confirmed through first-principles calculations. The results indicated that as the cooling rate decreased, the transformation of grain morphology in Al-2at.% Nd occurred as follows: a mixture of columnar grains and equiaxed grains→equiaxed grains. The grain size of the alloy increased. Discontinuous skeletal eutectic phases, α-Al and Al11Nd3, formed within the alloy, resulting in a reduction in the number of phase boundaries and grain boundaries. The hardness of the alloy decreased by 25.53%, and this pattern of change closely aligned with the calculated results. Full article
(This article belongs to the Special Issue Development of Light Alloys and Their Applications)
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18 pages, 15943 KiB  
Article
Evaluation of Structural Transition Joints Cu-Al-AlMg3 Used in Galvanizer Hangers
by Milan Marônek, Jozef Bárta, Katarína Bártová, Miroslav Sahul, Martin Sahul, Matej Pašák, Petr Nesvadba and Petr Bezdička
Crystals 2024, 14(11), 974; https://doi.org/10.3390/cryst14110974 - 12 Nov 2024
Viewed by 620
Abstract
The paper deals with the evaluation of the quality of Cu-Al-AlMg3 structural transition joints (STJ) made by explosion welding proposed for the renovation of galvanizer hangers. The three-layer joint consisted of electrolytic copper with a thickness of 25 mm, 2 mm of aluminium [...] Read more.
The paper deals with the evaluation of the quality of Cu-Al-AlMg3 structural transition joints (STJ) made by explosion welding proposed for the renovation of galvanizer hangers. The three-layer joint consisted of electrolytic copper with a thickness of 25 mm, 2 mm of aluminium represented by the AW1050 alloy, and 25 mm of the EN AW 575 aluminium alloy. Light microscopy analysis confirmed the wavy pattern of both interfaces of the welded joint and significant plastic deformation in close proximity to the waves. Microhardness measurement revealed a partial strain hardening of the AW5754 copper-aluminium alloy near the interface and a significant increase in microhardness in the vortex zone of waves, reaching a value of up to 863 HV 0.025. Microcracks were also observed in these places. The intermetallic phase Al2Cu was identified in the vortex zones by XRD analysis. As a continuous layer of intermetallic phase was not observed in the interface of the welded joint, it is possible to consider the used welding parameters as appropriate. A semi-quantitative EDX analysis revealed a diversity of chemical composition in the vortex zones, which does not correspond to the phase composition based on the equilibrium binary Al-Cu diagram due to non-equilibrium conditions in the formation of the welded joint interface. The bond strength of three-layer welded joint evaluated by the strength test ranged from 151 to 171 MPa, which represented approximately a two-fold increase in comparison to the ultimate tensile strength of alloy AW1050, while the failure occurred in all samples at the AW1050-AW5754 alloy interface. Full article
(This article belongs to the Special Issue Development of Light Alloys and Their Applications)
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