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Metals
Special Issues
Development, Characterization and Properties of High-Performance Aluminum Alloys
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Development, Characterization and Properties of High-Performance Aluminum Alloys

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 31 August 2025 | Viewed by 2321

Special Issue Editor

Dr. Jaehwang Kim

E-Mail Website
Guest Editor
Carbon Materials R&D Group, Korea Institute of Industrial Technology, Jeonju 54853, Republic of Korea
Interests: Al-Mg-Si alloys; age-hardening; precipitates; nanocluster; three-dimensional atom probe
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Aluminum alloys have been widely used in the aerospace and automobile industries because of their excellent specific strength. Several methods for the characterization of aluminum alloys have been introduced with the increase in aluminum applications, alongside advancements in analysis methods using the latest research equipment. Promoting the understanding of the fundamental aspects of the relationships between processing, properties, and microstructures is important, and the advanced characterization of these alloys would provide confirmative theories such as solidification, phase transition, deformation, fracture, corrosion, and age-hardening behaviors.

This Special Issue embraces fundamental physics as well as an industrial viewpoint for applications in aluminum alloys. Manuscripts relating progressive results are highly welcomed from both academic and commercial viewpoints.

Dr. Jaehwang Kim
Guest Editor

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. 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

  • aluminum alloys
  • characterization
  • microstructure
  • transmission electron microscope
  • three-dimensional atom probe
  • solidification
  • age-hardening
  • deformation
  • corrosion
  • fracture
  • joining
  • application

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

17 pages, 5934 KiB  
Article
In Situ Observation by X-Ray Radioscopy of Liquid Decomposition During Directional Solidification of Al-Cu-Sn Alloys
by Sarah De Albuquerque, Guillaume Reinhart, Hadjer Soltani, Danielle Cristina Camilo Magalhães, José Eduardo Spinelli and Henri Nguyen-Thi
Metals 2025, 15(3), 296; https://doi.org/10.3390/met15030296 - 7 Mar 2025
Viewed by 697
Abstract
Immiscible Al–Sn–Cu alloys may offer attractive properties, attaining superior tribological and mechanical properties when Sn-rich soft particles are homogeneously distributed in the reinforced Al–Cu matrix. In this paper, the solidifications of both Al-10 wt.% Cu-10 wt.% Sn and Al-10 wt.% Cu-20 wt.% Sn [...] Read more.
Immiscible Al–Sn–Cu alloys may offer attractive properties, attaining superior tribological and mechanical properties when Sn-rich soft particles are homogeneously distributed in the reinforced Al–Cu matrix. In this paper, the solidifications of both Al-10 wt.% Cu-10 wt.% Sn and Al-10 wt.% Cu-20 wt.% Sn alloys were investigated to analyze the successive stages that occur during the controlled cooling of these alloys, from the initial formation of the α-Al dendritic array to the final eutectic reaction. In particular, we focus on the liquid-phase demixing occurring during the solidification path, which leads to the formation of Sn droplets in the melt through a nucleation-growth process. Horizontal directional solidifications were performed on thin samples in a Bridgman-type furnace, with in situ and real-time observations using X-ray radioscopy. Two different behaviors have been found concerning liquid separation: for the low-Sn-content alloy, liquid demixing occurs in one single step, whereas for the high-Sn-content alloy, it is a two-step process, with first the nucleation of a few small Sn droplets followed by a sudden formation of a large amount of wide Sn droplets. The possible causes of these different behaviors are discussed in relation to the literature, namely, either a switch from immiscible to miscible liquids or a transition from the binodal region to the spinodal region. Full article
(This article belongs to the Special Issue Development, Characterization and Properties of High-Performance Aluminum Alloys)
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15 pages, 8735 KiB  
Article
Enhanced Strengthening and Toughening of T6-Treated 7046 Aluminum Alloy through Severe Plastic Deformation
by Yuna Wu, Hongchen Dong, Hao Huang, Ting Yuan, Jing Bai, Jinghua Jiang, Feng Fang and Aibin Ma
Metals 2024, 14(10), 1093; https://doi.org/10.3390/met14101093 - 24 Sep 2024
Viewed by 1233
Abstract
The 7046 aluminum alloy possesses a favorable fatigue property, corrosion resistance and weldability, but its moderate strength and plasticity limit its wider application and development. In the present study, severe plastic deformation (SPD) was applied prior to T6 treatment to significantly enhance the [...] Read more.
The 7046 aluminum alloy possesses a favorable fatigue property, corrosion resistance and weldability, but its moderate strength and plasticity limit its wider application and development. In the present study, severe plastic deformation (SPD) was applied prior to T6 treatment to significantly enhance the strength and toughness of the 7046 aluminum alloy. The results show that the alloy processed by four passes of equal channel angular pressing (ECAP) at 300 °C prior to T6 treatment exhibits an excellent mechanical performance, achieving an ultimate tensile strength (UTS) and elongation (EL) of 485 MPa and 19%, respectively, which are 18.6% and 375% higher than that of the T6 alloy. The mechanical properties of the alloy are further improved by an additional room temperature (RT) rolling process, resulting in a UTS of 508 MPa and EL of 23.4%, respectively. The increased presence of η′ and Al6Mn phases in the 300°C4P-R80%-T6 and 300°C4P-T6 alloys contributes to a strengthening and toughening enhancement in the SPD-processed T6 alloy. The findings from this work may shed new insights into enhancing the 7046 aluminum alloy. Full article
(This article belongs to the Special Issue Development, Characterization and Properties of High-Performance Aluminum Alloys)
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