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Crystals
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Preparation and Properties of Aluminum Alloy Materials (2nd Edition)
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Preparation and Properties of Aluminum Alloy Materials (2nd Edition)

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

Deadline for manuscript submissions: closed (20 March 2025) | Viewed by 3006

Special Issue Editor

Dr. Xiangjie Wang

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Interests: research on the preparation technology for high-quality aluminum alloy materials; equipment and process development for the preparation of aluminum alloy materials; microstructure and performance control of aluminum alloy materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The combination of the low density, good corrosion resistance, strength, and formability of aluminum alloys makes them attractive to automotive and aircraft manufacturers. Research has shown that lightweight vehicles can improve vehicle power, reduce fuel consumption, and reduce exhaust emissions and air pollution while ensuring vehicle strength and safety performance. For every 10% reduction in vehicle weight, fuel consumption can be reduced by 6%–8%, and exhaust emissions can be reduced by 5%–6%. The main goal of modern aircraft manufacturing is to reduce manufacturing costs and operating expenses. Compared with steel materials for automobiles, aluminum alloys absorb 50% more energy than steel during a crash. Aluminum alloys are green and environmentally friendly materials that can be recycled. They are very important and one of the best materials for the lightweight design of automobiles.

In recent decades, global environmental protection has required the automotive industry to increase fuel efficiency and reduce carbon dioxide emissions. This has promoted research into the application of lightweight materials instead of traditional steel materials. These are currently hot and timely topics. Therefore, considering the safety of vehicles, it is necessary to carry out systematic research on the component design, forming process, and performance control of aluminum alloy materials in terms of replacing steel with aluminum alloys. The present Special Issue on the “Preparation and Properties of Aluminum Alloy Materials” will showcase status reports summarizing the progress achieved in the last five years.

It is our pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Xiangjie Wang
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. 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

  • aluminum alloy
  • lightweight
  • microstructure
  • properties
  • materials design of AI alloys and composites
  • manufacturing process

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Related Special Issue

Published Papers (3 papers)

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Research

16 pages, 6522 KiB  
Article
Synergistic Effects of Nd Content and Cooling Rate on the Organization and Properties of Al-Nd Alloys
by Wenjie Wu, Shuchen Sun, Xiangjie Wang, Xinyu Zhang, Chengcheng Chen, Xin Hong, Yaoyu Yan, Jing Wei and Ganfeng Tu
Crystals 2025, 15(1), 40; https://doi.org/10.3390/cryst15010040 - 30 Dec 2024
Viewed by 639
Abstract
This research focuses on the synergistic effect of the cooling rate and solute neodymium (Nd) content on the microstructure and physical properties of aluminum-neodymium (Al-Nd) alloys. The results indicate that the cooling rate has a significant impact on the grain morphology, size, and [...] Read more.
This research focuses on the synergistic effect of the cooling rate and solute neodymium (Nd) content on the microstructure and physical properties of aluminum-neodymium (Al-Nd) alloys. The results indicate that the cooling rate has a significant impact on the grain morphology, size, and morphology of eutectic Al₁₁Nd₃ in the alloy. As the cooling rate decreases, the grains transform from columnar crystals to equiaxed crystals, exhibiting different distribution characteristics in various regions, and the eutectic transforms from skeletal to lamellar and then to acicular. The Nd content affects the eutectic growth and solubility, reaching the maximum solubility at 11 wt.% Nd. Due to the longer diffusion time of Nd atoms in the slow-cooling region and the formation of compounds, the lattice constant in the slow-cooling region is larger. In terms of physical properties, the hardness and electrical conductivity of the alloy are inversely related. The hardness increases with an increases of the cooling rate and Nd content, which is attributed to grain refinement and solid solution strengthening, while the electrical conductivity decreases. These findings are of important theoretical and practical significance for optimizing the performance and application of Al-Nd alloys. Full article
(This article belongs to the Special Issue Preparation and Properties of Aluminum Alloy Materials (2nd Edition))
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20 pages, 17547 KiB  
Article
Assessment and Improvement of Melt Quality of Recycled Secondary A357 Alloy by Application of the High Shear Melt Conditioning (HSMC) Technology
by Zhichao Niu, Zhongping Que, Jayesh B. Patel and Zhongyun Fan
Crystals 2024, 14(12), 1044; https://doi.org/10.3390/cryst14121044 - 30 Nov 2024
Cited by 1 | Viewed by 1021
Abstract
In addition to impurities in recycled aluminum alloys, non-metallic inclusions are a significant factor that deteriorates the material’s castability and final mechanical properties. This, therefore, restricts the ability to transition from a primary to secondary aluminum alloy. In this study, the cleanliness of [...] Read more.
In addition to impurities in recycled aluminum alloys, non-metallic inclusions are a significant factor that deteriorates the material’s castability and final mechanical properties. This, therefore, restricts the ability to transition from a primary to secondary aluminum alloy. In this study, the cleanliness of the recycled A357 alloy was evaluated through non-metallic inclusions’ characterization, hydrogen content measurement, fluidity test, and casting defects identification. The non-metallic inclusions generated during the recycling process of A357 alloy were collected by the pressurized melt filtration technique. All of the inclusion types collected during filtration were examined and identified by analytical scanning electron microscopy (SEM). Extra additions of up to 2 wt.% swarf in these secondary A357 alloys were designed to simulate highly contaminated alloys. Different to the conventional melt cleaning technologies that mainly focus on complete removal of inclusions, this study developed a novel approach that combines the removal of easily removeable inclusions while preserving well-dispersed inclusions that do not adversely affect the mechanical properties. This study demonstrates that high shear melt conditioning (HSMC) technology can achieve well-dispersed small non-metallic inclusions, low hydrogen content, improved fluidity, and fewer casting defects. As a result, the melt quality of the recycled A357 alloys has achieved a quality comparable to that of primary A357 alloy. Full article
(This article belongs to the Special Issue Preparation and Properties of Aluminum Alloy Materials (2nd Edition))
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16 pages, 9947 KiB  
Article
Weld Pool Flow Characteristics in Double-Wire Arc Welding of Aluminum Alloys: Research by Numerical Simulations
by Bolun Dong, Yunhao Xia, Zhida Ni, Xiaoyu Cai and Sanbao Lin
Crystals 2024, 14(10), 881; https://doi.org/10.3390/cryst14100881 - 9 Oct 2024
Cited by 1 | Viewed by 1023
Abstract
Double-wire arc welding involves simultaneously feeding two wires into a molten pool, improving the efficiency and flexibility of traditional welding techniques. However, the interactions between the two wires and the molten pools are complex, which increases the difficulties in process and composition control. [...] Read more.
Double-wire arc welding involves simultaneously feeding two wires into a molten pool, improving the efficiency and flexibility of traditional welding techniques. However, the interactions between the two wires and the molten pools are complex, which increases the difficulties in process and composition control. This work focuses on the weld pool flow characteristics in double-wire TIG arc welding. A CFD model incorporating a liquid bridge transfer model was developed to simulate the fluid flow phenomenon. Results show that the bead-forming appearances and flow characteristics of double-wire arc welding show no significant differences from single-wire arc welding. Welding current and welding speed have significant effects on the weld bead dimensions, while only welding current has effects on the flow characteristics. Wire feed XOZ angles show no significant influences on weld bead forming appearances and molten pool flow characteristics. Wire feed XOY angles influence the symmetry of the weld bead and the fluid flow. In 5B71/7055 heterogeneous double-wire arc welding, achieving a uniform distribution of alloy elements is difficult due to the complex convection patterns within the molten pool. Full article
(This article belongs to the Special Issue Preparation and Properties of Aluminum Alloy Materials (2nd Edition))
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