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Metals
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Preparation, Formation and Application of Light Alloys and Their Composites
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Preparation, Formation and Application of Light Alloys and Their Composites

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: 30 September 2025 | Viewed by 1197

Special Issue Editor

Dr. Lei Luo

E-Mail Website
Guest Editor
School of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: special casting; light alloy materials; additive manufacturing; intelligent manufacturing

Special Issue Information

Dear Colleagues,

Light alloy materials, such as aluminum alloy, magnesium alloy, titanium alloy and their composite materials, are a new type of metal-based materials. A new generation of forces is promoting the development of human society with lightning speed, making light alloy materials a leader among thousands of materials. Especially under the trend of light-weighting, light alloy materials have become a crucial choice for various industries in the pursuit of high efficiency, energy saving, and environmental protection due to their light weight and high strength. Naturally, it has become an indispensable and important material in aerospace, electronic communications, architectural decoration, mechanical, electrical, petrochemical, and many other fields. The preparation method of light alloy-based materials also varies according to different needs, mainly casting technology, but also involves additive manufacturing, powder metallurgy, hot pressing, and other metal solidification-related means. With the emergence of new preparation and processing technologies, light alloy materials bring more obvious advantages and new requirements. For the above-mentioned reasons, advances in light alloys and their composites, including the preparation, formation, and application of the materials in all processing steps and final property analysis, are the scope for this Special Issue.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: light alloy material preparation methods and the induced influence on the final products performance (intrinsic material properties and/or material–structure synergistic properties). We look forward to receiving insightful contributions.

Dr. Lei Luo
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

  • light alloy
  • light alloy matrix composites
  • material preparation technology
  • material forming technology
  • material application
  • casting
  • additive manufacturing
  • powder metallurgy
  • hot pressing

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

Published Papers (3 papers)

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Research

16 pages, 4641 KiB  
Article
Optimizing the High-Temperature Oxidation Resistance of Nb-Si-Based Alloys by Adding Different Ti/Mo/Hf Elements
by Youwei Zhang, Zhongde Shan, Lei Luo, Zhaobo Li, Xiao Liang, Yanqing Su, Tao Yang, Yong Zang and Dehua Jin
Metals 2025, 15(4), 439; https://doi.org/10.3390/met15040439 - 14 Apr 2025
Viewed by 166
Abstract
As a candidate material for turbine blades in aerospace engines, Nb-Si-based alloys have attracted significant research attention due to their high melting point and low density. However, their poor high-temperature oxidation resistance limits practical applications. Different alloying elements, including Ti, Mo, and Hf, [...] Read more.
As a candidate material for turbine blades in aerospace engines, Nb-Si-based alloys have attracted significant research attention due to their high melting point and low density. However, their poor high-temperature oxidation resistance limits practical applications. Different alloying elements, including Ti, Mo, and Hf, were added to Nb-Si-based alloys to study the microstructural evolution of alloys. Additionally, the oxidation behavior and the oxidation kinetics of different alloys, as well as the morphology and microstructure of oxide scale and interior alloys at 1523 K from 1 h to 20 h were analyzed systematically. The current findings indicated that the Mo element is more conducive to promoting the formation of high-temperature precipitates of β-Nb5Si3 than the Ti and Hf elements. Inversely, the Ti element tends to cause the transition from high-temperature-phase β-Nb5Si3 to low-temperature-phase α-Nb5Si3, while the Hf element improves the appearance of the γ-Nb5Si3 phase but inhibits the other phases and refines the primary Nbss effectively. Noteworthily, compared with the oxidation weight gain of different alloys, Nb-16Si-20Ti-5Mo-3Hf-2Al-2Cr alloy has excellent high-temperature oxidation resistance, in which the oxidation products are TiNb2O7, Nb2O5, SiO2, TiO2, and HfO2. It can be determined that in the oxidation process, the Ti element will preferentially form an oxide film of TiO2, thereby wrapping around the matrix phases, protecting the matrix, and improving the antioxidant capacity, while the Hf element can form an infinite solid solution with the matrix and consume the small number of oxygen atoms entering the matrix, so as to achieve the effect of improving the oxidation resistance. Full article
(This article belongs to the Special Issue Preparation, Formation and Application of Light Alloys and Their Composites)
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21 pages, 25010 KiB  
Article
Casting Process and Quality Control Analysis of Zr705C Zirconium Alloy
by Youwei Zhang, Zhongde Shan, Yong Zang, Dehua Jin, Chunling Bao, Xiao Liang and Qian Yao
Metals 2025, 15(4), 417; https://doi.org/10.3390/met15040417 - 7 Apr 2025
Viewed by 220
Abstract
Basic research on and the industrial development of zirconium alloys in China started relatively late, with insufficient domestic production capacity for zirconium alloy castings; especially for large-sized zirconium alloy castings, there is little production experience and significant challenges in quality control. Therefore, the [...] Read more.
Basic research on and the industrial development of zirconium alloys in China started relatively late, with insufficient domestic production capacity for zirconium alloy castings; especially for large-sized zirconium alloy castings, there is little production experience and significant challenges in quality control. Therefore, the production and research and development of zirconium alloy castings have received widespread attention from academia and industrial production sectors. This article analyzes the production status of domestic zirconium alloy castings, examines the casting process characteristics of valve body castings, and optimizes the casting process based on ProCAST simulation analysis results, using a lost foam precision casting process to cast a large-sized, high-pressure zirconium alloy casting for chemical use. The phase composition and microstructure were tested and analyzed, and the results showed the following: there is a certain thickness of the diffusion contamination layer on the surface of the castings. Finally, key points regarding zirconium alloy casting surface quality control and welding quality control were proposed, effectively improving the quality of the castings. Full article
(This article belongs to the Special Issue Preparation, Formation and Application of Light Alloys and Their Composites)
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13 pages, 6795 KiB  
Article
Warm and Hot Deformation Behavior of AA6060 Aluminum Alloy
by Cinzia Menapace and Giovanni Straffelini
Metals 2025, 15(3), 224; https://doi.org/10.3390/met15030224 - 20 Feb 2025
Viewed by 475
Abstract
The warm and hot deformation behavior of a 6060 aluminum alloy was investigated through compression tests conducted at temperatures ranging from 100 °C to 400 °C (homologous temperature range of 0.41–0.75) and strain rates of 0.001 and 0.1 s−1. The flow [...] Read more.
The warm and hot deformation behavior of a 6060 aluminum alloy was investigated through compression tests conducted at temperatures ranging from 100 °C to 400 °C (homologous temperature range of 0.41–0.75) and strain rates of 0.001 and 0.1 s−1. The flow stresses were correlated with strain rate and temperature using a hyperbolic sine equation, and the activation energy was calculated for both deformation regimes. The modeling parameters were linked to the active plastic deformation mechanisms: strain hardening in the warm regime and dynamic recrystallization in the hot regime. A strong correlation between the experimental and calculated data was observed when the equation was applied separately to the stresses measured in the warm and hot temperature ranges. Full article
(This article belongs to the Special Issue Preparation, Formation and Application of Light Alloys and Their Composites)
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