Mechanical Properties and Friction Behavior of Metal Alloys and Their Composites

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

Deadline for manuscript submissions: 15 July 2025 | Viewed by 314

Special Issue Editor


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Guest Editor
School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
Interests: titanium alloy; aluminum alloy; metal matrix composite; mechanical properties; wear; powder metallurgy

Special Issue Information

Dear Colleagues,

The mechanical properties and friction behavior of metal alloys and their composites are of crucial significance in modern engineering. These characteristics determine their performance and applicability across diverse industrial sectors.

Mechanical properties, such as strength, ductility, and modulus, are vital indicators of the functionality and service life of these materials. Through alloying and composite design, specific mechanical responses can be achieved. For example, alloying elements can enhance strength via solid-solution or precipitation strengthening, while composite reinforcements improve stiffness and strength by load transfer.

Friction behavior, including wear resistance and frictional coefficients, is equally important. Understanding the underlying mechanisms and the influence of factors such as surface topography, lubrication, and operating conditions is essential in optimizing performance.

This Special Issue, "Mechanical Properties and Friction Behavior of Metal Alloys and Their Composites", will gather the latest research in this field. We welcome original research articles, reviews, and technical notes. Topics of interest include the following:

  • Alloy and composite design strategies to achieve the desired mechanical properties;
  • Microstructural analysis and its correlation with mechanical and friction behavior;
  • Characterization methods for microstructure–mechanical-property–friction relationships;
  • Friction and wear models and experimental verification;
  • Surface treatment techniques for enhanced friction and wear performance;
  • Mechanical and friction behavior under extreme conditions;
  • Industrial applications and the role of mechanical and friction properties.

I welcome your valuable contributions as we come together to further advance this field.

Dr. Jingwen Qiu
Guest Editor

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Keywords

  • mechanical properties
  • friction and wear
  • lubrication
  • steel
  • aluminum alloy
  • titanium alloy
  • magnesium alloy
  • high-entropy alloy
  • composites
  • EBSD
  • TEM
  • APT

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Published Papers (1 paper)

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Research

12 pages, 27680 KiB  
Article
Effect of Ultrasonic Vibration and Average Grain Size on the Deformability of T2 Copper in T-Shaped Micro-Upsetting
by Liangsong Jia, Yang Liu, Rengui Bi and Jian Li
Crystals 2025, 15(4), 307; https://doi.org/10.3390/cryst15040307 - 26 Mar 2025
Viewed by 166
Abstract
Ultrasonic vibration (UV)-assisted forming technology has emerged as a significant advancement in the field of bulk micro-forming. This study presents a comprehensive experimental investigation into the micro-scale deformation behavior of metallic materials and its influence on size effects under UV, with a specific [...] Read more.
Ultrasonic vibration (UV)-assisted forming technology has emerged as a significant advancement in the field of bulk micro-forming. This study presents a comprehensive experimental investigation into the micro-scale deformation behavior of metallic materials and its influence on size effects under UV, with a specific focus on the UV-assisted T-shaped micro-upsetting of T2 copper. Utilizing a custom-designed UV-assisted micro-upsetting apparatus, the flow stress, filling height, and microstructural evolution of T2 copper are systematically examined, considering various grain sizes, die opening angles, and ultrasonic amplitudes. The findings demonstrate that UV significantly mitigates the influence of grain size effects. Notably, the softening effect induced by UV becomes more pronounced with decreasing grain size, concomitantly leading to increased filling height. As the die opening angle expands, the required forming load increases. The enhancement of ultrasonic amplitude not only increases the V-groove filling height but also improves the surface quality. The optimal V-groove filling performance is achieved at an ultrasonic amplitude of 8.01 μm. It is crucial to note that increased ultrasonic amplitude generally improves forming performance, while excessive ultrasonic amplitude may lead to micro-crack formation within the material, thereby decreasing the formability of T2 copper. These results provide valuable insights into the complex interplay between ultrasonic parameters and material response in micro-forming processes, offering significant implications for the optimization of UV-assisted forming technologies in precision manufacturing applications. Full article
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