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Crystals
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Mechanical Properties and Structure of Metal Materials
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Mechanical Properties and Structure of Metal Materials

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

Deadline for manuscript submissions: 10 February 2026 | Viewed by 1541

Special Issue Editors

Dr. Xiang Li

E-Mail Website
Guest Editor
School of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Interests: mechanical metamaterial; negative Poisson’s ratio; mechanical property; structural design
Dr. Wei Zhang

E-Mail Website
Guest Editor
College of Science, Wuhan University of Science and Technology, Wuhan 430065, China
Interests: impact; dynamics response; explosion protection; mechanical metamaterials; fiber-reinforced composite; sandwich structure; porous material; honeycomb; negative Poisson's ratio
Prof. Dr. Shouxun Ji

E-Mail Website
Guest Editor
Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University of London, Uxbridge UB8 3PH, UK
Interests: solidification of metallic alloys; aluminum alloys; magnesium alloys; phase transformation; microstructure and mechanical properties; dissimilar metals and alloys: microstructure and mechanical properties; laser welding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metal is an important material that is indispensable to modern industry and life because of its high strength, good electrical and thermal conductivity, and strong plasticity. The high density of metal materials limits their application. Structured metal-based metamaterials are composed of a special microstructure and a large number of pores, so they have high specific stiffness, specific strength, and functional designability. However, Structured metal-based metamaterials still encounter challenges, such as the mechanical properties of metals, structural inverse design, multifunctional design, and the pursuit of extreme performance.

This Special Issue, entitled “Mechanical Properties and Structure of Metal Materials”, focuses on topics related to the mechanical properties of Structured metal-based metamaterials and pure metals, the design and engineering of these materials, and their applications. Structured metal-based metamaterials include honeycomb, lattice or truss materials, a sandwich structure, as well as cellular materials based on metal. Papers focused on other topics related to the design and application of Structured metamaterials are welcome to be submitted to this Special Issue.

Dr. Xiang Li
Dr. Wei Zhang
Prof. Dr. Shouxun Ji
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 250 words) can be sent to the Editorial Office for assessment.

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

  • metal
  • metal-based metamaterials
  • architected metamaterials
  • microstructure
  • pores
  • honeycomb materials
  • lattice materials
  • truss materials
  • sandwich structure
  • cellular materials
  • mechanical property
  • structural design
  • application

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Published Papers (3 papers)

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Research

14 pages, 3153 KB  
Article
Outcome of Hall Current and Mechanical Load on a Fiber-Reinforced Thermoelastic Medium per the Hypothesis of One Thermal Relaxation Time
by Samia M. Said, Emad K. Jaradat, Hanan S. Gafel and Sayed M. Abo-Dahab
Crystals 2025, 15(11), 924; https://doi.org/10.3390/cryst15110924 - 27 Oct 2025
Viewed by 190
Abstract
The current study shows the propagation of waves in a fiber-reinforced thermoelastic medium with an inclined load under the effect of Hall current and gravitational force. The problem is analyzed using the Lord–Schulman hypothesis of one thermal relaxation time. A normal mode method [...] Read more.
The current study shows the propagation of waves in a fiber-reinforced thermoelastic medium with an inclined load under the effect of Hall current and gravitational force. The problem is analyzed using the Lord–Schulman hypothesis of one thermal relaxation time. A normal mode method is utilized to acquire the analytical result for any boundary condition. Several investigations have been adapted into figures to display the impacts of the gravity field, Hall current, inclined load, and the empirical solid constant on all physical quantities. A comparison is made with the obtained results to indicate the strong impact of the external parameters acting on the phenomenon of mechanical load on the fiber-reinforcement thermoelastic medium. Full article
(This article belongs to the Special Issue Mechanical Properties and Structure of Metal Materials)
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23 pages, 24609 KB  
Article
Effect of Initial Solid Solution Microstructure on the Hot Deformation Behavior of Mg-Er-Sm-Zn-Zr Alloy
by Guiyang Shao, Zhongyi Cai, Chaojie Che, Liren Cheng, Minqiang Shi, Tingzhuang Han, Xiaobo Liang and Hongjie Zhang
Crystals 2025, 15(10), 855; https://doi.org/10.3390/cryst15100855 - 30 Sep 2025
Viewed by 370
Abstract
The hot deformation behavior of a Mg-9.2Er-4.9Sm-2.2Zn-0.6Zr (wt.%) alloy, with emphasis on the role of grain size and long-period stacking-ordered (LPSO) phases, was examined via comparison experiments. Two types of samples were obtained through distinct heat treatment schedules: sample A had a smaller [...] Read more.
The hot deformation behavior of a Mg-9.2Er-4.9Sm-2.2Zn-0.6Zr (wt.%) alloy, with emphasis on the role of grain size and long-period stacking-ordered (LPSO) phases, was examined via comparison experiments. Two types of samples were obtained through distinct heat treatment schedules: sample A had a smaller grain size, featuring block-shaped LPSO phases at grain boundaries and lamellar LPSO phases within grains, while sample B had a larger grain size and few LPSO phases. The hot deformation behavior was characterized by the true stress–strain curve within the processing window of 300–450 °C and 0.001–1 s−1. The block-shaped LPSO phases contributed more significantly to strain hardening, leading to elevated flow stress in sample A, particularly under low-temperature and high-strain-rate conditions. Through the particle-stimulated nucleation (PSN) mechanism, block-shaped LPSO phases demonstrated greater efficiency in promoting Dynamic recrystallization (DRX) compared to lamellar LPSO phases; additionally, the synergistic effect between LPSO phases and grain boundary density further improved DRX efficiency. During hot deformation, dynamic precipitation of both block-shaped and lamellar LPSO phases occurred. The formation of block-shaped phases required a longer duration than that of lamellar ones. The presence of the LPSO kink exerted an influence on DRX, while a significant angle kink can promote DRX. Full article
(This article belongs to the Special Issue Mechanical Properties and Structure of Metal Materials)
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17 pages, 6165 KB  
Article
The Resistance of X-Shaped Re-Entrant Auxetic Sandwich Beams to Localized Impulsive Loading
by Wei Zhang, Tongtong Qi, Huiling Wang, Xiang Chen, Xiang Li and Junhua Shao
Crystals 2025, 15(9), 776; https://doi.org/10.3390/cryst15090776 - 30 Aug 2025
Cited by 1 | Viewed by 712
Abstract
This study introduces an improved X-shaped re-entrant auxetic structure designed to enhance mechanical performance by incorporating diamond-shaped elements into the re-entrant hexagonal configuration. Using a validated numerical model, the resistance of sandwich beams with the proposed core under localized impulsive loading is explored. [...] Read more.
This study introduces an improved X-shaped re-entrant auxetic structure designed to enhance mechanical performance by incorporating diamond-shaped elements into the re-entrant hexagonal configuration. Using a validated numerical model, the resistance of sandwich beams with the proposed core under localized impulsive loading is explored. The results reveal that local compression and global shear deformation dominate the response. The study further examines the effects of cell arrangement, geometric parameter, inclined gradient distribution, and cell construction on structural behavior. The X-direction arrangement of cells significantly enhances deformation control, improving deflection by dissipating impact energy. Increasing the angle α enhances mechanical properties and reduces residual deflection. Various inclined gradient distribution designs notably affect performance: positive gradients improve energy absorption, while negative gradients alter deformation mode. Under the same conditions, the proposed sandwich beam outperforms the conventional re-entrant hexagonal sandwich beam in terms of impact resistance. This research offers valuable insights for the design of explosion-resistant metamaterial sandwich structures. Full article
(This article belongs to the Special Issue Mechanical Properties and Structure of Metal Materials)
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