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Crystals
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Advances in High-Performance Alloys
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Advances in High-Performance Alloys

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

Deadline for manuscript submissions: 30 November 2025 | Viewed by 429

Special Issue Editors

Dr. Huihui Zhi

E-Mail Website
Guest Editor
State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, Northwestern Polytechnical University, Xi'an 710072, China
Interests: steel and iron alloys; structural alloys; hydrogen embrittlement; alloy design; characterization
Dr. Cheng Wen

E-Mail Website
Guest Editor
College of Mechanical Engineering, Guangdong Ocean University, Zhanjiang 524000, China
Interests: alloy design; materials informatics; high-entropy alloys; marine corrosion
Dr. Kai Guan

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Jilin University, Changchun 130025, China
Interests: metals; Mg alloys; rare earth elements; microstructure characterization; mechanical property
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

High-performance alloys, such as medium-/high-entropy, aluminum, copper, titanium, and iron alloys, are key foundational materials in industrial applications. The requirements for improved mechanical properties, corrosion resistance, and hydrogen embrittlement properties have motivated a large number of studies.

Contributions are intended to show the influence of the thermomechanical process, chemical compositions, and microstructures on the property profiles. In addition to experimental approaches, the development of artificial intelligence is useful for predicting the composition–microstructure–property relationships of high-performance alloys. Therefore, this Special Issue will mainly focus on the latest advances in experimental characterization and machine learning for high-performance alloy design, aiding in revealing novel microstructure–property relationships from the atomic/nanometer to macroscopic scales.

Dr. Huihui Zhi
Dr. Cheng Wen
Dr. Kai Guan
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 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

  • high-entropy alloys
  • steels and iron alloys
  • magnesium alloys
  • aluminum alloys
  • copper alloys
  • titanium alloys
  • mechanical properties
  • corrosion resistance properties
  • hydrogen embrittlement
  • characterization
  • machine learning

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Published Papers (2 papers)

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Research

16 pages, 5622 KiB  
Article
Molecular Dynamics Simulations on the Deformation Behaviors and Mechanical Properties of the γ/γ′ Superalloy with Different Phase Volume Fractions
by Xinmao Qin, Wanjun Yan, Yilong Liang and Fei Li
Crystals 2025, 15(8), 706; https://doi.org/10.3390/cryst15080706 (registering DOI) - 31 Jul 2025
Abstract
Based on molecular dynamics simulation, we conducted a comprehensive study on the tensile behaviors and properties of the γ(Ni)/γ′(Ni3Al) superalloy with varying γ′(Ni3Al) phase volume fractions (Vγ′) under high-temperature, [...] Read more.
Based on molecular dynamics simulation, we conducted a comprehensive study on the tensile behaviors and properties of the γ(Ni)/γ′(Ni3Al) superalloy with varying γ′(Ni3Al) phase volume fractions (Vγ′) under high-temperature, high-strain-rate service environments. Our investigation revealed that the tensile behavior of the superalloy depends critically on the Vγ′. When the Vγ′ increased from 13.5 to 67%, the system’s tensile strength exhibited a non-monotonic response, peaking at Vγ′ = 40.3% before progressively decreasing. Conversely, the maximum uniform plastic strain decreased linearly and significantly when Vγ′ increased. These results establish an atomistically informed framework that elucidates the composition–microstructure–property relationships in γ(Ni)/γ′(Ni3Al) superalloys, specifically addressing how Vγ′ governs variations in deformation mechanisms and mechanical performance. Furthermore, this work provides quantitative design paradigm for optimizing γ′(Ni3Al) precipitate architecture and compositional tuning in the Ni-based γ(Ni)/γ′(Ni3Al) superalloy. Full article
(This article belongs to the Special Issue Advances in High-Performance Alloys)
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20 pages, 6807 KiB  
Article
Enhancing Electrochemical Kinetics and Stability of Biodegradable Mg-Y-Zn Alloys with LPSO Phases via Strategic Micro-Alloying with Ca, Sr, Mn, and Zr
by Lisha Wang, Huiping Wang, Chenchen Zhang, Wei Sun, Yue Wang, Lijuan Wang and Xiaoyan Kang
Crystals 2025, 15(7), 639; https://doi.org/10.3390/cryst15070639 - 11 Jul 2025
Viewed by 278
Abstract
This study systematically investigated the effects of biologically relevant microalloying elements—calcium (Ca), strontium (Sr), manganese (Mn), and zirconium (Zr)—on the electrochemical behavior of Mg-Y-Zn alloys containing long-period stacking ordered (LPSO) phases. The alloys were prepared by casting and characterized using X-ray diffraction (XRD), [...] Read more.
This study systematically investigated the effects of biologically relevant microalloying elements—calcium (Ca), strontium (Sr), manganese (Mn), and zirconium (Zr)—on the electrochemical behavior of Mg-Y-Zn alloys containing long-period stacking ordered (LPSO) phases. The alloys were prepared by casting and characterized using X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS). Electrochemical properties were assessed through potentiodynamic polarization in Hank’s solution, and corrosion rates were determined by hydrogen evolution and weight loss methods. Microalloying significantly enhanced the corrosion resistance of the base Mg-Y-Zn alloy, with corrosion rates decreasing from 2.67 mm/year (unalloyed) to 1.65 mm/year (Ca), 1.36 mm/year (Sr), 1.18 mm/year (Zr), and 1.02 mm/year (Mn). Ca and Sr additions introduced Mg2Ca and Mg17Sr2, while Mn and Zr refined the existing LPSO structure without new phases. Sr refined the LPSO phase and formed a uniformly distributed Mg17Sr2 network, promoting uniform corrosion and suppressing deep localized attacks. Ca-induced Mg2Ca acted as a temporary sacrificial phase, with corrosion eventually propagating along LPSO interfaces. The Mn-containing alloy exhibited the lowest corrosion rate; this is attributed to the suppression of both anodic and cathodic reaction kinetics and the formation of a stable protective surface film. Zr improved general corrosion resistance but increased susceptibility to localized attacks due to dislocation-rich zones. These findings elucidate the corrosion mechanisms in LPSO-containing Mg alloys and offer an effective strategy to enhance the electrochemical stability of biodegradable Mg-based implants. Full article
(This article belongs to the Special Issue Advances in High-Performance Alloys)
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