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Crystals
Special Issues
Preparation and Characterization of Precipitates in Magnesium Alloys
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Preparation and Characterization of Precipitates in Magnesium Alloys

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

Deadline for manuscript submissions: 25 September 2025 | Viewed by 686

Special Issue Editor

Dr. Yangxin Li

E-Mail Website
Guest Editor
State Key Laboratory of Metal Matrix Composite, National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai, China
Interests: magnesium alloys; precipitates; morphology; crystallography; advanced characterization; properties

Special Issue Information

Dear Colleagues,

Magnesium (Mg) alloys, celebrated for their exceptional strength-to-weight ratio, biocompatibility, and recyclability, are increasingly utilized in lightweight structural and biomedical applications. A critical determinant of Mg alloys is precipitates, which significantly influence properties such as strength, ductility, corrosion resistance, thermal stability and so on. Research into the preparation and characterization of these precipitates is thus vital for advancing the development of high-performance Mg alloys.

Precipitates in Mg alloys are formed through carefully controlled processes such as solution treatment, aging, and quenching. These processes produce fine, dispersed phases that enhance material performance by strengthening the alloy matrix. However, the complex chemical compositions and nanoscale structures of precipitation phases pose significant challenges for their characterization. Advanced analytical techniques, including transmission electron microscopy (TEM), atom probe tomography (APT), synchrotron X-ray diffraction (XRD), and small-angle neutron scattering, have proven invaluable in revealing their microstructural details, compositional evolution, and interactions with the alloy matrix. Computational modeling and simulations also play an increasingly important role, offering insights into precipitation mechanisms and phase stability that complement experimental findings.

This call for contributions seeks high-quality original research, reviews, and perspectives focused on the preparation, characterization, and performance of precipitates in Mg alloys. Topics of interest include innovative heat treatment techniques, ex-situ and in-situ studies of phase evolution, advanced microscopy and spectroscopy methods, the influence of alloying elements on precipitation behavior, and the relationship between precipitates and alloy performance. We also welcome studies exploring novel applications of Mg alloys enabled by tailored precipitates.

We invite researchers of materials science, metallurgy, and engineering to contribute their insights and findings to this exciting area of study. Your work will play a pivotal role in advancing the understanding and application of Mg alloys.

Dr. Yangxin Li
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

  • magnesium alloys
  • precipitates
  • morphology
  • crystallography
  • advanced characterization
  • properties

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Published Papers (1 paper)

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Research

8 pages, 2084 KiB  
Communication
Crystallography and Morphology of (Gd,Y)H2 Hydride in a Mg-Gd-Y-Al Alloy
by Kun Chen, Yangxin Li, Yang Su, Shufen Chu, Zhihao Xiong, Dong Qiu and Xiaoqin Zeng
Crystals 2025, 15(3), 249; https://doi.org/10.3390/cryst15030249 - 6 Mar 2025
Viewed by 471
Abstract
Hydrogen can be easily captured by the rare-earth (RE) elements in hydrogen-rich environments, which significantly affect the phase compositions and mechanical performance of Mg-RE based alloys. However, the morphology of RE hydrides and their orientation relationships (ORs) with the Mg matrix have not [...] Read more.
Hydrogen can be easily captured by the rare-earth (RE) elements in hydrogen-rich environments, which significantly affect the phase compositions and mechanical performance of Mg-RE based alloys. However, the morphology of RE hydrides and their orientation relationships (ORs) with the Mg matrix have not been well explained. Here, a stable face-centered cubic (FCC) Gd,YH2 hydride was introduced and uniformly distributed in a Mg-15Gd-2.5Y-1Al alloy after hydrogenation treatment at 500 °C and 2 MPa for 40 h. The plate-like Gd,YH2 hydride with six variants was identified to exhibit an OR with the magnesium (Mg) matrix, which is [0001]Mg//[001]Gd,YH2, (101¯0)Mg10.5∘ from (002)Gd,YH2, (12¯10)Mg10.5∘ from (020)Gd,YH2. Further crystallographic matching calculations based on the edge-to-edge matching model suggest that such an OR is energetically favorable and provides the actual interface between the RE hydrides and the Mg matrix during precipitation. Our findings offer new insights into the microstructural regulation of Mg alloys in hydrogenation environments. Full article
(This article belongs to the Special Issue Preparation and Characterization of Precipitates in Magnesium Alloys)
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