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Microstructure, Texture, Properties of Mg Alloy and Its Application

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (10 July 2022) | Viewed by 2413

Special Issue Editors

College of Materials Science and Engineering, Taiyuan University of Technology, No. 79, West Yingze Street, Taiyuan, China
Interests: magnesium alloys; microstructure; texture; processing technology; corrosion; mechanical properties; degradable sectors
Special Issues, Collections and Topics in MDPI journals
Department of Materials Science and Engineering, Hybrid Materials, Seoul National University, Seoul, Republic of Korea
Interests: magnesium; twin rolling casting; alloy design; severe plastic deformation; extrusion; die casting; heat treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As the lightest metal structural material, magnesium alloys have in recent years been of interest to the automotive, aerospace, and 3C electronics industries, as well as for home appliances and biodegradable devices, owing to their low density (1.78g/cm3), high specific strength, high specific stiffness, good electromagnetic shielding and thermal conductivity, excellent biocompatibility, etc. Thus, Mg alloys are regarded as having the potential to become the most widely used green structure materials in the 21st century.

However, due to the special close-packed hexagonal (hcp) crystal structure of Mg alloys, a typical basal rolled or extruded texture is always generated which results in poor mechanical properties. Mg alloys’ strength is relatively low, their plasticity and formability at low temperatures are unsatisfactory, and their corrosion resistance is poor, which limit their applications. Thus, identifying how to improve the properties of Mg alloys is urgent if we want to promote their large-scale use in industries. These properties have been proven to be related to Mg alloys’ microstructures (composition, texture, grain size, second phases, etc.), and many methods have been developed to achieve the goal of improving these properties, such as alloy design, plastic deformation, powder metallurgy, etc. to control the microstructures and thus modify the mechanical properties, and surface treatment such as coating to improve corrosion resistance. Additionally, new technologies are being developed at the same time.

This Special Issue aims to publish the latest high-quality research results on Mg alloys, including Mg-based composites. Short communications, reviews, as well as regular length original articles are acceptable. All items related to Mg alloy design, microstructure and texture modification, casting and processing technologies, heat treatment, deformation mechanisms, corrosion behaviors, surface treatment, etc., and applications are welcomed. 

Prof. Dr. Lifei Wang
Prof. Dr. Kwang Seon Shin
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. Materials is an international peer-reviewed open access semimonthly 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

  • magnesium alloys
  • alloy design
  • casting
  • plastic deformation
  • heat treatment
  • surface treatment
  • microstructure
  • corrosion resistance
  • mechanical properties
  • formability

Published Papers (1 paper)

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Research

15 pages, 58751 KiB  
Article
Revealing the Microstructural Aspects of the Corrosion Dynamics in Rapidly Solidified Mg-Zn-Y Alloys Using the Acoustic Emission Technique
by Daria Drozdenko, Michiaki Yamasaki, Kristián Máthis, Patrik Dobroň, Shin-ichi Inoue and Yoshihito Kawamura
Materials 2021, 14(24), 7828; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14247828 - 17 Dec 2021
Cited by 3 | Viewed by 1757
Abstract
This work was focused on revealing the relation between the microstructure and corrosion dynamics in dilute Mg97.94Zn0.56Y1.5 (at.%) alloys prepared by the consolidation of rapidly solidified (RS) ribbons. The dynamics of the corrosion were followed by common electrochemical [...] Read more.
This work was focused on revealing the relation between the microstructure and corrosion dynamics in dilute Mg97.94Zn0.56Y1.5 (at.%) alloys prepared by the consolidation of rapidly solidified (RS) ribbons. The dynamics of the corrosion were followed by common electrochemical methods and the acoustic emission (AE) technique. AE monitoring offers instantaneous feedback on changes in the dynamics and mode of the corrosion. In contrast, the electrochemical measurements were performed on the specimens, which had already been immersed in the solution for a pre-defined time. Thus, some short-term corrosion processes could remain undiscovered. Obtained results were completed by scanning electron microscopy, including analysis of a cross-section of the corrosion layer. It was shown that the internal strain distribution, the grain morphology, and the distribution of the secondary phases play a significant role in the corrosion. The alloys are characterized by a complex microstructure with elongated worked and dynamically recrystallized α-Mg grains with an average grain size of 900 nm. Moreover, the Zn- and Y-rich stacking faults (SFs) were dispersed in the grain interior. In the alloy consolidated at a lower extrusion speed, the homogeneous internal strain distribution led to uniform corrosion with a rate of 2 mm/year and a low hydrogen release. The consolidation at a higher extrusion speed resulted in the formation of uneven distribution of internal strains with remaining high strain levels in non-recrystallized grains, leading to inhomogeneous growth and breakdown of the corrosion layers. Therefore, homogeneity of the internal strain distribution is of key importance for the uniform formation of a protective layer. Full article
(This article belongs to the Special Issue Microstructure, Texture, Properties of Mg Alloy and Its Application)
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