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Metals
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Magnesium Alloys: Design, Processing and Properties
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Magnesium Alloys: Design, Processing and Properties

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 5734

Special Issue Editor

Prof. Dr. Huan Liu

E-Mail Website
Guest Editor
College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Interests: magnesium alloys; severe plastic deformation; strengthening and toughening of metallic materials; biodegradable metallic materials; corrosion behavior

Special Issue Information

Dear Colleagues,

Magnesium alloys are the lightest structural materials possessing good heat dissipation and damping characteristics. They are extensively used in automotive applications. Moreover, the development of biocompatible and biodegradable magnesium alloys is in full swing in the biomedical field. The urgency to address new challenges and to advance the field has created an ever-increasing demand for developing novel magnesium products with improved mechanical and physical properties, crash performance, and corrosion resistance. The future of magnesium alloys, as well as their related products, will be highly dependent on clever alloy design (including chemistry, structure, and new strategies based on a better understanding of the fundamental deformation and corrosion behaviors of magnesium alloys) and optimization of the processing stages, such as casting, extrusion, rolling, forging, severe plastic deformation, surface treatments, and other novel technologies.

This Special Issue covers original research and review articles on recent advances in all aspects of magnesium alloy development, synthesis, heat treatment, phase transformation, computer simulation, failure process, and application related topics.

Prof. Dr. Huan Liu
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. Metals 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 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

  • Novel magnesium alloys design
  • Solidification
  • Plastic deformation
  • Strengthening and toughening
  • Magnesium matrix composite
  • Creep, corrosion and fatigue of magnesium alloys
  • Magnesium-based functional materials

Published Papers (3 papers)

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Research

10 pages, 5187 KiB  
Article
Effect of Equal Channel Angular Pressing on the Microstructure and Mechanical Properties of an Mg–5Sn Alloy
by Xiaoru Zhuo, Cong Shao, Peng Zhang, Zhichao Hu and Huan Liu
Metals 2022, 12(8), 1341; https://doi.org/10.3390/met12081341 - 12 Aug 2022
Cited by 6 | Viewed by 1221
Abstract
An Mg–5Sn alloy was processed by equal channel angular pressing (ECAP) for different passes (4P, 8P, and 12P), and the microstructure evolution and mechanical properties were investigated. The grain size, amount of Mg2Sn precipitates, and texture of ECAP alloys depend on [...] Read more.
An Mg–5Sn alloy was processed by equal channel angular pressing (ECAP) for different passes (4P, 8P, and 12P), and the microstructure evolution and mechanical properties were investigated. The grain size, amount of Mg2Sn precipitates, and texture of ECAP alloys depend on the number of passes. The ECAP 8P alloy has the finest grains and largest area fraction of Mg2Sn particles, followed by the ECAP 12P alloy. The ECAP 4P and 8P alloys exhibit basal textures tilted towards transverse direction (TD), whereas the ECAP 12P alloy shows basal texture with the c-axis of the grains parallel to the extrusion direction (ED). ECAP alloys show superior strengths compared to the as-cast alloy, mainly attributed to fine grain strengthening, precipitation strengthening, texture strengthening, and dislocation strengthening. The ultimate tensile strength (UTS) increases while the elongation (EL) decreases with increasing ECAP pass. Full article
(This article belongs to the Special Issue Magnesium Alloys: Design, Processing and Properties)
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15 pages, 4425 KiB  
Article
Dual-Layer Corrosion-Resistant Conversion Coatings on Mg-9Li Alloy via Hydrothermal Synthesis in Deionized Water
by Dan Song, Beibei Lian, Yulong Fu, Guowei Wang, Yanxin Qiao, Eyram Edwin Klu, Xinyue Gong and Jinghua Jiang
Metals 2021, 11(9), 1396; https://doi.org/10.3390/met11091396 - 3 Sep 2021
Cited by 8 | Viewed by 1888
Abstract
The formation of a corrosion-resistant coating by the hydrothermal method is an effective way to provide significant protection to magnesium alloys. However, it is a challenge to prepare such a coating on magnesium-lithium alloys because of its high chemical activity. Herein, the dual-layer [...] Read more.
The formation of a corrosion-resistant coating by the hydrothermal method is an effective way to provide significant protection to magnesium alloys. However, it is a challenge to prepare such a coating on magnesium-lithium alloys because of its high chemical activity. Herein, the dual-layer structured corrosion-resistant conversion coating composed with Mg(OH)2 and LiOH was successfully synthesized on Mg-9Li alloy by the optimization of the hydrothermal reaction in deionized water. The coating synthesized at 140 °C for 2 h has the best anti-corrosion performance in all obtained coatings, which has a uniform and compact coating with thickness of about 3 μm. The improvement of the hydrophobicity due to the stacking structure of the surface layer, as well as the barrier effect of its inner compact coating on corrosive media, lead to the excellent anti-corrosion performance of the obtained hydrothermal conversion coating Full article
(This article belongs to the Special Issue Magnesium Alloys: Design, Processing and Properties)
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18 pages, 8724 KiB  
Article
Microstructural Stability of Extruded Mg-Mn-Ce Hollow Profiles with Weld Seams
by Felix Gensch, Sven Gall, Stefan Lechner, Christoph Fahrenson and Soeren Mueller
Metals 2021, 11(4), 547; https://doi.org/10.3390/met11040547 - 27 Mar 2021
Viewed by 1803
Abstract
Despite aluminum profiles, magnesium profiles have not been well developed due to the low formability. Furthermore, extruded magnesium profiles show a strong dependence on the mechanical properties, according to the loading direction. This is caused by a strong basal texture, which is directly [...] Read more.
Despite aluminum profiles, magnesium profiles have not been well developed due to the low formability. Furthermore, extruded magnesium profiles show a strong dependence on the mechanical properties, according to the loading direction. This is caused by a strong basal texture, which is directly dependent on the process parameters during the extrusion and the subsequent aging. Thus, the present paper focuses on the analysis of the microstructure and its evolution of extruded magnesium hollow profiles, which were subjected to a series of heat treatments at 475 °C up to one hour. The hollow profiles were extruded through a porthole die, thus, containing longitudinal weld seams. These were formed by material that underwent heavy shearing along the tool surface based on the friction conditions in the porthole die. Three extrusion ratios (ER = 8:1, ER = 16:1, ER = 30:1) were applied, resulting in three different wall thicknesses of the profiles. The microstructure of the profiles was analyzed using light-optical microscopy (LOM) and scanning electron microscopy (SEM) coupled with electron backscatter diffraction (EBSD). The analysis revealed no change of the microstructure of the profiles extruded at the two higher extrusion ratios within the time frame of the heat treatment. In contrast, the microstructure and, thus, the micro-texture of the profile with the lowest extrusion ratio (ER = 8:1) has been affected to a great extent. While only small changes in microstructure in the weld-free area were observed, the initial microstructure in the weld seam was transformed from fine recrystallized grains into a significantly bimodal microstructure mainly due to an abnormal grain growth (AGG). These changes were accompanied by a promotion of the rare-earth (RE) texture component for the weld-free material and a change of the overall texture from RE to a typical non-RE double fiber texture for the weld seam due to the intense AGG within the short-time heat treatments. In addition, the influence of the extrusion ratio on particle size and distribution as well as the character of the microstructure governing the behavior during heat treatments was analyzed and discussed. Full article
(This article belongs to the Special Issue Magnesium Alloys: Design, Processing and Properties)
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