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Metals
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Magnesium Alloys: Structure, Properties and Applications
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Magnesium Alloys: Structure, Properties and Applications

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 6589

Special Issue Editors

Dr. Jianyue Zhang

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
Interests: magnesium alloys; aluminum alloys; casting; extrusion; mechanical properties; corrosion behavior
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Alan Luo

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
Interests: lightweight metal and alloy; casting, wrought and manufacturing technology; CALPHAD; microstructure simulation; finite element analysis; integrated computational materials engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnesium, as the lightest structural metal, is one of the most promising materials of the 21st century for both economic and environmental reasons. Mg is the third most abundant metallic element in the Earth’s crust (after aluminum and iron), and can be produced by the thermal reduction of magnesium oxide/dolomite ores or can be extracted from magnesium chloride in sea or salt lakes. Mg alloys provide attractive properties, such as a high specific strength, high specific stiffness, excellent biocompatibility, and recyclability. Mg alloys have seen increasing applications in the fields of automotive, aviation, aerospace, biomedical, electronics, and other consumer products. Thus, there has been increased research and development regarding Mg alloys, from alloy design and microstructure to properties and applications.

In the last few years, the properties of Mg alloys have been constantly improved by alloying or through casting and thermal mechanical processing, including extrusion, rolling, and forging. The improved properties are closely related to the microstructure control of Mg alloys, including grain refinement, texture modification, the formation of second phases, and precipitation. Great efforts have been made to understand the relationship between the structure and properties of Mg alloys.

In this Special Issue, we aim to provide a wide set of articles covering alloy design, microstructure modification, processing technologies, property development, and potential applications of Mg alloys. Performance-related topics are also welcome, including mechanical properties, corrosion resistance, wear resistance, biocompatibility, etc. For this Special Issue, we will collect regular research papers, reviews, and shot communications.

Dr. Jianyue Zhang
Prof. Dr. Alan Luo
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. 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

  • Magnesium alloys
  • Alloy development
  • Casting processes
  • Wrought processes
  • Microstructure
  • Crystallization
  • Mechanical properties
  • Corrosion resistance
  • Biomedical
  • Simulations

Published Papers (4 papers)

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Research

16 pages, 7351 KiB  
Article
Microstructure, Mechanical Properties and Fire Resistance of High Strength Mg-Gd-Y-Zr Alloys
by Yafeng Qian, Yanhui Zhao, Xiaorui Dong, Wei Yu, Jianhang Feng and Hui Yu
Metals 2022, 12(9), 1456; https://doi.org/10.3390/met12091456 - 30 Aug 2022
Cited by 6 | Viewed by 1291
Abstract
With the lightest green structural material for 21st century, a significant weight reduction effect was expected to solve the lightweight problem in aerospace and other fields. However, the material’s poor mechanical properties and flammability limited its widely application in such fields. In this [...] Read more.
With the lightest green structural material for 21st century, a significant weight reduction effect was expected to solve the lightweight problem in aerospace and other fields. However, the material’s poor mechanical properties and flammability limited its widely application in such fields. In this paper, the GWK series alloys (Mg-5.3Gd-4.11Y-0.13Zr, Mg-5.5Gd-4.22Y-0.19Zr, and Mg-5.46Gd-4.02Y-0.20Zr, in wt.%) were designed, and we explored the effect of alloy composition and process on the microstructure and properties of GWK series alloys subject to casting, homogenization, extrusion, ageing and ignition. The result show that Mg-5.3Gd-4.11Y-0.13Zr alloy after T4 treatment at 500 °C/6 h obtains an excellent solid solution effect. In addition, the aged alloy shows a good balance of mechanical properties, a tensile strength of 405 MPa, yield strength of 275 MPa, as well as elongation of 8.12%, and excellent non-flammability. Full article
(This article belongs to the Special Issue Magnesium Alloys: Structure, Properties and Applications)
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12 pages, 5293 KiB  
Article
Effect of Q235 Hot-Dip Galvanized and Post-Casting T6 Heat Treatment on Microstructure and Mechanical Properties of Interfacial between AZ63 and Q235 by Solid-Liquid Compound Casting
by Jiahong Dai, Hongmei Xie, Yangyang Zhou, Qin Zou, Yuan Tian, Qingshan Yang, Cheng Peng, Bin Jiang and Jianyue Zhang
Metals 2022, 12(7), 1233; https://doi.org/10.3390/met12071233 - 21 Jul 2022
Cited by 4 | Viewed by 1412
Abstract
AZ63 sacrificial anode is widely used to protect buried metal pipelines and reinforced concrete structures and so on. The interfacial metallurgical bonding between AZ63 sacrificial anode and Q235 wiring terminal directly affects its cathodic protection performance. Therefore, microstructure and mechanical properties of interfacial [...] Read more.
AZ63 sacrificial anode is widely used to protect buried metal pipelines and reinforced concrete structures and so on. The interfacial metallurgical bonding between AZ63 sacrificial anode and Q235 wiring terminal directly affects its cathodic protection performance. Therefore, microstructure and mechanical properties of interfacial between AZ63 and Q235 by solid–liquid compound casting with hot-dip galvanized and post-casting solution-aging treatment (T6) were investigated. The results indicate that hot-dip galvanizing on the surface of Q235 is beneficial to the formation of intermetallic compounds at the interface. At the same time, it can promote the metallurgical bonding of the interface between AZ63 and Q235. After T6 heat treatment, the intermetallic compound at the interface between AZ63 and galvanized Q235 was refined. The electron-probe microanalyzer (EPMA) revealed that the intermetallic compounds at the interfaces between AZ63 and galvanized Q235 were Fe2Al5 before and after T6 treatment. Push-out testing and microhardness were used to investigate the mechanical properties of interface between AZ63 and Q235. It is shown that the hot-dip galvanization of the Q235 surface and T6 treatment were beneficial to improve the metallurgical bonding shear strength and microhardness of the interface. After T6 heat treatment, the highest shear strength at the interface between AZ63 and galvanized Q235 was up to 31.9 ± 1.9 MPa. Full article
(This article belongs to the Special Issue Magnesium Alloys: Structure, Properties and Applications)
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7 pages, 2044 KiB  
Communication
A Superior High-Strength Dilute Mg-Bi-Ca Extrusion Alloy with a Bimodal Microstructure
by Shuaiju Meng, Mingchi Zhang, Haoran Xiao, Zhanju Luo, Wei Yu, Runlin Jiang, Xueqi Cheng and Lidong Wang
Metals 2022, 12(7), 1162; https://doi.org/10.3390/met12071162 - 07 Jul 2022
Cited by 3 | Viewed by 1137
Abstract
Improving the mechanical properties of Mg alloys is of great significance for their wide application. A micro-alloyed Mg-1.45Bi-0.79Ca alloy (in wt.%) exhibiting a high tensile yield strength of 394 ± 5 MPa and a moderate elongation of 6.6 ± 0.6% was fabricated by [...] Read more.
Improving the mechanical properties of Mg alloys is of great significance for their wide application. A micro-alloyed Mg-1.45Bi-0.79Ca alloy (in wt.%) exhibiting a high tensile yield strength of 394 ± 5 MPa and a moderate elongation of 6.6 ± 0.6% was fabricated by single pass extrusion. The superior high strength is mainly attributed to the synergy effects of ultra-fine dynamic recrystallized grains; numerous Mg2Ca, Mg3Bi2, and Mg2Bi2Ca nano-precipitates; residual dislocations; sub-grain boundaries; as well as strong <10-10> fibre texture in the extrusion direction. Full article
(This article belongs to the Special Issue Magnesium Alloys: Structure, Properties and Applications)
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10 pages, 9437 KiB  
Article
A Novel Mg–CaMgSn Master Alloy for Grain Refinement in Mg–Al-Based Alloys
by Jianyue Zhang, Guanyu Zhou, Bin Jiang, Alan Luo, Xuzhe Zhao, Aitao Tang and Fusheng Pan
Metals 2021, 11(11), 1722; https://doi.org/10.3390/met11111722 - 28 Oct 2021
Cited by 5 | Viewed by 1449
Abstract
A novel grain refinement method using a CaMgSn intermetallic phase was investigated via adding a Mg–CaMgSn master alloy to an AZ31 magnesium alloy. The results showed a remarkable grain refinement effect in as-cast AZ31, with the average grain size reduced from approximately 260–93 [...] Read more.
A novel grain refinement method using a CaMgSn intermetallic phase was investigated via adding a Mg–CaMgSn master alloy to an AZ31 magnesium alloy. The results showed a remarkable grain refinement effect in as-cast AZ31, with the average grain size reduced from approximately 260–93 μm after adding 0.45 wt.% CaMgSn particles. The added CaMgSn phase was found in grain interiors and acted as heterogeneous nucleation sites during solidification. The edge-to-edge matching model confirmed a low mismatch value of 2.3% for the {0002}Mg/{211}CaMgSn close-packed plane, suggesting that {211}CaMgSn was the possible matching plane for Mg nucleation. The microhardness and compressive yield strength were also improved by adding CaMgSn particles, confirming that adding Mg–CaMgSn master alloy was an effective method for refining the microstructure and improving the mechanical properties of Mg–Al-based alloys. Full article
(This article belongs to the Special Issue Magnesium Alloys: Structure, Properties and Applications)
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