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Special Issue Editor

Dr. Hüseyin Zengin

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Guest Editor

Institute of Chemical Technology of Inorganic Materials (TIM), Johannes Kepler University Linz, Linz 4040, Austria
Interests: magnesium alloys; alloy development; plastic deformation; microstructure; mechanical properties; corrosion

Special Issue Information

Dear Colleagues,

Magnesium alloys have garnered increasing recognition as the lightest structural metal, boasting impressive characteristics such as remarkable specific strength, castability, formability at high temperatures and damping capacity. These outstanding attributes position magnesium as a promising choice for a wide range of engineering applications. On the other hand, several properties such as strength at high temperatures and corrosion resistance have remained inferior to its counterparts. Consequently, numerous attempts have been made already to enhance these properties. Nevertheless, there is a continuing need to comprehend the connections between microstructure and mechanical-corrosion properties in different alloys. This understanding is crucial for the advancement of next-generation magnesium alloys with superior performance.

This Special Issue has the clear objective of establishing an inclusive forum for materials scientists and engineers to exchange and distribute the latest research breakthroughs concerning the properties of magnesium alloys. The potential subjects covered in this Special Issue are microstructure evolution, new alloy development, heat treatment, plastic deformation, mechanical properties, surface treatment, corrosion and corrosion protection. It warmly welcomes original research and review articles.

Dr. Hüseyin Zengin
Guest Editor

Manuscript Submission Information

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Keywords

magnesium alloys
alloy development
plastic deformation
microstructure
mechanical properties
corrosion

Published Papers (3 papers)

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Editorial

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2 pages, 159 KiB

Open AccessEditorial

Microstructure, Corrosion and Mechanical Properties of Magnesium Alloys

by Hüseyin Zengin

Metals 2023, 13(9), 1596; https://doi.org/10.3390/met13091596 - 15 Sep 2023

Cited by 1 | Viewed by 864

Abstract

The properties of magnesium (Mg) and its alloys such as uniquely high specific strength (strength-to-density ratio), good castability, excellent machinability, adequate high-temperature formability and high damping capacity have garnered significant interest from researchers and product designers, especially in the automotive and aerospace industries, [...] Read more.

(This article belongs to the Special Issue Microstructure, Corrosion and Mechanical Properties of Magnesium Alloys)

Research

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14 pages, 12910 KiB

Open AccessArticle

Study on the Microstructure and Properties of Mg-Gd-Ni-Y Alloy Containing LPSO Phase

by Jibin Zhang, Mingxing Li, Yuming Lai, Lei Wen, Yibo Ai, Xuechong Ren and Weidong Zhang

Metals 2023, 13(12), 1989; https://doi.org/10.3390/met13121989 - 7 Dec 2023

Viewed by 922

Abstract

The long-period stacking ordered (LPSO) structure, functioning as a strengthening phase in magnesium alloys, plays a pivotal role in compensating for inherent performance limitations. In this study, an as-cast Mg-Gd-Ni-Y alloy, including the LPSO phase, was initially obtained through an ingot metallurgy process. Subsequently, the alloy underwent distinct thermal treatments: annealing at 500 °C for 10 h, and extrusion using an extrusion ratio of 10 at a speed of 5 mm/s. Comparative analysis of the microstructure and corrosion characteristics was performed across these three alloy states. Comprising primarily of α-Mg, LPSO phase, and eutectic structures (ES), the alloy exhibited distinctive microstructural features. Immersion experiments conducted in a 3.5% NaCl solution revealed that the as-cast alloy displayed the highest dissolution rate at various temperatures, from room temperature, to 50 °C, and 70 °C. Following annealing, a reduction in the second phase content within the alloy significantly contributed to the observed decrease in its dissolution rate. Extrusion processes resulted in a denser network structure within the microarchitecture, to some extent impeding the spread of corrosion to some extent. By emloying scanning Kelvin probe force microscopy (SKPFM) and micro-electrochemical testing, it was discerned that predominantly the electrochemical system involving α-Mg and the second phases predominantly dictated the heightened dissolution rate of the alloy. This study presents valuable insights into understanding the dissolution mechanisms and potential strategies for controlling the dissolution performance of magnesium alloys containing the LPSO phase. Full article

(This article belongs to the Special Issue Microstructure, Corrosion and Mechanical Properties of Magnesium Alloys)

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14 pages, 18962 KiB

Open AccessArticle

Effect of Indium on the Properties of Mg-Zn-Based Alloys

by Kamil Kowalski, Mikolaj Kozlowski, Natalia Lukaszkiewicz, Mateusz Kobus, Jakub Bielecki and Mieczyslaw Jurczyk

Metals 2023, 13(10), 1786; https://doi.org/10.3390/met13101786 - 22 Oct 2023

Viewed by 1006

Abstract

In this study, indium was added to the binary Mg-Zn alloy to prepare an ultrafine-grained ternary Mg-Zn-In alloy with enhanced mechanical and corrosion properties. The bulk Mg-Zn-In alloy was synthesized through a combination of mechanical alloying and powder metallurgy techniques. The SPEX 8000 mixer mill was used to carry out the process under an argon atmosphere. The mixed powders were mechanically alloyed for 24 h. The mixture was uniaxially pressed at a compacting pressure of 600 MPa. The green compacts were sintered under a protective argon atmosphere at 300 °C for 1 h. The evolution of the microstructural, mechanical, and corrosion properties of Mg-based alloys was studied. X-ray diffraction and scanning electron microscopy were used to analyze the phase and microstructure. The changes in hardness and corrosion properties were also measured. Compared to binary Mg-Zn alloy samples modified with In, the samples exhibited a higher microhardness, which can be related to structure refinement and phase distribution. Based on the results of electrochemical testing, it was observed that the modified samples exhibited an improved level of corrosion resistance compared to the Mg-Zn binary alloy. Full article

(This article belongs to the Special Issue Microstructure, Corrosion and Mechanical Properties of Magnesium Alloys)

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