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Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys
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Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Corrosion, Wear and Erosion".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 9216

Special Issue Editors

Prof. Dr. Zhu Xiao

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Central South University, Changsha 410083, China
Interests: copper alloy; shape memory alloy; advanced manufacturing; corrosion; mechanical properties; defects; microstructure
Special Issues, Collections and Topics in MDPI journals
Dr. Emily Chen

E-Mail Website
Guest Editor
Monash Centre for Electron Microscopy, Monash University, Melbourne, VIC, Australia
Interests: fatigue of light metals and surface treatment

Special Issue Information

Dear Colleagues,

Nonferrous metal alloys with a matrix of aluminum, copper, magnesium, titanium, and other metals have been widely used in many industries. In most cases, the failure of these nonferrous metal alloys is attributed to their corrosion. Some nonferrous metal alloys with high corrosion resistance are currently being developed, and the corresponding corrosion behavior and mechanism become of importance regarding application. For this Special Issue, we welcome submissions on studies being carried out in this field which are focused on the design of novel nonferrous metal alloys with good corrosion resistance, the corrosion behavior and mechanism of nonferrous metal alloys in different environments, methods for the protection of nonferrous metal alloys, and surface coating technologies for nonferrous metal alloys. Articles describing other directions within the field of the production of nonferrous metal alloys with good corrosion resistance are also welcome.

Prof. Dr. Zhu Xiao
Dr. Emily Chen
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. Coatings 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

  • nonferrous metal alloys
  • electrochemical corrosion
  • polarization
  • corrosion thermodynamics
  • diffusion
  • dezincification
  • stress corrosion cracking
  • surface coating
  • passive film

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Published Papers (5 papers)

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Research

14 pages, 11239 KiB  
Article
The Microstructure Evolution and Dynamic Recrystallization Mechanism of Cu-1.1–Ni-0.7–Co-0.45–Si-0.3Cr Alloys during High-Temperature Deformation
by Meng Zhou, Yunzhang Li, Shunlong Tang, Yijie Ban, Yi Zhang, Bin Gan, Xu Li, Lihua Fu, Baohong Tian, Yong Liu and Alex A. Volinsky
Coatings 2023, 13(3), 660; https://doi.org/10.3390/coatings13030660 - 22 Mar 2023
Viewed by 1759
Abstract
Copper alloys with a combination of good electrical conductivity and mechanical properties are widely used in automotive electronics, large-scale integrated circuits, and other fields. In this study, a new type of Cu–Ni–Si alloy with added trace elements of Co and Cr was fabricated. [...] Read more.
Copper alloys with a combination of good electrical conductivity and mechanical properties are widely used in automotive electronics, large-scale integrated circuits, and other fields. In this study, a new type of Cu–Ni–Si alloy with added trace elements of Co and Cr was fabricated. Hot compression tests of this alloy at different temperatures and strain rates were conducted using a Gleeble-1500D simulator. Then, the microstructure transformation and precipitation behaviors of the Cu-1.1–Ni-0.7–Co-0.45–Si-0.3Cr alloy were studied during a hot deformation process. The results show that the hot deformation behavior of the Cu-1.1–Ni-0.7–Co-0.45–Si-0.3Cr alloy includes continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX). The intensity of the texture in the microstructure is decreased, and the randomness of the texture in the microstructure is increased together with the recrystallization progress. The degree of recrystallization of the new Cu-1.1–Ni-0.7–Co-0.45–Si-0.3Cr alloy is increased when the hot deformation temperature rises. Additionally, the results indicate that there are two types of precipitates which are formed in the alloy during the hot deformation process. These two precipitates can pin dislocations and grain boundaries, and therefore, they significantly improve the hot compression resistance of the Cu-1.1–Ni-0.7–Co-0.45–Si-0.3Cr alloy. Full article
(This article belongs to the Special Issue Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys)
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15 pages, 7474 KiB  
Article
Densification, Microstructure and Anisotropic Corrosion Behavior of Al-Mg-Mn-Sc-Er-Zr Alloy Processed by Selective Laser Melting
by Jinglin Shi, Qiang Hu, Xinming Zhao, Jiahao Liu, Jiacheng Zhou, Weichen Xu and Yaolong Chen
Coatings 2023, 13(2), 337; https://doi.org/10.3390/coatings13020337 - 2 Feb 2023
Cited by 4 | Viewed by 1971
Abstract
High-performance additives manufactured by Al alloys provide significant potential for lightweight applications and have attracted much attention nowadays. However, there is no research on Sc, Er and Zr microalloyed Al alloys, especially concerning corrosion behavior. Herein, crack-free and dense Al-Mg-Mn-Sc-Er-Zr alloys were processed [...] Read more.
High-performance additives manufactured by Al alloys provide significant potential for lightweight applications and have attracted much attention nowadays. However, there is no research on Sc, Er and Zr microalloyed Al alloys, especially concerning corrosion behavior. Herein, crack-free and dense Al-Mg-Mn-Sc-Er-Zr alloys were processed by selective laser melting (SLM). After optimizing the process parameters of SLM, the anisotropic corrosion behavior of the sample (volume energy density of 127.95 J·mm−3) was investigated by intergranular corrosion (IGC) and electrochemical measurements. The results showed that the XY plane of the as-built sample is less prone to IGC, and it also has a higher open circuit potential value of −901.54 mV, a higher polarization resistance of 2.999 × 104 Ω·cm2, a lower corrosion current of 2.512 μA·cm−2 as well as passive film with superior corrosion resistance compared to the XZ plane. According to our findings, the XY plane has superior corrosion resistance compared to the XZ plane because it has fewer primary phases of Al3(Sc, Er, Zr) and Al2MgO4, which can induce localized corrosion. Additionally, a higher fraction of low-angle grain boundaries (LAGBs) and a stronger (001) texture index along the building direction are also associated with better corrosion resistance of the XY plane. Full article
(This article belongs to the Special Issue Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys)
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14 pages, 2961 KiB  
Article
Porous Nickel Electrode for Highly Sensitive Non-Enzyme Electrochemical Glucose Detection
by Zejun Wang and Yuyuan Zhao
Coatings 2023, 13(2), 290; https://doi.org/10.3390/coatings13020290 - 27 Jan 2023
Cited by 1 | Viewed by 1697
Abstract
Porous metals have great potential for applications in non-enzyme glucose detection because they have a high surface area and therefore improved the sensitivity of detection and the accuracy of measurement. An LCS/DHBT porous nickel with both macropores (710–1000 μm) and microscale pores (1–25 [...] Read more.
Porous metals have great potential for applications in non-enzyme glucose detection because they have a high surface area and therefore improved the sensitivity of detection and the accuracy of measurement. An LCS/DHBT porous nickel with both macropores (710–1000 μm) and microscale pores (1–25 μm) has been produced by combining the Lost Carbonate Sintering (LCS) and Dynamic Hydrogen Bubble Template (DHBT) processes. Its behavior for glucose measurement has been studied by cyclic voltammetry and compared with a nickel plate and the LCS porous nickel substrate. The as-fabricated porous nickel has an electroactive surface area 18% higher than the LCS porous nickel. The anodic peak current density of the LCS/DHBT electrode in an electrolyte of 0.1 M KOH containing 0.5 mM glucose at scan rates in the range of 25–300 mV/s are in the range of 3.43–13.94 mA/cm2, which is approximately 2 and 10 times those of the plate and LCS electrodes. Increasing the scan rate results in a higher current density and a larger anodic peak potential shift. Current density increases with glucose concentration in several linear segments. The sensitivity and limit of detection of LCS/DHBT nickel electrode in the glucose measurement are 5775 μA/cm2mM and 0.66–2.91 μΜ, respectively. It shows excellent performance for glucose measurement due to its porous nanostructure and its highly effective surface area. Full article
(This article belongs to the Special Issue Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys)
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11 pages, 4549 KiB  
Article
Study on Effect of High-Entropy Alloy Binder on Microstructure and Properties of WC Cemented Carbide Doped with Rare Earth Oxide
by Yongqiang Qin, Jian Yuan, Yi Zhuang, Bing Ma, Laima Luo and Yucheng Wu
Coatings 2023, 13(2), 273; https://doi.org/10.3390/coatings13020273 - 25 Jan 2023
Cited by 2 | Viewed by 1823
Abstract
The AlCoCrFeNi powder was added to WC powder as a binder and Y2O3/ZrO2 was doped by the wet chemical method as grain-growth inhibitors. The WC-Y2O3-ZrO2-10AlCoCrFeNi composite powders were sintered by spark plasma [...] Read more.
The AlCoCrFeNi powder was added to WC powder as a binder and Y2O3/ZrO2 was doped by the wet chemical method as grain-growth inhibitors. The WC-Y2O3-ZrO2-10AlCoCrFeNi composite powders were sintered by spark plasma sintering to obtain an alloy. The microstructure and properties of the cemented carbide were studied. The result showed that the rare-earth-oxide (Y2O3/ZrO2)-refined grain size of the alloy and the high-entropy alloy binder provided the alloy with better hardness and toughness. The AlCoCrFeNi diffused slowly between the WC grains because of a delayed diffusion effect and Cr having a low affinity for the WC matrix. During the dynamic process of the WC particles’ dissolution and precipitation growth, the Fe, Co, and Ni that had a better affinity for the WC matrix diffused and distributed more smoothly, which increased the strength and toughness of the alloy. When the temperature of the SPS sintering was 1250 °C, the WC-Y2O3-ZrO2-10AlCoCrFeNi cemented carbide had the best properties, which was a Vickers hardness of 1888.14 HV and a fracture toughness of 14.76 MPa·m1/2. Full article
(This article belongs to the Special Issue Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys)
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14 pages, 7430 KiB  
Article
Effect of Y2O3 on the Electrical Contact Behavior of Al2O3-Cu/MoTa Composites
by Yunzhang Li, Meng Zhou, Yi Zhang, Hanjing Zhu, Xianhua Zheng, Shengli Liang, Shunlong Tang, Baohong Tian, Yong Liu, Xu Li, Alex A. Volinsky and Chenglin Zheng
Coatings 2023, 13(2), 252; https://doi.org/10.3390/coatings13020252 - 21 Jan 2023
Cited by 2 | Viewed by 1596
Abstract
With the massive penetration of electronics into human life, higher demands are placed on electrical contacts. Among them, the lifetime of electrical contacts and safety are the most concerning. In this research, Al2O3-Cu/25Mo5Ta and 0.5Y2O3/Al [...] Read more.
With the massive penetration of electronics into human life, higher demands are placed on electrical contacts. Among them, the lifetime of electrical contacts and safety are the most concerning. In this research, Al2O3-Cu/25Mo5Ta and 0.5Y2O3/Al2O3-Cu/25Mo5Ta composites were prepared by using ball milling and powder metallurgy methods. The two composites were subjected to 10,000 contact opening and closing electrical contact experiments and the arc duration and arc energy were analyzed. The results show that the addition of Y2O3 has a slight effect on the mechanical properties of the Al2O3-Cu/25Mo5Ta composites but has a significant effect on the electrical contact performance. Y2O3 can reduce the mass loss of the electrical contacts during the electrical contact process, which prolongs their service life. The addition of Y2O3 decreased the average arc duration and arc energy of the electrical contact material by 21.53% and 18.02%, respectively, under the experimental conditions of DC 30 V, 10 A. TEM results showed that nanoscale YTaO4 with excellent thermal stability was generated during the sintering process, which has a positive effect on the electrical contact performance of the composites. Full article
(This article belongs to the Special Issue Microstructure Evolution, Mechanical Properties, and Applications of Nonferrous Metal Alloys)
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