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Metals
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Metal Surface Degradation: Microstructural Analysis and Mechanical, Corrosive and Tribological...
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Metal Surface Degradation: Microstructural Analysis and Mechanical, Corrosive and Tribological Behavior

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Biobased and Biodegradable Metals".

Deadline for manuscript submissions: closed (10 November 2020) | Viewed by 11426

Special Issue Editor

Dr. Ana Isabel García-Diez

E-Mail Website
Guest Editor
Department of Naval and Industrial Engineer, Escuela Politécnica Superior, University of A Coruña, 15403 Ferrol, Spain
Interests: metallic materials; tribological behavior; microstructure; mechanical properties; thermal treatments; surface modification technology; fatigue behavior; welding technology

Special Issue Information

Dear Colleagues,

One of the main problems in the industry is the surface deterioration of metallic materials. Phenomena such as corrosion, wear, and fatigue originate from surfaces, and they can shorten the life of the components. Thus, it is essential to relate the changes of the surface microstructure during the service or manufacturing processes with the metal surface degradation. In this context, the discipline called Surface Engineering emerged almost half a century ago. This discipline can be defined as the field of science of materials that includes the application of physical and chemical technologies aimed at the modification of the surface of the materials in order to confer new properties and improve some characteristics inherent to the material.

For this purpose, this Special Issue aims to gather contributions that help to understand the influence of the service conditions and surface treatments (chemical surface modifications, heat treatments, coatings, surface finishing, etc.) on the microstructural structure of the metallic surfaces and their mechanical, corrosive, and tribological response.

Dr. Ana Isabel García-Diez
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

  • Microstructural analysis
  • Mechanical properties
  • Corrosion
  • Tribological behavior
  • Heat treatments
  • Coatings
  • Surface engineering
  • Manufacturing processes.

Published Papers (4 papers)

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Research

9 pages, 4045 KiB  
Article
Effect of the Substrate Biasing on the Structure and Properties of Tantalum Coatings Deposited Using HiPIMS in Deep Oscillations Magnetron Sputtering Mode
by Fábio Ferreira, Albano Cavaleiro and João Oliveira
Metals 2020, 10(12), 1618; https://doi.org/10.3390/met10121618 - 1 Dec 2020
Cited by 6 | Viewed by 1932
Abstract
The influence of energetic ion bombardment on the properties of tantalum coatings was studied. To achieve such energetic ion bombardment during the deposition process of tantalum coatings, a combination of deep oscillation magnetron sputtering (DOMS), an ionized physical vapour deposition technique, with substrate [...] Read more.
The influence of energetic ion bombardment on the properties of tantalum coatings was studied. To achieve such energetic ion bombardment during the deposition process of tantalum coatings, a combination of deep oscillation magnetron sputtering (DOMS), an ionized physical vapour deposition technique, with substrate biasing was used. The substrate biasing was varied between 0 and −120 V. In this work, the structure (XRD), microstructure (SEM), surface morphology (AFM) and hardness, and Young’s modulus (nanoindentation) of the coatings were characterized. The results show with the use of such conditions it was possible to deposit a pure α-Ta (the most desired at industrial level) with improved mechanical properties (hardness equal to 22.4 GPa and Young’s modulus equal to 235 GPa). The roughness of the Ta coatings decreases up to values of about 1 nm with an increase of substrate biasing. It was possible to deposit very dense Ta coatings with 2 µm of thickness. Therefore, these results are significantly different than in previous works, offering Ta coatings with a combination of very interesting properties. Full article
(This article belongs to the Special Issue Metal Surface Degradation: Microstructural Analysis and Mechanical, Corrosive and Tribological Behavior)
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11 pages, 2422 KiB  
Article
Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere
by Alejandro Fernández Muñoz, José Luis Mier Buenhombre, Ana Isabel García-Diez, Carolina Camba Fabal and Juan José Galán Díaz
Metals 2020, 10(9), 1260; https://doi.org/10.3390/met10091260 - 18 Sep 2020
Cited by 8 | Viewed by 2742
Abstract
This work studies the influence of the saline atmospheric corrosion on the fatigue strength of 6061-T6 aluminum alloy. For this purpose, this alloy was subjected to tests in a salt spray corrosion chamber at different exposure times (1, 2, and 3 months) according [...] Read more.
This work studies the influence of the saline atmospheric corrosion on the fatigue strength of 6061-T6 aluminum alloy. For this purpose, this alloy was subjected to tests in a salt spray corrosion chamber at different exposure times (1, 2, and 3 months) according to ASTM B117 standard. The morphological study of the pits was carried out by confocal microscopy. Subsequently, fatigue tests were performed at variable stresses whose maximum stress (Smax) was between 30% and 95% of the yield strength (S0) in order to keep them within the zone of elastic behavior of the material. Data were analyzed using the Basquin equation and the maximum likelihood function method. The results show a similar decrease in the conventional fatigue limit (2 × 106 cycles) after one month (98 MPa) and two months (91 MPa) of corrosion. After three months of corrosion, the material showed a very important reduction in the fatigue limit (68 MPa) with respect to the uncorroded material (131 MPa). The data of Se/S0 (fatigue limit/yield strength) versus the ratio Pm/Dm (pit average depth/pit diameter at zero depth) can be fitted to a logarithmic curve. Full article
(This article belongs to the Special Issue Metal Surface Degradation: Microstructural Analysis and Mechanical, Corrosive and Tribological Behavior)
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16 pages, 6962 KiB  
Article
Erosion–Corrosion of AISI 304L Stainless Steel Affected by Industrial Copper Tailings
by Álvaro Soliz, Luis Cáceres, Fabiola Pineda and Felipe Galleguillos
Metals 2020, 10(8), 1005; https://doi.org/10.3390/met10081005 - 27 Jul 2020
Cited by 4 | Viewed by 3486
Abstract
A comprehensive analysis of the erosion–corrosion behavior of AISI 304L stainless steel immersed in 0.5 M NaCl solution with the addition of industrial tailing particles obtained from the copper mining industry is reported. From fundamental studies using combined measurements of potentiodynamic and weight [...] Read more.
A comprehensive analysis of the erosion–corrosion behavior of AISI 304L stainless steel immersed in 0.5 M NaCl solution with the addition of industrial tailing particles obtained from the copper mining industry is reported. From fundamental studies using combined measurements of potentiodynamic and weight loss techniques, the pure corrosion, pure erosion, and their synergism on the total wear rate were evaluated. The results showed that the presence of soluble chemical reagents dragged by tailing particles significantly affects the pure corrosion rate in comparison with a NaCl solution without these chemical reagents. In addition, the wear of stainless steel by pure erosion was found to be more important than that of pure corrosion. Erosion–corrosion tests performed under an open circuit potential behavior indicate lower and higher wear values than that obtained for erosion and corrosion rates, respectively. Through these results, it was possible to determine an antagonistic effect for AISI 304L stainless steel in industrial tailings slurries. These results are supported by changes in the electrochemical parameters, passive film stability, and morphological attributes. Full article
(This article belongs to the Special Issue Metal Surface Degradation: Microstructural Analysis and Mechanical, Corrosive and Tribological Behavior)
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15 pages, 14423 KiB  
Article
Investigation of Corrosion Behaviors on an Fe/Cu-Type ACM Sensor under Various Environments
by Zibo Pei, Kui Xiao, Lihong Chen, Qing Li, Jun Wu, Lingwei Ma and Xiaogang Li
Metals 2020, 10(7), 905; https://doi.org/10.3390/met10070905 - 7 Jul 2020
Cited by 7 | Viewed by 2718
Abstract
The applicability of galvanic-cell-based atmospheric corrosion monitoring (ACM) technology has been confirmed empirically in field tests, however the corrosion behaviors on the ACM sensors have rarely been studied systematically. In this study, the influence of temperature, chloride ions, and hydrosulfite (simulated sulfur dioxide) [...] Read more.
The applicability of galvanic-cell-based atmospheric corrosion monitoring (ACM) technology has been confirmed empirically in field tests, however the corrosion behaviors on the ACM sensors have rarely been studied systematically. In this study, the influence of temperature, chloride ions, and hydrosulfite (simulated sulfur dioxide) ions on the corrosion behaviors of Fe/Cu-type ACM sensors was investigated. The results show that the hydrosulfite ions led to a larger increase in the Fe/Cu-based ACM current than chloride ions in the initial stage of corrosion, and both changed the components of the corrosion products. Moreover, the hydrosulfite and chloride ions showed a synergistic effect on the corroded ACM sensor. Lastly, a positive correlation between ACM technology and the mass loss method was observed, further indicating that ACM technology can be an effective, convenient, and fast approach to studying the accelerated corrosion behaviors of steels. Full article
(This article belongs to the Special Issue Metal Surface Degradation: Microstructural Analysis and Mechanical, Corrosive and Tribological Behavior)
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