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Structure and Properties of Crystalline and Amorphous Alloys-Part II

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 18 October 2024 | Viewed by 2317

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Guest Editor
Faculty of Mechanical Engineering, Silesian University of Technology, Gliwice, Poland
Interests: materials engineering; amorphous and nanocrystalline materials; functional materials; nanomaterials; metallic glasses; biomaterials; computer modelling of amorphous structure
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Special Issue Information

Dear Colleagues,

Metallic alloys are used in a wide variety of applications, from the structural alloys used in buildings, automobiles, machines, factories to functional alloys used in medical, electronic, or sport devices. In some cases, a combination of metals and metalloids may reduce the overall cost of a material, while maintaining usable properties. The combination of metals and non-metals adds synergistic properties to the constituent metal elements, such as density, conductivity, corrosion resistance, hardness or tensile strength. It is generally known that the preparation of alloys with expected structures (e.g., amorphous, nanocrystalline, quasicrystalline, crystalline) is difficult and requires the selection of cooling rates of the liquid alloys, annealing, or sintering conditions. The formation of amorphous, nanocrystalline, or quasicrystalline structures allows us to achieve physicochemical properties better than those of their crystalline counterparts.

Special Issue - Part II will continue to focus on research papers that explore metallic materials based on multi-component alloys with amorphous, nanocrystalline, quasicrystalline, and crystalline structures. Papers on supercooled alloys, as well as nanostructured materials, will also be considered. Papers involving construction and functional alloys with modifications of surfaces, in terms of mechanical, electrical, magnetic, thermal, and corrosion properties and structural analysis and modelling, will also be included.

We invite you to contribute full papers, reviews, or communications to this Special Issue. In all cases, the papers must demonstrate originality and be relevant to the scope of this issue.

Prof. Dr. Rafał Babilas
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. Materials is an international peer-reviewed open access semimonthly 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

  • multi-component alloys
  • crystalline, nanocrystaline, and quasicrystalline materials
  • conventional and bulk metallic glasses
  • functional and smart materials
  • corrosion and electrochemical measurements
  • electrical and magnetic properties
  • mechanical properties
  • structural characterization and modeling

Published Papers (2 papers)

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Research

13 pages, 6941 KiB  
Article
The Effect of Annealing on the Soft Magnetic Properties and Microstructure of Fe82Si2B13P1C3 Amorphous Iron Cores
by Wei Zheng, Guangqiang Zhang, Qian Zhang, Haichen Yu, Zongzhen Li, Mingyu Gu, Su Song, Shaoxiong Zhou and Xuanhui Qu
Materials 2023, 16(16), 5527; https://doi.org/10.3390/ma16165527 - 9 Aug 2023
Viewed by 957
Abstract
This research paper investigated the impact of normal annealing (NA) and magnetic field annealing (FA) on the soft magnetic properties and microstructure of Fe82Si2B13P1C3 amorphous alloy iron cores. The annealing process involved various methods [...] Read more.
This research paper investigated the impact of normal annealing (NA) and magnetic field annealing (FA) on the soft magnetic properties and microstructure of Fe82Si2B13P1C3 amorphous alloy iron cores. The annealing process involved various methods of magnetic field application: transverse magnetic field annealing (TFA), longitudinal magnetic field annealing (LFA), transverse magnetic field annealing followed by longitudinal magnetic field annealing (TLFA) and longitudinal magnetic field annealing followed by transverse magnetic field annealing (LTFA). The annealed samples were subjected to testing and analysis using techniques such as differential scanning calorimetry (DSC), transmission electron microscopy (TEM), X-ray diffraction (XRD), magnetic performance testing equipment and magneto-optical Kerr microscopy. The obtained results were then compared with those of commercially produced Fe80Si9B11. Fe82Si2B13P1C3 demonstrated the lowest loss of P1.4T,2kHz = 8.1 W/kg when annealed in a transverse magnetic field at 370 °C, which was 17% lower than that of Fe80Si9B11. When influenced by the longitudinal magnetic field, the magnetization curve tended to become more rectangular, and the coercivity (B3500A/m) of Fe82Si2B13P1C3 reached 1.6 T, which was 0.05 T higher than that of Fe80Si9B11. During the 370 °C annealing process of the Fe82Si2B13P1C3 amorphous iron core, the internal stress in the strip gradually dissipated, and impurity domains such as fingerprint domains disappeared and aligned with the length direction of the strip. Consequently, wide strip domains with low resistance and easy magnetization were formed, thereby reducing the overall loss of the amorphous iron core. Full article
(This article belongs to the Special Issue Structure and Properties of Crystalline and Amorphous Alloys-Part II)
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13 pages, 34122 KiB  
Article
Formation, Microstructure, and Properties of Dissimilar Welded Joint between CrMnFeCoNi and Fe
by Krzysztof Ziewiec, Artur Błachowski, Sławomir Kąc and Aneta Ziewiec
Materials 2023, 16(14), 5187; https://doi.org/10.3390/ma16145187 - 24 Jul 2023
Viewed by 996
Abstract
This research explores the welding process of a high-entropy CrMnFeCoNi alloy with iron, unraveling the intricate chemical compositions that materialize in distinct regions of the weld joint. A mid-wave infrared thermal camera was deployed to monitor the cooling sequences during welding. A thorough [...] Read more.
This research explores the welding process of a high-entropy CrMnFeCoNi alloy with iron, unraveling the intricate chemical compositions that materialize in distinct regions of the weld joint. A mid-wave infrared thermal camera was deployed to monitor the cooling sequences during welding. A thorough analysis of the metallographic sample from the weld joint, along with measurements taken using a nano-hardness indenter, provided insights into the hardness and Young’s modulus. The element distribution across the weld joint was assessed using a scanning electron microscope equipped with an EDS spectrometer. Advanced techniques such as X-ray diffraction and Mössbauer spectroscopy underscored the prevalence of the martensitic phase within the weld joint, accompanied by the presence of bcc (iron) and fcc phases. In contrast, Young’s modulus in the base metal areas displayed typical values for a high-entropy alloy (202 GPa) and iron (204 GPa). The weld joint material displayed substantial chemical heterogeneity, leading to noticeable concentration gradients of individual elements. The higher hardness noted in the weld (up to 420 HV), when compared to the base metal regions (up to 290 HV for CrMnFeCoNi alloy and approximately 150 HV for iron), can be ascribed to the dominance of the martensitic phase. These findings provide valuable insights for scenarios involving diverse welded joints containing high-entropy alloys, contributing to our understanding of materials engineering. Full article
(This article belongs to the Special Issue Structure and Properties of Crystalline and Amorphous Alloys-Part II)
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