Microstructure and Properties of High Entropy Alloy Coatings

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (20 September 2024) | Viewed by 1023

Special Issue Editor


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Guest Editor
Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan
Interests: mechanical alloying; oxide dispersion strengthened alloys; high-entropy alloys; high-temperature alloys; nuclear structural materials; friction stir welding
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Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue on “Microstructure and Properties of High Entropy Alloy Coatings”. Many coating methods can be used to improve the surface performance of alloys. The properties of coatings, such as mechanical properties and physical properties, strongly depend on their microstructure and fabrication methods. The scope of this Special Issue includes various coating techniques applied to high entropy alloys (HEAs), such as laser cladding, thermal spray coating, vapor deposition, plasma-transferred arc-cladding, and mechanical alloying. This Special Issue aims to present the recent developments in high entropy alloy coatings. Also, it focuses on the effects of oxide dispersoids on the properties of HEA coatings for elevated temperature applications.

In particular, the topics of interest include, but are not limited to, the following:

  • High entropy superalloy coatings;
  • Eutectic high entropy alloy coatings;
  • Refectory high entropy alloy coatings;
  • Lightweight high entropy alloy coatings.

Prof. Dr. Chun-Liang Chen
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. 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

  • high entropy alloy coatings
  • microstructure chrateraistion
  • mechanical properties
  • oxide dispersion strengthening

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Published Papers (1 paper)

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Research

12 pages, 10523 KiB  
Article
Investigations of Oxide Dispersoids and Annealing on Characteristics of AlCoCrFeNi2.1 Coatings and Bulks Prepared by Mechanical Alloying
by Chun-Liang Chen and Fang-Yu Huang
Coatings 2024, 14(4), 442; https://doi.org/10.3390/coatings14040442 - 8 Apr 2024
Viewed by 697
Abstract
Eutectic high-entropy alloy (EHEA) has an outstanding combination of high strength and excellent ductility due to its dual-phase structure. In this study, AlCoCrFeNi2.1 coatings on stainless steel substrates and bulk AlCoCrFeNi2.1 alloys were prepared by mechanical alloying (MA). The results show [...] Read more.
Eutectic high-entropy alloy (EHEA) has an outstanding combination of high strength and excellent ductility due to its dual-phase structure. In this study, AlCoCrFeNi2.1 coatings on stainless steel substrates and bulk AlCoCrFeNi2.1 alloys were prepared by mechanical alloying (MA). The results show that EHEA coatings with a dual-phase microstructure of BCC-AlNi/FCC-CoCrFe were obtained. A long milling duration promotes a uniform microstructure and homogeneous distribution of composition in the EHEA coatings, increasing hardness. Furthermore, annealing treatment encourages the formation of Cr-rich phases and Al-rich oxides, which affect the mechanical properties of coatings and bulk materials. Additionally, the presence of oxide dispersoids can cause the embrittlement of materials due to the formation of Al-Y-O oxide pores, resulting in the degradation of the mechanical properties of materials. Full article
(This article belongs to the Special Issue Microstructure and Properties of High Entropy Alloy Coatings)
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