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Advanced Ferrous Metallurgy and High-Entropy Alloys

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: 20 April 2024 | Viewed by 1832

Special Issue Editor

School of Metallurgy, Northeastern University, Shenyang 110819, China
Interests: high nitrogen steels; stainless steels; special steels; high-entropy alloys; pressurized metallurgy; inclusion; cleanliness; strength ductility; corrosion; passive film

Special Issue Information

Dear Colleagues,

As a new type of alloy system breaking through the traditional design concept, high-entropy alloys (HEAs) have aroused great attention due to their complex microstructural features with exceptional thermal stability and mechanical properties even at cryogenic temperatures. The continuous development of ferrous metallurgy technologies significantly promotes the progress of steels and HEAs. In addition, the urgent need of carbon emission reduction also puts forward higher request to ferrous metallurgy. The main goal of the Special Issue is to highlight original research articles and review papers that concern the recent developments of advanced ferrous metallurgy and HEAs.

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

(i) new ferrous metallurgical technology used to manufacture special steels and HEAs with high cleanliness, high homogeneity and high performance;

(ii) hydrogen metallurgy and low-carbon metallurgy;

(iii) the effect of new metallurgical technologies on the performance of steels and HEAs;

(iv) the alloy design of special steels and HEAs;

(v) the microstructure, strength, ductility and corrosion behaviour of steels and HEAs; (vi) machine learning in ferrous metallurgy.

Dr. Hao Feng
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

  • ferrous metallurgy
  • special steels
  • high-entropy alloys
  • hydrogen metallurgy
  • refining and solidification
  • alloy design
  • machine learning
  • microstructure evolution
  • strength ductility
  • corrosion behaviour

Published Papers (2 papers)

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Research

15 pages, 19820 KiB  
Article
Utilization of High-Zn Content Ferrous Landfill Sludge with the Use of Hydrogen
by Mikolaj Bernasowski, Piotr Migas, Marta Ślęzak, Łukasz Gondek and Łukasz Cieniek
Materials 2023, 16(24), 7676; https://doi.org/10.3390/ma16247676 - 16 Dec 2023
Cited by 1 | Viewed by 707
Abstract
Sludge, due to its form and significant moisture and zinc content, is the most problematic metallurgical waste. Near the site of a disused steelworks plant in Krakow (Poland) there is an estimated 5 million tonnes of landfill sludge that consists of more than [...] Read more.
Sludge, due to its form and significant moisture and zinc content, is the most problematic metallurgical waste. Near the site of a disused steelworks plant in Krakow (Poland) there is an estimated 5 million tonnes of landfill sludge that consists of more than 90% iron and other metal oxides. There is a global tendency to switch steel production towards carbonless technologies, which is why the presented work investigates the possibility of simultaneous waste liquidation and recovery of valuable metals with the use of hydrogenous reduction. Direct reduced iron (DRI) production was selected as the targeted technology, so the sludge was lumped and bound with cement or CaO addition. The obtained lumps were reduced in a hydrogenous atmosphere with gradual heating to 950 °C, after which their phase structure was analyzed and elemental analysis was performed. It was found that zinc evaporated during the experiment, but mostly thanks to the carbon contained in the sludge. The increased addition of binder to the sludge resulted in the enhancement of the lumps, but also limited the reduction range. The products obtained were mostly wustite and less pure iron. Taking into account the degree of reduction and the lumps’ compression strength, the best binding was achieved by adding cement at a quantity of 5% mass. Full article
(This article belongs to the Special Issue Advanced Ferrous Metallurgy and High-Entropy Alloys)
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13 pages, 6969 KiB  
Article
Study on the Influences of Adding Rare Earth Ce on the Precipitation Behaviors of TiN Inclusions in 20CrMnTi
by Jian Wang, Jun Peng, Lixia Liu, Fang Zhang, Jihua Peng, Hao Tang, Jie Zheng and Shengli An
Materials 2023, 16(16), 5598; https://doi.org/10.3390/ma16165598 - 12 Aug 2023
Cited by 4 | Viewed by 705
Abstract
The morphologies and sizes of TiN inclusions in gear steel 20CrMnTi have a significant impact on its service performance. This paper selects rare earth Ce to modify TiN inclusions in 20CrMnTi. The inclusions are analyzed by SEM (scanning electron microscope), EBSD (electron back-scattered [...] Read more.
The morphologies and sizes of TiN inclusions in gear steel 20CrMnTi have a significant impact on its service performance. This paper selects rare earth Ce to modify TiN inclusions in 20CrMnTi. The inclusions are analyzed by SEM (scanning electron microscope), EBSD (electron back-scattered diffraction), EDS (energy disperse spectroscopy), and OTS statistical software, and Thermo-Calc software is used to calculate the inclusion formations. The inclusions of MgAlO4-Ce and CeAlO3 can be formed when rare earth Ce is added into 20CrMnTi, which becomes TiN nucleation core after precipitation. Without the addition of rare earth Ce, square TiN inclusions ranging from 2 to 5 μm account for 60% of the total inclusions in 20CrMnTi. After adding rare earth Ce, the TiN inclusions in 20CrMnTiCe account for 36.7% of the total inclusions. Due to the new phase formations of MgAlO4-TiN and CeAlO3-TiN with sizes less than 2 μm, the titanium-containing inclusions are refined. Fatigue tests are conducted on the steels before and after the addition of Ce. The average fatigue lives of 20CrMnTi do not reach 107 times, and the deviations between the maximum and minimum fatigue lives are great. Large-sized TiN are the main inclusions that affect the fatigue performance of 20CrMnTi. The average fatigue lives of 20CrMnTiCe exceed 107 times, and the deviations of the fatigue lives are smaller than those of 20CrMnTi. Full article
(This article belongs to the Special Issue Advanced Ferrous Metallurgy and High-Entropy Alloys)
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