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Metals
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Advances in Carbides of Steels: Experiment and Modeling
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Advances in Carbides of Steels: Experiment and Modeling

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 6171

Special Issue Editor

Dr. David Rojas

E-Mail Website
Guest Editor
Materials Engineering Department, Universidad de Concepción, 4070409 Biobio, Chile
Interests: carbides; thermodynamic calculations; secondary hardening; growth and coarsening; kinetic modelling; evolution of microstructure

Special Issue Information

Dear Colleagues,

Special steels are frequently designed with the addition of a small number of chemical elements that improve mechanical properties, such as strength, toughness, creep resistance, abrasion resistance, among others. These unique properties are given by carbides precipitation after the tempering process, called secondary hardness. Carbides are chemical compounds where carbon is combined with a metallic or semimetallic element with lower electronegativity. To improve mechanical properties by carbide precipitation, the size, the separation between them, thermodynamic stability, and kinetics of growing and coarsening must be adequate. Nowadays, thermodynamic and kinetic modeling are very reliable tools to predict the carbides behaviour related to the evolution of these phases on the exceptional properties of these kinds of steels. In this Special Issue, authors are most welcome to provide the latest experimental and modeling results on this fascinating topic of the physical metallurgy applied to the design and characterization of special steels. This includes fundamental questions regarding carbide growth, coarsening and stability, and secondary hardening improvement in mechanical properties.

Dr. David Rojas
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

  • carbide precipitation
  • carbide evolution
  • carbide growth
  • carbon migration
  • coarsening
  • heat treatment of steels
  • physical metallurgy of steels
  • design and mechanical properties of steels

Published Papers (2 papers)

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Research

11 pages, 3242 KiB  
Article
Effect of Solution Treatment Temperature on Microstructure and Properties of Fe-0.72Mn-3.7Al-0.53C Low-Density Cast Steel
by Nan Song, Weimin Zhao, Lishan Dong and Xinshan Zhou
Metals 2022, 12(8), 1290; https://doi.org/10.3390/met12081290 - 30 Jul 2022
Viewed by 1340
Abstract
In the present research, the microstructure and mechanical properties of low-density Fe-0.72Mn-3.7Al-0.53C steel were investigated after solution treatment at 900 °C, 1000 °C, 1110 °C and 1200 °C for 1 h. The density of steel is about 7.0 g·cm−3 due to the [...] Read more.
In the present research, the microstructure and mechanical properties of low-density Fe-0.72Mn-3.7Al-0.53C steel were investigated after solution treatment at 900 °C, 1000 °C, 1110 °C and 1200 °C for 1 h. The density of steel is about 7.0 g·cm−3 due to the addition of a higher content of aluminum elements. The microstructure was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the mechanical behavior was analyzed by room temperature tensile testing. The results show that the microstructure of the steel is ferrite and martensite after solution treatment, and that martensite can be divided into dislocation martensite and twinned martensite according to different substructures. Part of the martensite grows in a mirror-symmetrical manner in order to adjust the strain energy that increases with the system undercooling to form twinned martensite. After solution treatment at different temperatures, the tensile strength and elongation of the steel increased and then decreased with the increase of the solution treatment temperature, and the tensile strength could reach 928.92 MPa, while maintaining excellent toughness and elongation at 5.89%. Full article
(This article belongs to the Special Issue Advances in Carbides of Steels: Experiment and Modeling)
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16 pages, 9134 KiB  
Article
Effects of Quenching and Tempering Heat Treatment Processing on the Microstructure and Properties of High-Strength Hull Steel
by Hongmei Zhang, Mingshuai Huo, Zhiqiang Ma, Hui Wu, Guanqiao Su, Lianjie Li, Tao Zhang, Fei Lin, Fenghua Chen and Zhengyi Jiang
Metals 2022, 12(6), 914; https://doi.org/10.3390/met12060914 - 26 May 2022
Cited by 4 | Viewed by 4288
Abstract
The construction of heavy polar icebreakers is usually done with special hull steels, which require comprehensive properties such as good low-temperature toughness, high strength, and superior fatigue resistance. Reasonable and satisfactory heat treatments should be investigated and applied to acquire the required high [...] Read more.
The construction of heavy polar icebreakers is usually done with special hull steels, which require comprehensive properties such as good low-temperature toughness, high strength, and superior fatigue resistance. Reasonable and satisfactory heat treatments should be investigated and applied to acquire the required high strength and superior low-temperature toughness, since this is deemed an effective approach to ameliorate the combined properties of high-strength hull steels. Regarding this, the present study specifically explores the effects of different laboratory-based quenching (850 to 930 °C) and tempering (580 to 660 °C) heat treatments on the final low-temperature toughness of the high-strength hull steels. The low-temperature toughness is eventually improved without significantly sacrificing the strength. The results show that a favourable combination of properties can be obtained in the specimens under 900 °C quenching and 660 °C tempering processes. Additionality, the specimens tempered at 620 °C present the highest hardness, owing to the higher percentage of tempered martensite. Detailed mechanisms of the enhanced properties of the typical specimens subjected to the corresponding quenching and tempering processing are analysed and explicated. Full article
(This article belongs to the Special Issue Advances in Carbides of Steels: Experiment and Modeling)
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