Special Issue "Advances in Microalloyed Steels"

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 31 July 2018

Special Issue Editor

Guest Editor
Assoc. Prof. Pello Uranga

1. Associate Director of the Materials and Manufacturing Division at CEIT
2. Associate Professor at Tecnun-School of Engineering (Univ. of Navarra). CEIT and Tecnun (University of Navarra), M. Lardizabal 15, 20018 Donostia-San Sebastian, Basque Country, Spain
Website | E-Mail
Interests: Phase Transformations; Microstructure; Microscopy; Microalloying; Steels; Metallurgy; Materials Science; Modelling

Special Issue Information

Dear Colleagues,

In response to the demanding requirements of different sectors, such as construction, transportation, energy, manufacturing, and mining, new generations of microalloyed steels are being developed and brought to market. The addition of microalloying elements, such as Niobium, Vanadium, Titanium, Boron and/or Molybdenum have become a key tool in the steel industry to reach economically-viable grades with increasingly higher mechanical strengths, toughness properties, good formability and weldable products.

The challenges that microalloying steel production face can be successfully solved with a deeper understanding of the effects that these microalloying additions and combinations of them have during the different steps of the steelmaking process. Their influence in softening mechanisms, such as recrystallization and grain growth during hot working, precipitation kinetics, phase transformation during cooling, and the relationship between the final microstructure and mechanical properties are just some examples of subjects of interest for research in industry and academia.

The availability of advanced characterization techniques together with innovative modelling strategies provides new tools to understand these open issues and achieve valid answers for the development of new microalloyed grades and the optimization of the processing routes.

For this Special Issue on "Advances in Microalloyed Steels", I would like to invite researchers from steel industry and academia to submit their latest developments and achievements in this field.

Assoc. Prof. Pello Uranga
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 papers will be 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 1000 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

  • Niobium
  • Vanadium
  • Titanium
  • Boron
  • Molybdenum
  • Thermomechanical Processing
  • Phase Transformations
  • Microstructure
  • Mechanical Properties
  • Modelling

Published Papers (1 paper)

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Research

Open AccessArticle The Influence of La and Ce Addition on Inclusion Modification in Cast Niobium Microalloyed Steels
Metals 2017, 7(9), 377; doi:10.3390/met7090377
Received: 7 August 2017 / Revised: 28 August 2017 / Accepted: 29 August 2017 / Published: 15 September 2017
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Abstract
The main role of Rare Earth (RE) elements in the steelmaking industry is to affect the nature of inclusions (composition, geometry, size and volume fraction), which can potentially lead to the improvement of some mechanical properties such as the toughness in steels. In
[...] Read more.
The main role of Rare Earth (RE) elements in the steelmaking industry is to affect the nature of inclusions (composition, geometry, size and volume fraction), which can potentially lead to the improvement of some mechanical properties such as the toughness in steels. In this study, different amounts of RE were added to a niobium microalloyed steel in as-cast condition to investigate its influence on: (i) type of inclusions and (ii) precipitation of niobium carbides. The characterization of the microstructure by optical, scanning and transmission electron microscopy shows that: (1) the addition of RE elements change the inclusion formation route during solidification; RE > 200 ppm promote formation of complex inclusions with a (La,Ce)(S,O) matrix instead of Al2O3-MnS inclusions; (2) the roundness of inclusions increases with RE, whereas more than 200 ppm addition would increase the area fraction and size of the inclusions; (3) it was found that the presence of MnS in the base and low RE-added steel provide nucleation sites for the precipitation of coarse niobium carbides and/or carbonitrides at the matrix–MnS interface. Thermodynamic calculations show that temperatures of the order of 1200 °C would be necessary to dissolve these coarse Nb-rich carbides so as to reprecipitate them as nanoparticles in the matrix. Full article
(This article belongs to the Special Issue Advances in Microalloyed Steels)
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