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Metals
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Advances in Weathering Bridge Steels
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Advances in Weathering Bridge Steels

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

Deadline for manuscript submissions: closed (20 June 2024) | Viewed by 3197

Special Issue Editor

Prof. Dr. Qingfeng Wang

E-Mail Website
Guest Editor
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
Interests: high-performance steel; low-density steel; high-efficiency welding technology; Ti/Ti-Al/high-entropy alloys; metal matrix composites

Special Issue Information

Dear Colleagues,

Weathering steel (WS) is, essentially, an atmospheric-corrosion-resistant steel, usually containing no more than 0.20 wt.% carbon, 0.1-0.5 wt.% silicon and 0.8-1.5 wt.% manganese, as well as one or more other alloy elements, such as Cu, Cr, Ni and P, with a total alloy content of 1.00-5.00 wt%. WS normally uses a stable rust layer to prevent erosion, having many advantages over laborious, expensive and high-emission paintings. Hence, it is increasingly used for important applications, such as uncoated bridges, buildings, transmission towers and other load-bearing structures through welding and/or bolting. However, up till now, the discussion surrounding WS steel has been relatively extensive, but not comprehensive. It is still necessary to further explore how to obtain better corrosion resistance, weldability and fracture resistance to satisfy the requirements of various climatic environments and service conditions.

In this Special Issue, we welcome the latest feature articles discussing the use of high-performance WS for uncoated bridges, including the enhanced corrosion resistance of WS and its welded and bolted joints in humid industrial and coastal atmospheric environments, scientific methods for evaluating rust layer protection, advanced metallurgy for improving weldability and fracture protection, etc. Hence, the contents of this Special Issue could fill the present gap between designers and engineers, and enable them to have a comprehensive understanding. The overall purpose is to promote and link the fundamental research, key technology development and wide application of high-performance WS.

Prof. Dr. Qingfeng Wang
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

  • high-performance weathering steel
  • weathering steel weld
  • weathering steel bolt
  • uncoated weathering steel bridge
  • rust layer
  • corrosion resistance
  • humid industrial atmosphere
  • coastal atmosphere
  • mechanical properties
  • fracture resistance

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Published Papers (2 papers)

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Research

18 pages, 12541 KiB  
Article
Evolutions of Microstructure and Impact Toughness of Submerged Arc Weld Metal via Introducing Varied Si for Weathering Bridge Steel
by Fangmin Li, Bing Hu, Qiuming Wang, Liyang Zhao, Yuzhu Yi, Jinjian Li and Qingfeng Wang
Metals 2023, 13(9), 1506; https://doi.org/10.3390/met13091506 - 22 Aug 2023
Viewed by 1359
Abstract
In this paper, the influence of the silicon (Si) content on microstructure and impact property of submerged arc weld metals (WMs) for weathering bridge steel was clarified. Actual submerged arc welding (SAW) was carried out to produce WMs with 0.18 wt.%, 0.36 wt.%, [...] Read more.
In this paper, the influence of the silicon (Si) content on microstructure and impact property of submerged arc weld metals (WMs) for weathering bridge steel was clarified. Actual submerged arc welding (SAW) was carried out to produce WMs with 0.18 wt.%, 0.36 wt.%, 0.51 wt.%, and 0.60 wt.% of Si. The low temperature impact property of weld metal was detected, and the weld microstructures were characterized by optical microscopy (OM), scanning and transmission electron microscope (SEM and TEM), and electron backscatter diffraction (EBSD). The results indicate that WMs consist of polygon ferrite (PF), acicular ferrite (AF), granular bainitic ferrite (GBF), and martensite/austenite (M/A) constituents in each Si content. With increasing Si, the proportion of PF increased, while AF and GBF coarsened, the area fraction, fM/A, and the mean size, dM/A, of M/A constituents increased, the number of inclusions decreased, but the size increased. Further, the fraction of high-angle grain boundaries (HAGBs) with the misorientation tolerance angles (MTAs) greater than 15° reduced, while the mean equivalent diameter, MEDMTA≥15°, of ferrite grains with HAGBs increased. Accordingly, the impact toughness of WM was degraded from 108.1 J to 39.4 J with the increase in Si. The increase in M/A constituents and inclusions size reduced the critical fracture stress, thereby formation of larger microcracks and cleavage planes occurred. The reduced HAGBs exhibited a low hindering effect on crack propagation, and, consequently, the impact toughness decreased with increasing Si content. Full article
(This article belongs to the Special Issue Advances in Weathering Bridge Steels)
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18 pages, 8416 KiB  
Article
Numerical Investigation of Fatigue Crack Propagation Behaviour of 550E High-Performance Steel
by Linfa Xiao, Heng Lin, Yongxiang Wang, Yiming Yang and Huapeng Chen
Metals 2023, 13(8), 1496; https://doi.org/10.3390/met13081496 - 21 Aug 2023
Cited by 1 | Viewed by 1260
Abstract
The fatigue crack propagation behaviour of Q550E high-performance steel (HPS) is studied in this paper. Static tensile testing and fatigue crack propagation testing were carried out, and the results were compared with those of Q235. Finite element models were developed and verified against [...] Read more.
The fatigue crack propagation behaviour of Q550E high-performance steel (HPS) is studied in this paper. Static tensile testing and fatigue crack propagation testing were carried out, and the results were compared with those of Q235. Finite element models were developed and verified against the experimental results. The impacts of the initial crack angle, crack depth ratio, stress ratio, thickness, and corrosion pitting on the fatigue crack propagation behaviour of the HPS were analysed. The results show that the fatigue life of Q550 was reduced by 18% due to the corrosion pitting, but it did not change the crack propagation path. When the stress intensity factor is higher than a certain value, the fatigue performance of Q235 is better than that of Q550E. The initial crack angle of 52.5° is the critical angle of the crack stress intensity factor. The steel tends to fracture as the crack depth ratio increases, and more attention should be paid to the effective crack length in engineering practice. An increasing stress ratio leads to a smaller stress intensity factor, and the thickness affects the stress intensity factor in the later stage. The crack stress intensity factor around the corrosion pits gradually decreases along the thickness direction, and the crack tips around the corrosion pits tend to reach the yield state initially, accelerating the fatigue fracture of the specimen and ultimately leading to a decrease in fatigue life. Full article
(This article belongs to the Special Issue Advances in Weathering Bridge Steels)
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