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Metals
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Metallic Materials Behaviour Under Applied Load
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Metallic Materials Behaviour Under Applied Load

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Crystallography and Applications of Metallic Materials".

Deadline for manuscript submissions: 30 December 2025 | Viewed by 637

Special Issue Editors

Dr. Zhiping Xiong

E-Mail Website
Guest Editor
School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, China
Interests: steels; high entropy alloys; fracture mechanism; strengthening mechanism; fracture toughness; phase transformation
Prof. Dr. Elena Pereloma

E-Mail Website
Guest Editor
School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
Interests: physical metallurgy; steels; phase transformations; Ti alloys; atom probe tomography; mechanical behaviour; recrystallization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue, titlted "Metallic Materials Behaviour Under Applied Load", focuses on how metals respond to external forces. When a load is applied, metallic materials can exhibit different behaviors. Elastic deformation occurs initially, where the material stretches or compresses and then returns to its original shape once the load is removed. However, as the load increases, plastic deformation may take place, resulting in permanent changes in shape. The accommodation mechanisms of plastic deformation (slip, twinning, phase transformations), which are determined by alloy composition and crystal structure, affect the properties of metals and alloys, such as tensile strength, yield strength, and ductility. External factors (for example, temperature and strain rate) also influence how metals respond to the applied loads. Studying this topic is essential for engineering applications to ensure the reliability and safety of structures made of metallic materials.

Dr. Zhiping Xiong
Prof. Dr. Elena Pereloma
Guest Editors

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

  • deformation
  • strengthening mechanism
  • TRIP effect
  • TWIP effect
  • fracture mechanism
  • toughness
  • ductility
  • heterogeneous microstructure
  • brittle fracture
  • phase transformation

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Published Papers (1 paper)

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Research

15 pages, 5025 KiB  
Article
Impact of High Contact Stress on the Wear Behavior of U75VH Heat-Treated Rail Steels Applied for Turnouts
by Ruimin Wang, Guanghui Chen, Nuoteng Xu, Linyu Sun, Junhui Wu and Guang Xu
Metals 2025, 15(6), 676; https://doi.org/10.3390/met15060676 - 18 Jun 2025
Viewed by 292
Abstract
Considering the greater contact stress of turnout rails during wear and the development of heavy-haul railways, twin-disc sliding–rolling wear tests were performed on U75VH heat-treated rail steels applied for turnouts under high contact stress ranging from 1980 MPa to 2270 MPa. The microstructure [...] Read more.
Considering the greater contact stress of turnout rails during wear and the development of heavy-haul railways, twin-disc sliding–rolling wear tests were performed on U75VH heat-treated rail steels applied for turnouts under high contact stress ranging from 1980 MPa to 2270 MPa. The microstructure of the worn surfaces was analyzed using optical microscope (OM), scanning electron microscope (SEM), 3D microscope, electron backscatter diffraction (EBSD), and hardness tests. The results indicated that after 10 h of wear, the weight loss was 63 mg at a contact stress of 1980 MPa, while it reached 95 mg at a contact stress of 2270 MPa. At a given contact stress, the wear rate increased with increasing wear time, while a nearly linear increase in wear rate was observed with increasing contact stress. As wear time and contact stress increased, the worn surface showed more pronounced wear morphology, leading to greater surface roughness. Crack length significantly increased with wear time, and higher contact stress facilitated crack propagation, resulting in longer, deeper cracks. After 10 h of wear under a contact stress of 2270 MPa, large-scale cracks with a maximum length of 128.29 μm and a maximum depth of 31.10 μm were formed, indicating severe fatigue wear. Additionally, the thickness of the plastic deformation layer increased with the wear time and contact stress. The surface hardness was dependent on the thickness of this layer. After 10 h of wear under the minimum and maximum contact stresses, hardening rates of 0.39 and 0.48 were achieved, respectively. Full article
(This article belongs to the Special Issue Metallic Materials Behaviour Under Applied Load)
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