Surface Strengthening of Engineering Materials

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 (30 April 2023) | Viewed by 4442

Special Issue Editors


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Guest Editor
School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China
Interests: high-performance steel; surface engineering; advanced manufacturing; bearing steel
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Materials Science & Engineering, Standford University, Stanford, CA 94305, USA
Interests: fracture mechanics; mechanical characterization

Special Issue Information

Dear Colleagues,

The surface condition of engineering materials plays an important role in their physical and/or chemical properties, such as fatigue, wear, biocompatibility, and corrosion. In recent years, surface strengthening of engineering materials has rapidly expanded as the demand for improved materials has increased. The commonly used surface strengthening techniques can be categorized into chemical or physical methods, such as nitriding, carburizing, shot peening, ion implanting, and laser peening. The surface properties of engineering material can be strengthened or improved by modifying its surface chemical composition, generating heterogeneous nano-grained structure, and/or introducing high-level residual compressive stress. In this Special Issue, we will be focusing on the surface strengthening of engineering materials used in transportation, aerospace, nuclear engineering, etc., which could benefit scientists and engineers in the related research fields.

The Special Issue scope embraces the fundamental understanding, advanced characterization and/or modeling, and technical applications of surface strengthening on engineering materials (ceramics, metals, alloys, polymers, and composites). Correspondingly, we intend to solicit research and review articles that cover a wide range of recent progress in the interdisciplinary field of developing surface strengthening techniques, including fundamental physics, technical innovations, characterizations of materials properties, the roles of defects of various kinds on their materials properties, their mechanical, electrical, and biomedical applications, and their scale-up. Articles on theoretical, computational, and experimental studies are equally welcome.

Topics of interest include but are not limited to the following areas:

  • Fundamental understanding of strengthening mechanisms;
  • Innovation in surface strengthening techniques;
  • Modeling and/or measurement of materials properties;
  • Mechanical, thermal, chemical, and biological applications;
  • Scale-up and commercialization.

Prof. Dr. Fei Yin
Dr. Rong Xu
Guest Editors

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Keywords

  • surface strengthening
  • engineering materials
  • mechanical strength
  • metal forming
  • wear
  • fatigue
  • corrosion
  • alloy design

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Published Papers (2 papers)

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Research

9 pages, 8913 KiB  
Article
Effect of the Pre-Shot Peening and Nitrogen Ion Implantation Combined Surface Treatments on the Surface Structure and Properties of Gear Steel 16Cr3NiWMoVNbE
by Chunling Xu, Xin Wang, Bin Zhang, Xuekun Luo, Zhihui Tang and Shenglong Dai
Metals 2022, 12(9), 1509; https://doi.org/10.3390/met12091509 - 13 Sep 2022
Cited by 8 | Viewed by 1737
Abstract
Transmission engineering components need to fulfill requirements for adequate wear resistance and fatigue resistance, which are related to their surface properties. In this paper, we combined shot peening and nitrogen ion implantation to improve the surface properties of 16Cr3NiWMoVNbE gear steel. The average [...] Read more.
Transmission engineering components need to fulfill requirements for adequate wear resistance and fatigue resistance, which are related to their surface properties. In this paper, we combined shot peening and nitrogen ion implantation to improve the surface properties of 16Cr3NiWMoVNbE gear steel. The average surface roughness decreased slightly after the ion implantation because of the high-speed impact of implanted ions having the surface etching role. The maximum compressive residual stress of the near-surface layer after the surface treatment increased by more than 11.8–15.9% compared with shot peening. The nitrogen ions diffused through the peening deformation channel, and the deformation degree and the implantation temperature were positively correlated with the diffusion process. The surface nano-hardness obtained by ion implantation after shot peening was increased by 124.4% compared to the AR state. Full article
(This article belongs to the Special Issue Surface Strengthening of Engineering Materials)
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14 pages, 42913 KiB  
Article
Effects of Cooling Rate on the Solidification Process of Pure Metal Al: Molecular Dynamics Simulations Based on the MFPT Method
by Xiaohua Chen, Weijie Fan, Wenwen Jiang, Deye Lin, Zidong Wang, Xidong Hui and Yanlin Wang
Metals 2022, 12(9), 1504; https://doi.org/10.3390/met12091504 - 11 Sep 2022
Cited by 4 | Viewed by 2693
Abstract
Isothermal solidification process of pure metal Al was studied by molecular dynamics (MD) simulation using EAM potential. The effects of different cooling rates on the isothermal solidification process of metallic Al were studied. Al was first subjected to a rapid cooling process, and [...] Read more.
Isothermal solidification process of pure metal Al was studied by molecular dynamics (MD) simulation using EAM potential. The effects of different cooling rates on the isothermal solidification process of metallic Al were studied. Al was first subjected to a rapid cooling process, and then it was annealing under isothermal conditions. The mean first-passage times (MFPT) method and Johnson-Mehl-Avrami (JMA) law were used to qualify the solidification kinetic processing, and the nucleation rate, critical nucleus size, Avrami exponent and growth exponent of grains were calculated. Results show that the nucleation rate and critical size decrease as the cooling rate increases. Also, an increase in the cooling rate leads to the increase of grain growth rate. At all investigated cooling rates, nucleation and growth processes are in the typical three-dimensional growth mode. Full article
(This article belongs to the Special Issue Surface Strengthening of Engineering Materials)
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