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Microstructure and Mechanical Properties Analysis of Metallic Structural Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 April 2023) | Viewed by 3900

Special Issue Editors

Faculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
Interests: metallic nanomaterials; cermets; mechanical properties; wear of materials; computational materials science
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 0631200, China
Interests: advanced high-strength steels; phase transformations; mechanical behaviors; microstructure characterization; synchrotron radiation; heat treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metallic structural materials have wide applications in automobiles, high-speed air or ground transportation, clean energy, or more advanced space exploration techniques. Designing and developing metallic structural materials for today’s modern society demands a comprehensive understanding of the complex relationships among processing, microstructures and mechanical properties. Modern research significantly engages in engineering microstructures in order to improve their mechanical properties. The strengthening of mechanisms that contribute to mechanical properties can originate from very different length scales in microstructural features. It is very important to unveil their interactions in their intrinsic state. Advanced materials characterization and simulation techniques provide opportunities for obtaining such detailed microstructure information from the micro- to nanoscale. Investigating the evolution of microstructures and tailoring their mechanical properties is of great significance for promoting the development and application of metallic structural materials.

This Special Issue aims to cover recent advances and new developments in the relationships between the microstructure and mechanical properties of conventional and advanced metallic structural materials. The articles presented in this Special Issue will focus on, but are not limited to, the following topics: metallic materials design, materials processing, advanced characterization techniques, mechanical properties, and strengthening and deformation mechanisms.

We kindly invite you to submit a manuscript for publication in this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Hao Lu
Dr. Minghe Zhang
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. Materials is an international peer-reviewed open access semimonthly 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

  • metallic materials design
  • materials processing
  • advanced characterization techniques
  • phase transformation
  • mechanical properties
  • strengthening and deformation mechanisms
  • theoretical model
  • calculation and simulation methods
  • data-driven materials design

Published Papers (2 papers)

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Research

24 pages, 29781 KiB  
Article
Microstructure and Mechanical Properties of Y4Zr3O12-Added Fe–13.5Cr–2W Oxide-Dispersion-Strengthened Steels, Containing High Contents of C and N, Prepared by Mechanical Alloying and Two-Step Spark Plasma Sintering
by Yiheng Wu, Qunying Huang, Ligang Zhang, Yong Jiang, Gaofan Zhu and Jingjie Shen
Materials 2023, 16(6), 2433; https://doi.org/10.3390/ma16062433 - 18 Mar 2023
Viewed by 1676
Abstract
Oxide-dispersion-strengthened (ODS) steel is considered as a promising candidate structural material for nuclear applications. In this study, the microstructure and mechanical properties of Y4Zr3O12-added Fe–13.5Cr–2W ODS steels, containing high contents of C and N, prepared by mechanical [...] Read more.
Oxide-dispersion-strengthened (ODS) steel is considered as a promising candidate structural material for nuclear applications. In this study, the microstructure and mechanical properties of Y4Zr3O12-added Fe–13.5Cr–2W ODS steels, containing high contents of C and N, prepared by mechanical alloying (MA) and two-step spark plasma sintering (SPS), were investigated. The results showed that pure Y4Zr3O12 powders, with a grain size of 3.5 nm, were well prepared with NH3·H2O addition by the sol-gel method in advance, in order to avoid the formation of some coarse or undesired oxides. W was completely dissolved into the matrix after 48 h of ball milling at 300 rpm, and the main elements were uniformly distributed on the surface of the milled powders. The unexpected face-centered cubic (FCC, γ)/body-centered cubic (BCC, α) dual-phase structure of the sintered specimens, could be explained by the unexpectedly high contents of C and N from the raw powder production process, fast-sintering characteristic of SPS, and inhibitory effect of W on the diffusion of C. The experimental results were approximately consistent with the simulation results from the Thermo Calc software. The temperature combination of 800 °C and 1100 °C during the SPS process, provided a relatively more homogeneous microstructure, while the combination of 750 °C and 1150 °C, provided the highest ultimate tensile strength (UTS), of 1038 MPa, with the highest uniform elongation (UE), of 6.2%. M23C6, Cr2O3, M2(C,N), and other precipitates, were mainly distributed at grain boundaries, especially at the triple junctions, which led to Cr depletion at grain boundaries. Full article
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14 pages, 5080 KiB  
Article
Microstructure Evolution and Mechanical Properties of Ferrite–Austenite Duplex Fe-Mn-Al-(Cu)-C Steel under Different Annealing Temperatures
by Xiang Yan, Yiming Wu, Minghe Zhang, Songsong Liu, Lihui Sun and Yunli Feng
Materials 2022, 15(22), 8271; https://doi.org/10.3390/ma15228271 - 21 Nov 2022
Cited by 3 | Viewed by 1395
Abstract
The effect of Cu addition and the intercritical annealing (IA) temperature on the microstructural evolution and mechanical properties of Fe-0.4C-7Mn-4Al (wt%) was investigated via scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD) and nanoindentation tests. The results showed that the [...] Read more.
The effect of Cu addition and the intercritical annealing (IA) temperature on the microstructural evolution and mechanical properties of Fe-0.4C-7Mn-4Al (wt%) was investigated via scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD) and nanoindentation tests. The results showed that the volume fraction and the average grain size of austenite, and the fraction of high angle grain boundaries, increased with IA temperature increase in the range of 650 °C to 710 °C. The addition of Cu facilitates the formation of Cu-rich nanoparticles, raises the volume fraction of austenite, and delays the recrystallization of austenite. As IA temperature increased, the yield strength (YS), ultimate tensile strength (UTS), and Lüders bands strain (LBS) decreased in both experimental steels. The Cu addition not only increases the YS of medium Mn steel but also benefits the decrease of LBS. The best comprehensive mechanical properties were obtained at the IA temperature of 690 °C in the studied steel, with Cu addition. According to nanoindentation experiments, the Cu addition raises the hardness of ferrite and austenite from 4.7 GPa to 6.3 GPa and 7.4 GPa to 8.5 GPa, respectively, contributing to the increase of YS of medium-Mn steel. Full article
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