Microstructure and Mechanical Properties of Metallic Materials 2023

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Metals and Alloys".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 2226

Special Issue Editors

School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: explosive welding; explosive consolidation; explosion hardening; 3D printing; mechanism behavior; microstructure; high-entropy alloy
School of Materials Science and Engineering, Shandong University, Jinan 250100, China
Interests: explosive welding; explosive consolidation; explosion hardening; 3D printing; mechanism behavior; metallic materials

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Guest Editor
Department of Mechanics, College of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: ballistic impact behavior of structures; gradient nanostructured materials; explosive welding
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 212013, China
Interests: explosive welding; explosive consolidation; explosion hardening; 3D printing; mechanism behavior; metallic materials; high-entropy alloy

Special Issue Information

Dear Colleagues,

With the development of science and technology, many emerging technologies are being used to synthesize new metal materials such as high-entropy alloys, metallic laminated composites, nanostructures materials, 3D-printed structures, metal-based energetic structural materials etc. Due to the differences in the properties of different metallic materials, the microstructural and mechanical properties must be evaluated to determine whether the materials can be applied in nuclear fusion, aerospace, mechanical, electronic and petrochemical industry, bridges, weaponry, warheads, fragments etc. Indeed, the microstructure of metallic materials has a crucial effect on their mechanical properties, such as phase-transformation strengthening, dislocation strengthening, grain-boundary strengthening, grain refinement and composition and the proportion of elements, which can be used to achieve high strength/hardness and determine the application of the metallic material. Through preparation techniques such as explosive welding, explosive consolidation, explosion hardening, 3D printing, rolling, hot isostatic pressing sintering, high-entropy alloying etc., metallic materials with various microstructures can be obtained. Achieving metal materials with a range of targeted microstructure and mechanical properties is crucial in order to expand their application field.

The aim of this Special Issue is to highlight the preparation, characterization, microstructure, mechanical properties, and applications of metallic materials, metallic composites and nanocomposites. We hope that the Issue will compile the current state of the art of metallic materials and highlight the range of applications of these metal composites and nanostructures (explosive welding, explosive hardening, 3D printing, explosive consolidation, energetic structural materials etc.).

Potential topics include, but are not limited to:

  • Design and preparation of metallic materials and metallic composites;
  • Microstructure characterization and mechanical properties of steels, high-entropy alloys, aluminum alloys, titanium and magnesium alloys, metallic laminated composites and nanostructured materials; impact initiation and reaction behavior of energetic structural materials etc.;
  • EBSD, TEM, EDS, SEM, XRD, DSC and APT;
  • Strengthening and deformation failure mechanisms.

We invite you to submit a manuscript for this Special Issue. Original research articles, perspectives and reviews are welcome.

Dr. Qiang Zhou
Dr. Xinde Zhu
Dr. Bin Jia
Dr. Wenjie Zhao
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. Crystals 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

  • explosive welding
  • explosive consolidation
  • explosion hardening
  • 3D printing
  • metallic materials
  • microstructure characterization
  • welding
  • mechanical properties
  • light metal alloys
  • steel
  • titanium
  • aluminum
  • magnesium
  • composites
  • nanocomposites
  • thermomechanical treatment

Published Papers (2 papers)

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Research

14 pages, 20355 KiB  
Article
Study on the Microstructure and Mechanical Properties of Martensitic Wear-Resistant Steel
by Shaoning Jiang, Shoushuai Zhang, Jianghai Lin, Xiaoyu Zhu, Sensen Li, Yu Sun, Yuhai Xia, Wenjun Liu and Chaofeng Wang
Crystals 2023, 13(8), 1210; https://doi.org/10.3390/cryst13081210 - 04 Aug 2023
Cited by 1 | Viewed by 909
Abstract
In order to improve the overall performance of edge plates such as bulldozer blades, composition and heat treatment processes were optimized on the martensitic wear-resistant steel grade 400 HB. Steel billets were first obtained through smelting in a state of hot rolling, followed [...] Read more.
In order to improve the overall performance of edge plates such as bulldozer blades, composition and heat treatment processes were optimized on the martensitic wear-resistant steel grade 400 HB. Steel billets were first obtained through smelting in a state of hot rolling, followed by quenching and tempering to obtained wear-resistant steel (HB400). Then, HB400 was subjected to metallographic observation, electron backscatter diffraction (EBSD) testing, and transmission electron microscope (TEM) characterization and property testing. The results showed that HB400 exhibited microstructural refinement, characterized by narrower martensite laths and finer grains. The EBSD results indicated a uniform microstructure with a low content of the residual austenite (0.5%), indicating good hardenability. TEM observation of the martensite matrix revealed the presence of substructures, i.e., numerous dislocations in martensite laths. The average Rockwell hardness (HRC) of HB400 was 46.3, and the average Brinell hardness (HB) was 402. A mechanical properties test demonstrated comprehensive properties, which showed that the ultimate tensile strength and yield strength of HB400 were 1495 MPa and 1345 MPa, respectively, with a relative elongation of 12%. Friction and wear experiments showed that the friction coefficient and wear rate in reciprocating mode decreased by 16.1% and 45.4%, respectively, while in rotating mode, they decreased by 27.6% and 2.1%, respectively, as the load increased from 100N to 300N. According to the wear morphology, the main wear mechanisms were identified as adhesive wear, abrasive wear, and oxidative wear. The lubricating effect of the oxide layer generated by wear was identified as the primary reason for the reduction in the friction coefficient. The relationship between microstructures and properties was discussed based on grain refinement strengthening and dislocation strengthening. Full article
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Metallic Materials 2023)
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10 pages, 4871 KiB  
Article
Microstructural Evolution and Deformation Behavior of a Solution-Treated Ti-Al-Mo-Fe Metastable Beta Titanium Alloy during Room-Temperature Deformation
by Wei Tang, Xiaobin Zhang, Chuankui Yu, Linlang Wu, Han Zhang and Chenglin Li
Crystals 2023, 13(5), 818; https://doi.org/10.3390/cryst13050818 - 15 May 2023
Viewed by 1085
Abstract
Beta titanium (β-Ti) alloys have been widely used in aerospace and biomedical implants due to their specific strengths, low elastic modulus, and their resistance to corrosion. As β titanium alloy is a novel metastable, Ti-2Al-9.2Mo-2Fe (wt.%) alloy is essential to understand microstructural evolution [...] Read more.
Beta titanium (β-Ti) alloys have been widely used in aerospace and biomedical implants due to their specific strengths, low elastic modulus, and their resistance to corrosion. As β titanium alloy is a novel metastable, Ti-2Al-9.2Mo-2Fe (wt.%) alloy is essential to understand microstructural evolution and deformation behavior at room temperature to improve the strength–ductility balance. The deformation behavior and microstructural evolution of the Ti-2Al-9.2Mo-2Fe alloy during room-temperature deformation has been investigated via electron backscatter diffraction (EBSD) and electron channeling contrast imaging (ECCI). It was found that the β-solution-treated alloy exhibited a single β phase with a lower β stability. However, the α/β-solution-treated alloy exhibited a layered structure, consisting of fine α + β grain layers and coarse β grain layers, and the β in the coarse grain layer had a lower stability, but the β in the fine grain layer had a higher stability owing to the coexistence of α. The β-solution-treated alloy was mainly deformed via {332}<113> deformation twinning, thus showing very high ductility; uniform elongation of approximately 35%. The α/β-solution-treated alloy was deformed via two mechanisms, namely {332}<113> deformation twinning in the coarse grain layers and dislocation slip in the fine grain layers. The α/β-solution-treated alloy exhibited high strength with a lower ductility due to the small amount of deformation twinning. Full article
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Metallic Materials 2023)
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