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Metals
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Research on Advanced Forming Technology and Process of Light Alloys
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Research on Advanced Forming Technology and Process of Light Alloys

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 (31 July 2023) | Viewed by 3822

Special Issue Editor

Prof. Dr. Zhaoxin Du

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, China
Interests: metals; forming technology; heat treatments; microstructures; mechanical properties

Special Issue Information

Dear Colleagues,

Light alloys are widely used in the fields of national economy and equipment manufacturing. For instance, the application of titanium, aluminum, magnesium, and their alloys has attracted increasing attention in aerospace, biomedicine, transportation, and other fields. Before these materials can be applied, they need to undergo some specific forming processes. Therefore, forming technology is not only the main means of material preparation, but also an important part of equipment manufacturing.

Forming technology will have a very important impact on the final quality and service performance of materials. Therefore, in order to ensure the product quality and develop the service performance limit, it is necessary to deeply excavate the forming technology and even exploit new forming technology of light alloy materials. So, the forming technology and process of light alloys facing many challenges and opportunities.

In this Special Issue, we welcome articles that focus on advanced forming technology and processes, especially casting, liquid, plastic, powder, connection forming, and the subsequent treatment process of light alloys, and as well as the impact of these technologies on the final product.

Prof. Dr. Zhaoxin Du
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

  • metals
  • forming technology
  • heat treatments
  • microstructures
  • mechanical properties

Published Papers (3 papers)

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Research

14 pages, 5001 KiB  
Article
Study on Growth Mechanism and Characteristics of Zirconium Alloy Micro-Arc Oxidation Film
by Mingli Wang, Kai Lv, Zhaoxin Du, Weidong Chen, Pengfei Ji, Wei Wang and Zhi Pang
Metals 2023, 13(5), 935; https://doi.org/10.3390/met13050935 - 11 May 2023
Cited by 1 | Viewed by 1391
Abstract
Ceramic coatings on R60705 zirconium alloy were prepared on the surface by the micro-arc oxidation (MAO) technique in electrolytes containing Na2SiO3, NaOH, and Na2EDTA. The growth behavior of the MAO ceramic coatings at different stages, including growth [...] Read more.
Ceramic coatings on R60705 zirconium alloy were prepared on the surface by the micro-arc oxidation (MAO) technique in electrolytes containing Na2SiO3, NaOH, and Na2EDTA. The growth behavior of the MAO ceramic coatings at different stages, including growth rate, microstructure, and phase composition, was investigated using the method of direct observation of the boundary area. The results showed that the growth of the MAO coatings on R60705 zirconium alloy occurred in both inward and outward directions. At an oxidation time of 5 min, the thickness of the oxidation layer increased fastest, reaching 103.43 μm, with a growth rate of 0.345 μm/s. After 5 min, the growth rate decreased and tended to level off around 15 min, with a thickness and growth rate of 162.7 μm and 0.181 μm/s, respectively. The total thickness of the coatings continuously increased throughout the process, with the outward growth thickness always higher than the inward growth thickness. The composition of the zirconium alloy micro-arc oxidation coatings mainly consisted of monoclinic zirconia (m-ZrO2), tetragonal zirconia (t-ZrO2), and a small amount of SiO2. The main elements in the coatings were Zr, O, and Si. The corrosion resistance of the zirconium alloy micro-arc oxidation coatings increased first and then decreased with increasing oxidation time, with a corrosion current density of 8.876 × 10−9 A·cm−2 at 15 min, indicating the best corrosion resistance. Full article
(This article belongs to the Special Issue Research on Advanced Forming Technology and Process of Light Alloys)
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15 pages, 6243 KiB  
Article
Multi-Phase Structure Control and Interfacial Investigation of TiB2/Hypereutectic Al-Si Alloy
by Chuanyong Li, Xingguo Zhang, Zhengwei Guo, Lu Li, Quan Shan and Zulai Li
Metals 2023, 13(5), 933; https://doi.org/10.3390/met13050933 - 11 May 2023
Cited by 1 | Viewed by 1145
Abstract
The effect of the distribution of the primary phase Si and TiB2 particles in the hypereutectic Al-Si alloy was studied and found to be influenced by the cooling rate. Therefore, this article studies the effect of the cooling rate on the multi-phase [...] Read more.
The effect of the distribution of the primary phase Si and TiB2 particles in the hypereutectic Al-Si alloy was studied and found to be influenced by the cooling rate. Therefore, this article studies the effect of the cooling rate on the multi-phase structure of TiB2 particles in Al-20Si using a wedge-shaped mold. The sizes, shapes, and distribution of primary phase Si and TiB2 particles inside primary phase Si were observed through SEM. The effect of TiB2 particles on cracks in primary phase Si was studied using nanoindentation technology, and the interface relationship between primary Si and TiB2 was studied using TEM. Finally, based on the experimental results, the trapping mechanism of primary Si for TiB2 particles is discussed. The results indicate that the faster the cooling rate, the finer and more uniform the size distribution of the primary Si phase in the structure. TiB2 mostly exists as individual particles. Moreover, the pushing rate of the solid–liquid interface during solidification is faster, resulting in more TiB2 particles being engulfed by the primary Si phase. Full article
(This article belongs to the Special Issue Research on Advanced Forming Technology and Process of Light Alloys)
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16 pages, 11871 KiB  
Article
Regulation of Microstructure to Optimize Mechanical Properties of Ti-15Mo-3Al-2.7Nb-0.2Si via Solution-Duplex Ageing
by Xudong Kang, Hanyu Jiang, Zhaoxin Du, Tianhao Gong, Jingwen Liu, Wenxia Guo, Jun Cheng, Jingshun Liu and Guowei Li
Metals 2023, 13(5), 869; https://doi.org/10.3390/met13050869 - 29 Apr 2023
Viewed by 979
Abstract
The production of alloys with high strength and toughness concurrently is still a difficult challenge. Here, we designed a simple solution-ageing heat treatment system to control the morphology and density of α in Ti-15Mo-3Al-2.7Nb-0.2Si via different heat treatment temperatures. The experimental results show [...] Read more.
The production of alloys with high strength and toughness concurrently is still a difficult challenge. Here, we designed a simple solution-ageing heat treatment system to control the morphology and density of α in Ti-15Mo-3Al-2.7Nb-0.2Si via different heat treatment temperatures. The experimental results show that Ti-15Mo-3Al-2.7Nb-0.2Si exhibits a synergistic combination of tensile strength (1364 MPa), plasticity (7.8% elongation), and fracture toughness (101 MPa·m1/2) through solutions in the α/β biphasic region and duplex ageing. Notably, the strength of the alloy after the second step of the ageing process is increased by 15% compared with that after the first step of the ageing process. However, there is less than a 5% reduction in the fracture toughness. TEM observations show that the matrix continues to precipitate denser secondary α during duplex ageing, which causes the strength to increase significantly and causes the fracture toughness to weaken. Our work may provide a novel method to optimize the mechanical properties of alloys by controlling the precipitates. Full article
(This article belongs to the Special Issue Research on Advanced Forming Technology and Process of Light Alloys)
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