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Crystals
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Recent Advances in Light Alloys and Their Applications
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Recent Advances in Light Alloys and Their Applications

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

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 5935

Special Issue Editors

Dr. Junfeng Xiang

E-Mail Website
Guest Editor
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China
Interests: titanium alloy; metal matrix composites; additive manufacturing; superplastic forming; high-efficiency and high-precision machining; surface strengthening
Dr. Jie Yi

E-Mail Website
Guest Editor
School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101, China
Interests: light alloy; precision forming; thin-walled parts; low-temperature cutting; coupling deformation; precision control
Dr. Xinli Ye

E-Mail Website
Guest Editor
School of Civil Aviation, Northwestern Polytechnical University, Xi’an 710072, China
Interests: ceramic matrix composites for electromagnetic wave absorption
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The growing challenges in fuel economy improvement and greenhouse gas emission control have become the driving force in aerospace, automotive, architectural, lithographic, packaging, electrical, and electronic industries to produce lightweight products. Additionally, the weight reduction may contribute to superior recyclability and/or performance (e.g., improved fuel efficiency and cost). One effective strategy is to develop and implement lightweight yet high-performance light alloys as alternative solutions for conventional engineering materials such as cast iron and steel. Aluminium is the most versatile of these materials, titanium is the most corrosion-resistant with very high strength, and magnesium has the lowest density. Since the last century, these three metals and their alloys, due to their high strength-to-weight ratio, have been extensively applied to various industrial systems. This Special Issue on “Recent Advances in Light Alloys and Their Applications” aims to further investigate the in-depth knowledge about processing techniques, microstructure features, and mechanical properties of light alloys to develop sustainable and cost-effective engineering structures for advanced applications.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: alloy design, microstructure and property relationships, simulation and modeling, processing innovations, novel forming and joining technologies, machining, and surface strengthening as well as sophisticated examples of successful applications in lightweight aircraft, automotive, and energy technologies. We look forward to receiving your contributions.

Dr. Junfeng Xiang
Dr. Jie Yi
Dr. Xinli Ye
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.

Published Papers (4 papers)

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Research

20 pages, 26931 KiB  
Article
Effects of Different Surface Treatment Processes on Bonding Properties of Aluminum Alloys under Full Temperature Field Environment
by Xinmin Dong, Jigao Liu, Hanqing Hao, Yinglei Xue and Linfeng Xu
Crystals 2023, 13(8), 1240; https://doi.org/10.3390/cryst13081240 - 11 Aug 2023
Cited by 1 | Viewed by 860
Abstract
Our aim was to study the influence of the surface treatment process on the mechanical properties of an adhesive. This study takes aluminum alloy 6061 as the substrate; carries out grinding, sandblasting, plasma, grinding + plasma, and sandblasting + plasma surface treatment processes; [...] Read more.
Our aim was to study the influence of the surface treatment process on the mechanical properties of an adhesive. This study takes aluminum alloy 6061 as the substrate; carries out grinding, sandblasting, plasma, grinding + plasma, and sandblasting + plasma surface treatment processes; and chooses the ISR 7008 adhesive to make aluminum alloy butt joints, and the joints Connectors are in −40 °C, −20 °C, 0 °C, 40 °C, 60 °C, and 80 °C environments, respectively (1–3 days of a constant-temperature test). The results show that the plasma surface treatment process helps to improve the activity and hydrophilicity of the bonding surface; the plasma surface treatment process helps to improve the adhesive strength of the joints under the environment of −40 °C and 80 °C; and under the environment of −20–60 °C, the sandblasting + plasma surface treatment process helps to improve the adhesive strength of the joints. By analyzing the infrared spectra of the ISR 7008 adhesive, it was found that the contents of γN−H, νC−C, νC−N, and νC−O were higher in the interval from 25 °C to 80 °C than those in the interval from −40 °C to 0 °C, which resulted in the decrease in adhesive properties. Full article
(This article belongs to the Special Issue Recent Advances in Light Alloys and Their Applications)
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17 pages, 6763 KiB  
Article
Mechanical Properties of 6061 Aluminum Alloy under Cyclic Tensile Loading
by Tengjiao Hong, Fengjuan Ding, Feng Chen, Hua Zhang, Qiliang Zeng and Juan Wang
Crystals 2023, 13(8), 1171; https://doi.org/10.3390/cryst13081171 - 27 Jul 2023
Cited by 1 | Viewed by 1725
Abstract
During the service process of an aluminum alloy structure, its complex deformation zone experiences repeated loading problems such as repeated tension, compression, bending and reverse bending. At the same time, the cyclic loading and heat treatment process also have a certain impact on [...] Read more.
During the service process of an aluminum alloy structure, its complex deformation zone experiences repeated loading problems such as repeated tension, compression, bending and reverse bending. At the same time, the cyclic loading and heat treatment process also have a certain impact on the mechanical properties of aluminum alloy extruded tubes. Therefore, the study of heat treatment process parameters has important engineering and practical value for the mechanical properties of aluminum alloy extrusion tubes under cyclic loading conditions. The experiment takes 6061-T6 aluminum alloy extruded tubes as the research objects. In the study, heat treatment and cyclic tensile tests were carried out on 26 aluminum alloy specimens to study the effects of different heat treatment parameters (such as heating temperature, holding time, and cooling method) on the stress–strain hysteresis curves, stress characteristics, hysteretic energy, skeleton curves and failure characteristics of the alloy under the same loading system. In addition, different cyclic tensile tests were carried out on 20 aluminum alloy samples without secondary heat treatment to discuss the effects of different cyclic loading regimes on the mechanical properties of the alloy. The research results indicate that the effect of heating temperature on the cyclic loading performance of the alloy is greater than that of the holding time, and the effect of the cooling method on the cyclic loading performance of the alloy is not obvious. A cyclic tensile loading regime has a significant impact on the strength, elongation and hysteresis energy of the alloy. The hysteretic behavior of the alloy during cyclic tensile loading depends on the applied stress level and loading history. As the number of cycles increases, the shape of the hysteresis curve tends to be stable, but there is no monotonic relationship between the number of cycles loaded and the hysteresis energy. Full article
(This article belongs to the Special Issue Recent Advances in Light Alloys and Their Applications)
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11 pages, 9387 KiB  
Article
Effect of the Cu/Mg Ratio on Mechanical Properties and Corrosion Resistance of Wrought Al–Cu–Mg–Ag Alloy
by Talal Talib Alshammari, Muhammad Farzik Ijaz, Hamad F. Alharbi and Mahmoud S. Soliman
Crystals 2023, 13(6), 908; https://doi.org/10.3390/cryst13060908 - 02 Jun 2023
Cited by 2 | Viewed by 1268
Abstract
The present study aimed to investigate the influence of magnesium (Mg) on the mechanical properties and corrosion behavior of wrought Al–4Cu–xMg–0.6Ag alloys. The results from Optical Microscope, SEM, XRD analysis, and Thermo-Calc simulation were used to identify the microstructure formed after the aging [...] Read more.
The present study aimed to investigate the influence of magnesium (Mg) on the mechanical properties and corrosion behavior of wrought Al–4Cu–xMg–0.6Ag alloys. The results from Optical Microscope, SEM, XRD analysis, and Thermo-Calc simulation were used to identify the microstructure formed after the aging process. Testing for hardness and tensile strength was conducted, in addition to corrosion testing. It was found that Mg significantly impacts the hardness of the alloys, with a high Mg content (low Cu/Mg ratio) increasing the hardness but reducing the tensile strength and ductility. This study attributed this to the formation of the S phase, which is dependent on both the quantity in the bulk and the size of the phase. The grain size was found to be finer with a higher Mg content, since the particle size inhibits grain growth during the artificial aging process. Counterintuitively, the corrosion activity was reduced in the high-Mg-content alloy due to its large particle size and the reduced galvanic cell effect. This study highlighted the importance of considering the effects of Mg on the mechanical properties and corrosion behavior of Al–Cu–Mg–Ag alloys. Full article
(This article belongs to the Special Issue Recent Advances in Light Alloys and Their Applications)
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14 pages, 90379 KiB  
Article
Research on Technology of 7075 Aluminum Alloy Processed by Variable Polarity TIG Additive Manufacturing Utilizing Nanoparticle-Reinforced Welding Wire with TiB2
by Zhigang Shen, Zhisheng Wu, Ting Wang, Tuosheng Jia and Cuirong Liu
Crystals 2023, 13(3), 399; https://doi.org/10.3390/cryst13030399 - 25 Feb 2023
Cited by 2 | Viewed by 1342
Abstract
TIG arc additive manufacturing experiments were performed utilizing TiB2 nanoparticle-reinforced toward to 7075 aluminum alloy welding wire, and the microstructure and mechanical properties corresponding to different locations of welding plate were investigated. At the top location of the deposited layer, the microstructure [...] Read more.
TIG arc additive manufacturing experiments were performed utilizing TiB2 nanoparticle-reinforced toward to 7075 aluminum alloy welding wire, and the microstructure and mechanical properties corresponding to different locations of welding plate were investigated. At the top location of the deposited layer, the microstructure was characterized by fine dendrite induced by solidification, and equiaxed grain was predominant at the middle location. The grain size at the bottom location was obviously larger compared to the top and middle locations, and secondary-phase particles were homogeneously distributed at the grain boundary or inner grains. The mechanical properties at the top location of the deposited layer were most excellent compared to the middle and bottom locations, and the tensile properties and micro-hardness were decreased with the detected area varying from middle location to the bottom location. The excellent combination of fracture elongation and maximum of tensile strength corresponding to different locations on the deposited layer were determined to be 361.8 MPa with respect to the 7075 aluminum alloy welding wire, respectively, which was higher compared to the samples processed by general arc additive manufacturing process with tensile strength of (279.4 ± 5.3) MPa, indicating the TiB2 nano-sized particles possessed certain enhancing effects on the investigated 7075 aluminum alloy. Full article
(This article belongs to the Special Issue Recent Advances in Light Alloys and Their Applications)
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