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Special Issue "Advanced Light Metal and Alloys: Preparation, Characterization, and Applications"

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

Deadline for manuscript submissions: 20 September 2023 | Viewed by 1681

Special Issue Editor

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: beryllium; Cu-based shape memory alloys; microstructure and irradiation damage of materials

Special Issue Information

Dear Colleagues,

Adopting light-weight equipment and reducing the amount of materials we use are new and essential trends in science and technology, adopted to preserve our limited stores of natural resources and energy. Under this trend, the development, production and application of light-weight metals and alloys are becoming increasingly important. These metals and alloys are materials of relatively low density and high strength-to-weight ratios, e.g., lithium (Li), beryllium (Be), aluminum (Al), magnesium (Mg), titanium (Ti), and so on. Light-weight metal and alloys are widely used in aerospace, automotive, architectural, lithographic, packaging, and electrical applications. For example, about 70% of commercial civil aircraft airframes are made from aluminium alloys and, without aluminium, civil aviation would not be economically viable. One kilogram of metal saved in the design and construction of an aircraft can result in important weight savings, leading to reduced construction costs and fuel requirements. Beryllium is used in aircraft components, missiles, spacecraft, satellite gyroscopes, scan mirrors, sports equipment, and electronics as a structural and functional material; it comprises a beneficial combination of high flexural rigidity, thermal stability, thermal conductivity and low density. The development of high-performance light-weight metals and alloys is ever increasing. Materials with high performance, stability, and low cost are critical for realizing a sustainable future.

The aim of this Special Issue, “Advanced Light Metal and Alloys: Preparation, Characterization, and Applications”, is to present recent advancements in various aspects related to material design, processes and applications. These include, but are not limited to:

  • The development of advanced light-weight metals and alloys with high strength, high temperature resistance, corrosion resistance, and other excellent properties;
  • The design of high-performance light-weight metals and alloys using empirical, theoretical and computational methods, including DFT, deep learning, and so on;
  • The development of new process methods and heat treatment methods of light-weight metals and alloys including friction stir processing (FSP), additive manufacturing (AM), and related topics;
  • Microstructural evolution and related mechanism exploration in light-weight metals and alloys subjected to deformation, corrosion, creep and other processes.

We are pleased to invite you to submit full research papers, communications, and review papers to this Special Issue.

Dr. Pingping Liu
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. 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 2300 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

  • light metal and alloys
  • Li
  • Be
  • Al
  • Mg
  • Ti
  • material design
  • additive manufacturing
  • friction stir welding
  • microstructure
  • strengthening mechanisms

Published Papers (3 papers)

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Research

Article
Rheological Behavior of the A356 Alloy in the Semisolid State at Low Shear Rates
Materials 2023, 16(6), 2280; https://doi.org/10.3390/ma16062280 - 12 Mar 2023
Viewed by 280
Abstract
To control the semisolid processing of aluminum alloys produced by the additive manufacturing technique, an exhaustive knowledge of their rheological behavior is required. In the semisolid state, metallic materials can show rheological characteristics similar to those of polymers, so semisolid state shaping is [...] Read more.
To control the semisolid processing of aluminum alloys produced by the additive manufacturing technique, an exhaustive knowledge of their rheological behavior is required. In the semisolid state, metallic materials can show rheological characteristics similar to those of polymers, so semisolid state shaping is one of the currently considered routes for additive manufacturing with metallic materials. In this work, an approximation of the rheological control of the A356 aluminum alloy for its subsequent 3D manufacturing was carried out at a very low shear rate. A continuous cooling rheometer was designed and used, evaluating the influence of different process parameters on the viscosity variation of the aluminum alloy in the semisolid state. The results show an anomalous flow variation, indicating dilatant, and not thixotropic behavior, for very low shear rates. Full article
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Article
Short Circuiting Transfer, Formation, and Microstructure of Ti-6Al-4V Alloy by External Longitudinal Magnetic Field Hybrid Metal Inert Gas Welding Additive Manufacturing
Materials 2022, 15(21), 7500; https://doi.org/10.3390/ma15217500 - 26 Oct 2022
Viewed by 445
Abstract
In this work, the external longitudinal magnetic field hybrid metal inert gas welding (M-MIG) additive manufacturing method is employed to produce the Ti-6Al-4V alloy part. The effect of process parameters on the droplet transfer formation and microstructure of the part was studied by [...] Read more.
In this work, the external longitudinal magnetic field hybrid metal inert gas welding (M-MIG) additive manufacturing method is employed to produce the Ti-6Al-4V alloy part. The effect of process parameters on the droplet transfer formation and microstructure of the part was studied by a high-speed camera, optical microscope, and electron backscattered diffraction. The results showed that a typical short-circuiting transfer was obtained with the wire feeding speed of 2 m/min–4 m/min. An external longitudinal magnetic field had an obvious effect on the arc shape. The uniform formation of the deposition layer was obtained with the wire feeding speed of 4 m/min. The width of M-MIG deposition layer was greater than that of the MIG, and the width of M-MIG deposition layer was increased with the increase of the magnetic excitation current. The microstructure of the deposition layer was mainly comprised of acicular martensite α’ and massive martensite αm. In addition, the β grain size in the M-MIG was less than that of the MIG. The average microhardness of the MIG deposition layer was 281.6 HV, which was less than that of M-MIG. Full article
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Article
Influence of Annealing Time on Microstructure and Mechanical Properties of Al-14.5Si Alloy Prepared by Super-Gravity Solidification and Cold-Rolling
Materials 2022, 15(16), 5475; https://doi.org/10.3390/ma15165475 - 09 Aug 2022
Viewed by 608
Abstract
In this paper, super-gravity solidification and cold-rolling were utilized to obtain Al-14.5Si alloys. The influence of annealing time on microstructure and mechanical properties of Al-14.5Si alloys was investigated. Our results indicated that high elongation was achieved by super-gravity solidification due to the submicron [...] Read more.
In this paper, super-gravity solidification and cold-rolling were utilized to obtain Al-14.5Si alloys. The influence of annealing time on microstructure and mechanical properties of Al-14.5Si alloys was investigated. Our results indicated that high elongation was achieved by super-gravity solidification due to the submicron eutectic Si, making it possible to undertake the conventional cold-rolling. The yield strength (~214 ± 11 MPa) was significantly enhanced (~68.5%) after cold-rolling mainly due to high dislocation density. The coarsening of eutectic Si could be observed during annealing, which resulted in a decrease in yield strength. The elimination of internal stress and lattice distortion during annealing led to a decrease in micro-cracks/voids beneath the fracture surface during tensile testing, which in turn enhanced the elongation. Full article
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