Manufacture, Properties and Applications of Light Alloys

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: 30 June 2024 | Viewed by 3071

Special Issue Editor

School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: magnesium alloys; aluminum alloys; steel; metals; light metals; microstructure; precipitation; phase transformations; material characterization; transmission electron microscopy (TEM); scanning electron microscopy (SEM); electron microscopy; mechanical properties; materials processing; corrosion

Special Issue Information

Dear Colleagues,

In the context of carbon neutrality policies worldwide, light alloys, including magnesium alloys, aluminum alloys, and titanium alloys, with their high specific strength, are used as structural materials, where being lightweight is crucial for reducing CO2 emissions. Thus, extensive research on the manufacture, microstructure, properties and applications of these materials is of great importance. A deep understanding can be reached from both fundamental and applicational studies conducted at different levels, on the atomic scale, mesoscale, and macroscale.

This Special Issue aims to collect original research and review articles on the manufacture, microstructure, properties and applications of light alloys. Manuscripts, including experimental or simulation methods, are all welcome.

Dr. Bin Chen
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

  • light alloys
  • magnesium alloys
  • aluminum alloys
  • titanium alloys
  • microstructure
  • properties

Published Papers (2 papers)

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Research

13 pages, 10924 KiB  
Article
The Effect of Cu Addition on Corrosion Resistance of Al-Si-Mg-Cr Alloy
by Zhige Wang, Liang Dong, Bin Hu and Bin Chen
Metals 2023, 13(4), 795; https://doi.org/10.3390/met13040795 - 18 Apr 2023
Cited by 2 | Viewed by 1212
Abstract
Two kinds of alloys with and without the addition of Cu, Al-7%Si-0.3%Mg-0.3%Cr and Al-7%Si-0.3%Mg-0.3%Cr-1.5%Cu, are studied in this work. The addition of Cu can notably improve notably the strength of Al alloy but it reduces its corrosion resistance. In this study, the electrochemical [...] Read more.
Two kinds of alloys with and without the addition of Cu, Al-7%Si-0.3%Mg-0.3%Cr and Al-7%Si-0.3%Mg-0.3%Cr-1.5%Cu, are studied in this work. The addition of Cu can notably improve notably the strength of Al alloy but it reduces its corrosion resistance. In this study, the electrochemical workstation is used to measure the open circuit potential and polarization curve of alloys and immersion corrosion is carried out. SEM and TEM images are taken before and after immersion corrosion to observe the pitting and intergranular corrosion of the alloy. Results show that the addition of Cu accelerates the immersion corrosion rate of Al alloy by 26.8% to 269.2%. This affects the peak ageing and overageing samples the most. The influence is less evident for underaged samples. At the same time, the addition of Cu aggravates the aggregation of pitting corrosion in the primary step of corrosion of Al alloy and the intergranular corrosion around and within the pitting hole. β-Mg5Si6 precipitates and θ-Al3Cu precipitates are observed in Al-7%Si-0.3%Mg-0.3%Cr-1.5%Cu alloy. The Cu atoms occupy Si3/Al site of β and segregate at the edge of β. It is believed that the deterioration of corrosion performance essentially is attributed to the Si-enriched particles, Al13Cr4Si4 phase and the Cu-enriched precipitates, β-Mg5Si6 precipitates and θ-Al3Cu precipitates. Full article
(This article belongs to the Special Issue Manufacture, Properties and Applications of Light Alloys)
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13 pages, 4301 KiB  
Article
Effect of Different Heat Treatments on the Evolution of Novel Al-Si-Cu-Ni-Fe-Re Alloy Fabricated by Selective Laser Melting
by Jizhe Zhang, Pengfei Yan and Biao Yan
Metals 2022, 12(11), 1827; https://doi.org/10.3390/met12111827 - 27 Oct 2022
Cited by 1 | Viewed by 1372
Abstract
In this study, Cu and Ni are successfully added to additively manufactured Al-Si alloy by the mixing process to improve the strength and ductility of the alloy. The effects of different heat treatments on the microstructural evolution and bending properties of selective laser-melted [...] Read more.
In this study, Cu and Ni are successfully added to additively manufactured Al-Si alloy by the mixing process to improve the strength and ductility of the alloy. The effects of different heat treatments on the microstructural evolution and bending properties of selective laser-melted Al-Si-Cu-Ni-Fe-Re alloy are systematically investigated to optimize the mechanical properties. Nearly complete dense samples are initially additively manufactured with optimized parameters. The samples display a particular fiber network microstructure in which Cu-rich and Ni-rich phases distribute in an interwoven mesh around the eutectic silicon. After substrate plate heating (SPH) treatment, the network becomes denser, and the bending strength increases by 44.99 ± 1 MPa to 811.11 ± 29 MPa, despite the hardness decreases. Comparatively, solution aging (SQA) treatment results in the fiber network structures transforming into second-phase particles, which leads to a decline in bending strength and a significantly higher degree of ductility. Finally, the mechanisms of changes in microstructure and morphology, as well as mechanical properties after heat treatment, are discussed. Full article
(This article belongs to the Special Issue Manufacture, Properties and Applications of Light Alloys)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: The Effect of tool wear and material models on the prediction of machining-induced residual stresses in Ti6Al4V titanium
Authors: Gary Styger; Rudolph F Laubscher
Affiliation: Mechanical Engineering Science Department, University of Johannesburg
Abstract: This paper investigates the influence of tool wear and material models on predicting machining-induced residual stresses in Ti6Al4V titanium. Machining processes can introduce residual stresses in the workpiece, affecting its structural integrity and performance. Understanding and accurately predicting these residual stresses are crucial for ensuring the reliability and functionality of machined components. This study conducted a series of machining experiments on Ti6Al4V titanium at different cutting speeds with and without coolant. The tool wear was measured after each experiment. The residual stresses were measured using both non-destructive and semi-destructive techniques, and the results were compared with numerical simulations. Finite element analysis (FEA) was employed to predict the residual stresses, considering various material models and accounting for the effect of tool wear. The outcomes of this research shed light on the significance of tool wear and material models in the accurate prediction of machining-induced residual stresses. The findings provide valuable insights for optimizing machining parameters and improving the understanding of the underlying mechanisms governing residual stress formation in Ti6Al4V titanium during machining operations.

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