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Metals
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Plastic Deformation of Lightweight Alloys
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Plastic Deformation of Lightweight Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 5639

Special Issue Editors

Dr. Xiaolong Ma

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
Interests: deformation mechanism; plasticity; microstructure–property relationship; aluminum alloys; titanium alloys; magnesium alloys
Dr. Tianhao Wang

E-Mail Website
Guest Editor
Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA
Interests: additive manufacturing; extrusion; solid phase processing; solid phase welding; high strain rate plastic deformation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Lightweight alloys are a critical class of structural materials with high specific strength (strength-to-weight ratio), such as Ti, Al and Mg alloys and their metal matrix composites. They are promising supplanters of steels in, for example, vehicle structures to combat global warming amid the ever-increasing anthropogenic CO2 emissions. The past few decades have witnessed remarkable progress in lightweight alloys with novel designs in composition, microstructure and processing. Further development of such alloys with superior mechanical performances is also predicated on a deep understanding of their plastic deformation process at different length scales. Recent advancements in experimental and computational methods would facilitate investigations of plastic deformation under a multiscale scheme to likely reveal new insights. This new knowledge will enable innovative processing routes using plastic deformation and enhanced mechanical properties by controlling the deformation mechanisms.

This Special Issue aims to collect a broad set of original research articles on various topics around the plastic deformation of lightweight alloys. We welcome and look forward to your latest contributions to these areas of investigation. Potential topics include, but are not limited to: I) Design, processing and characterization of lightweight wrought alloys; II) Experimental and/or computational investigation of plastic deformation phenomena in lightweight alloys at all length scales; III) Correlation between plastic deformation mechanisms and mechanical properties in lightweight alloys; and IV) Strain, strain rate and temperature effect on deformation mechanisms in lightweight alloys. 

Dr. Xiaolong Ma
Dr. Tianhao Wang
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. 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

  • deformation mechanism
  • plasticity
  • microstructure–property relationship
  • aluminum alloys
  • titanium alloys
  • magnesium alloys

Published Papers (3 papers)

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Research

11 pages, 3330 KiB  
Article
Damping Analysis of High Damping MgO/Mg Composites in Anelastic and Microplastic Deformation
by Diqing Wan, Fan Yang, Jiajun Hu, Shaoyun Dong, Hao Tang, Yu Wang, Yandan Xue, Guoliang Han, Jie Kang, Jingwen Xu and Guanmei Zeng
Metals 2023, 13(3), 445; https://doi.org/10.3390/met13030445 - 21 Feb 2023
Viewed by 1096
Abstract
In this study, MgO/Mg composites were prepared using direct melt oxidation to verify the effects of elastic deformation and microplastic deformation on the damping properties. It was found that the composites have high damping properties at a certain strain amplitude, which indicated that [...] Read more.
In this study, MgO/Mg composites were prepared using direct melt oxidation to verify the effects of elastic deformation and microplastic deformation on the damping properties. It was found that the composites have high damping properties at a certain strain amplitude, which indicated that the damping properties of the magnesium matrix were effectively enhanced by the in situ-synthesized oxide particle. In addition, other damping mechanisms different from the G–L dislocation damping mechanism exist in MgO/Mg composites, i.e., the damping mechanism of the microplastic deformation, leading to a model of microplastic deformation damping established and its mechanistic analysis. Full article
(This article belongs to the Special Issue Plastic Deformation of Lightweight Alloys)
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14 pages, 14074 KiB  
Article
Prediction of Mechanical Properties and Optimization of Friction Stir Welded 2195 Aluminum Alloy Based on BP Neural Network
by Fanqi Yu, Yunqiang Zhao, Zhicheng Lin, Yugang Miao, Fei Zhao and Yingchun Xie
Metals 2023, 13(2), 267; https://doi.org/10.3390/met13020267 - 29 Jan 2023
Cited by 6 | Viewed by 1752
Abstract
Friction stir welding (FSW) is regarded as an important joining process for the next generation of aerospace aluminum alloys. However, the performance of the FSW process often suffers from low precision and a long test cycle. In order to overcome these problems, a [...] Read more.
Friction stir welding (FSW) is regarded as an important joining process for the next generation of aerospace aluminum alloys. However, the performance of the FSW process often suffers from low precision and a long test cycle. In order to overcome these problems, a machine learning model based on a backpropagation neural network (BPNN) was developed to optimize the FSW of 2195 aluminum alloys. A four-dimensional mapping relationship between welding parameters and mechanical properties of joints was established through the analysis and mining of FSW data. The intelligent optimization of the welding process and the prediction of joint properties were realized. The weld formation characteristics at different welding parameters were analyzed to reveal the metallurgical mechanism behind the mapping relationship of the process-property obtained by the BPNN model. The results showed that the prediction accuracy of the method proposed could reach 92%. The welding parameters optimized by the BPNN model were 1810 rpm, 105 mm/min, and 3 kN for the rotational speed, welding speed, and welding pressure, respectively. Under these conditions, the tensile strength of the joint was found to be 415 MPa, which deviated from the experimental value by 3.71%. Full article
(This article belongs to the Special Issue Plastic Deformation of Lightweight Alloys)
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21 pages, 7311 KiB  
Article
Mechanical Aspects of Nonhomogeneous Deformation of Aluminum Single Crystals under Compression along [100] and [110] Directions
by Varvara Romanova, Ruslan Balokhonov, Olga Zinovieva, Dmitry Lychagin, Evgeniya Emelianova and Ekaterina Dymnich
Metals 2022, 12(3), 397; https://doi.org/10.3390/met12030397 - 24 Feb 2022
Viewed by 1980
Abstract
The deformation behavior of aluminum single crystals subjected to compression along the [100] and [110] directions is numerically examined in terms of crystal plasticity. A constitutive model taking into account slip geometry in face-centered cubic crystals is developed using experimental data for the [...] Read more.
The deformation behavior of aluminum single crystals subjected to compression along the [100] and [110] directions is numerically examined in terms of crystal plasticity. A constitutive model taking into account slip geometry in face-centered cubic crystals is developed using experimental data for the single-crystal samples with lateral sides coplanar to certain crystal planes. Two sets of calculations are performed using ABAQUS/Explicit to examine the features of plastic strain evolution in perfectly plastic and strain-hardened crystals. Special attention is given to the discussion of mechanical aspects of crystal fragmentation. Several distinct deformation stages are revealed in the calculations. In the first stage, narrow solitary fronts of plastic deformation are alternately formed near the top or bottom surfaces and then propagate towards opposite ends to save the symmetry of the crystal shape. The strain rate within the fronts is an order of magnitude higher than the average strain rate. The first stage lasts longer in the strain-hardened crystals, eventually giving way to an intermediate stage of multiple slips in different crystal parts. Finally, the crystal shape becomes asymmetrical, but no pronounced macroscopic strain localization has been revealed at any deformation stage. The second stage in perfectly plastic crystals relates to abrupt strain localization within a through-thickness band-shaped region, accompanied by macroscale crystal fragmentation. Stress analysis has shown that pure compression took place only in the first deformation stage. Once the crystal shape has lost its symmetry, the compressive stress in some regions progressively decreases to zero and eventually turns tensile. Full article
(This article belongs to the Special Issue Plastic Deformation of Lightweight Alloys)
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