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Metals
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Computational Modeling and Numerical Simulation in Mechanical Behavior of Metallic...
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Computational Modeling and Numerical Simulation in Mechanical Behavior of Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Computation and Simulation on Metals".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 7279

Special Issue Editor

Prof. Dr. Georgios Maliaris

E-Mail Website
Guest Editor
International Hellenic University, Thessaloniki, Greece
Interests: CAD/CAM/CAE systems; Algorithmic design; Materials engineering; Additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The demand for innovative materials driven by the requirements of the industry for manufacturing products with better properties has led to the development of many materials (especially metallic ones, based on steel and other nonferrous metals and alloys) with complex (i.e., cellular) or multicomponent (i.e., composites) structures. Understanding of the mechanical behavior is an essential requirement for the successful implementation of metals in various modern applications. Material properties and their mechanical behavior ensue from their components and internal microstructure, which can be affected by the production procedure.

Although there are a number of experiments that provide precious data, the use of computational modeling and numerical simulation have proved to provide invaluable insight in many aspects of the mechanical behavior of metals. Nowadays, considering the huge progress of computing power, it is possible to consider physical phenomena such as thermal-mechanical and electro-thermal-mechanical which are commonly used during production of metals and affect their properties. Also, the development and implementation of specialized material models (isotropic or kinematic hardening, strain rate based, creep, etc.) help to conduct simulations as close to reality as possible.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Georgios Maliaris
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

  • Mechanical behavior
  • Material properties
  • Microstructure
  • Finite element analysis
  • Metals
  • MMCs
  • Cellular materials
  • Structural phenomena

Published Papers (4 papers)

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Research

8 pages, 21669 KiB  
Article
Modelling Dynamic Recrystallization of A356 Aluminum Alloy during Hot Deformation
by Zhenglong Liang, Wentao Li, Bingguo Zhu and Liqun Niu
Metals 2022, 12(9), 1407; https://doi.org/10.3390/met12091407 - 25 Aug 2022
Cited by 3 | Viewed by 1416
Abstract
The flow stress and dynamic recrystallization behavior of A356 aluminum alloy was studied, with a strain rate ranging from 0.001 s−1 to 1 s−1 and temperature ranging from 300 to 500 °C. Both the true stress–strain curves and microstructure examination of [...] Read more.
The flow stress and dynamic recrystallization behavior of A356 aluminum alloy was studied, with a strain rate ranging from 0.001 s−1 to 1 s−1 and temperature ranging from 300 to 500 °C. Both the true stress–strain curves and microstructure examination of A356 aluminum alloy indicated that dynamic recrystallization occurred during the isothermal compression. A physical dynamic recrystallization model based on the Arrhenius equation was developed, and this model can accurately predict the dynamic recrystallization fraction of A356 aluminum alloy during the isothermal compression. Finally, this model was implemented in FEM software Forge, and the microstructure evolution was simulated well. Full article
(This article belongs to the Special Issue Computational Modeling and Numerical Simulation in Mechanical Behavior of Metallic Materials)
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31 pages, 15785 KiB  
Article
Numerical Study on Asymmetrical Rolled Aluminum Alloy Sheets Using the Visco-Plastic Self-Consistent (VPSC) Method
by Ana Graça, Gabriela Vincze, Wei Wen, Marilena C. Butuc and Augusto B. Lopes
Metals 2022, 12(6), 979; https://doi.org/10.3390/met12060979 - 07 Jun 2022
Cited by 2 | Viewed by 1661
Abstract
Asymmetric rolling is a forming process that has raised interest among researchers due to the significant improvements it introduces to the mechanical response of metals. The main objective of the present work is to perform a numerical study on asymmetrical rolled aluminum alloy [...] Read more.
Asymmetric rolling is a forming process that has raised interest among researchers due to the significant improvements it introduces to the mechanical response of metals. The main objective of the present work is to perform a numerical study on asymmetrical rolled aluminum alloy sheets to identify and correlate the effect of the additional shear strain component on the material formability, tensile strength, and texture orientations development during multi-pass metal forming. Conventional (CR), asymmetric continuous (ASR-C), and asymmetric rolling-reverse (ASR-R) simulations were carried out using the visco-plastic self-consistent (VPSC) code. For the ASR process, two different shear strain values were prescribed. Moreover, two hardening models were considered: a Voce-type law and a dislocation-based model that accounts for strain path changes during metal forming. Results showed that the ASR process is able to improve the plastic strain ratio and tensile strength. The ASR-C revealed better results, although the expected shear orientations are only evident in the ASR-R process. Full article
(This article belongs to the Special Issue Computational Modeling and Numerical Simulation in Mechanical Behavior of Metallic Materials)
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16 pages, 5669 KiB  
Article
Investigation of the Shot Size Effect on Residual Stresses through a 2D FEM Model of the Shot Peening Process
by Christos Gakias, Georgios Maliaris and Georgios Savaidis
Metals 2022, 12(6), 956; https://doi.org/10.3390/met12060956 - 02 Jun 2022
Cited by 3 | Viewed by 1736
Abstract
Shot peening is a surface treatment process commonly used to enhance the fatigue properties of metallic engineering components. In industry, various types of shots are used, and a common strategy is to regenerate a portion (approximately up to 35% of the total shot [...] Read more.
Shot peening is a surface treatment process commonly used to enhance the fatigue properties of metallic engineering components. In industry, various types of shots are used, and a common strategy is to regenerate a portion (approximately up to 35% of the total shot mix weight) of used and worn shots with new ones of the same type. Shots of the same type do not have a constant diameter, as it is concluded by experience that the diameter variation is beneficial for fatigue life. The process of stochasticity raises the difficulty for the application of computational methods, such as finite elements analysis, for the calculation of pivotal parameters, for instance, the development of the residual stress field. In the present work, a recently developed plane strain 2D FEM model is used, which has the capability to consider various shot size distributions. With the aid of this model, it became feasible to study the effect of the shot-size distribution, its sensitivity, and to draw conclusions considering the industrial practice of using a mixture with new and worn shots. The diameter of these shot types differs significantly, and a used shot may have a diameter three times smaller than a new one. As concluded from the finite element results, which are verified from experimental measurements, a shot type with a larger diameter causes a wider valley in the stress profile, and the peak stress depth increases. Alongside the peak stress depth movement, with smaller shots, larger residual stresses are observed closer to the surface. Thus, the superimposition of many shots with variable diameters causes the development of a residual stress field with enhanced characteristics. Furthermore, this residual stress field may be further enhanced by adjusting or increasing the percentage weight of the used shots, up to ~50%. Full article
(This article belongs to the Special Issue Computational Modeling and Numerical Simulation in Mechanical Behavior of Metallic Materials)
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10 pages, 2143 KiB  
Article
Plastically-Induced Volume Deformation of Nanocrystalline α-Fe with a <110> Columnar Structure
by J. Gil Sevillano, I. Aldazabal and J. Aldazabal
Metals 2020, 10(12), 1649; https://doi.org/10.3390/met10121649 - 07 Dec 2020
Viewed by 1553
Abstract
Volume changes accompanying the plastic deformation at 300 K of nanocrystalline samples of α-Fe with a columnar grain structure possessing a ⟨11¯0⟩ random fiber texture has been obtained from molecular dynamics (MD) simulations. The samples were strained in [...] Read more.
Volume changes accompanying the plastic deformation at 300 K of nanocrystalline samples of α-Fe with a columnar grain structure possessing a ⟨11¯0⟩ random fiber texture has been obtained from molecular dynamics (MD) simulations. The samples were strained in tension along the common axial direction of the columnar grains. After removal of the elastic volume change, the evolution of plastic volume strain was obtained. Small but non-negligible volume dilations or contractions are observed depending on size (samples of very small grain size show volume contraction). The rate of volume change is high during the first 10% plastic deformation and continues at a low pace thereafter; the first 10% deformation represents a transient in the stress–strain behavior too. The complex behavior observed is reasonably explained by the superposition of contributions from different plastically-induced structural changes to the mass density change: Mainly from changes of grain size, grain boundary structure, dislocation density and density of point-defects. The results are of interest for the development of crystal plasticity theories not restricted by the volume conserving assumption. Full article
(This article belongs to the Special Issue Computational Modeling and Numerical Simulation in Mechanical Behavior of Metallic Materials)
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