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Multiphysics and Multilevel Modeling of Composition Formation and Properties of Multicomponent and Polycrystalline Materials

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

Deadline for manuscript submissions: closed (20 January 2022) | Viewed by 3238

Special Issue Editors


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Guest Editor
Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, 634021 Tomsk, Russia
Interests: mathematical modeling; irreversible thermodynamics; coupling models; new material synthesis; combustion; filtration; thermal-elastic diffusion

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Guest Editor
Mathematical Simulation of Systems and Processes, Perm National Research Polytechnic University, 614990 Perm, Russia
Interests: crystal plasticity; multilevel model; plasticity; superplasticity; metals; alloys; large strain; phase transformation

Special Issue Information

Dear Colleagues,

Modern technologies for the synthesis of new materials (multicomponent and polycrystalline) are very diverse and are characterized by multifactoriality, non-equilibrium, and multistage. For their development and optimization, detailed studies of a variety of related phenomena, their interaction and influence on synthesis dynamics are required. Experimental study of the composition and structure of synthesized materials is carried out after additional influences and manipulations, which does not always give an idea of the physical processes that led to this or that result. Help can come in the form of mathematical modeling, which currently has a wide range of possibilities from studying processes on the atomic and molecular scale to describing the process as a whole. A good mathematical model should not only describe what is observed, but also have predictive properties. Ideally, the model should tell us what technological conditions are necessary to obtain a material of a given composition and structure, and required to improve the performance characteristics of the product created from this material. Unfortunately, traditional thermodynamics and models of continua mechanics can only be the first step in this direction. Classical models of continua mechanics are restricted by simple structure. Non-equilibrium stages, kinetic phenomena, mutual influence of processes of different nature in different scale, peculiarities of structure, and change of properties during synthesis require development of special models.

Topics of publications may include, but are not limited to, the following:

  • Modeling of the structure formation based on the knowledge of the reaction kinetics under nonequilibrium conditions;
  • Modeling of the structure formation in the synthesis process on the basis of the modern methods;
  • Development of multilevel models of crystal plasticity and models to describe solid-state phase transitions in metals and alloys;
  • Calculation of the effective properties of multicomponent and polycrystallinematerials produced under different conditions;
  • The simulation of the mechanical phenomena accompanying the changes in the composition and structure;
  • Theoretical investigation of the macro-law evolution of the composition and structure in the modern technologies;
  • Studying the regularities of phase formation at the micro-level in the conditions of the modern technologies;
  • Development of the multilevel and multiscale models for the composition and structure formation in the modern technologies;
  • Development of the models for the evolution of the properties with the composition changing in the process of synthesis;
  • Modeling of the melting and crystallization behavior of the multiphase materials;
  • Optimization of the technological process stages of synthesis of new materials on the basis of multiphysics and multilevel models.

Prof. Dr. Anna Georgievna Knyazeva
Prof. Dr. Peter Valentinovich Trusov
Guest Editors

Manuscript Submission Information

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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 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

  • mathematical modeling
  • multilevel models of crystal plasticity
  • materials synthesis
  • multicomponent and polycrystalline materials
  • irreversible conditions
  • chemical reactions
  • solid phase transformation
  • properties formation
  • modern technologies

Published Papers (2 papers)

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Research

17 pages, 6751 KiB  
Article
Numerical Analysis of the Mechanical Response of Two-Phase Nanocomposites Consisting of Nanoporous Gold and Polymer
by Aleksandr Shalimov and Mikhail Tashkinov
Materials 2022, 15(4), 1574; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15041574 - 19 Feb 2022
Viewed by 1385
Abstract
In this work, representative volume elements (RVEs) of composites, consisting of nanoporous gold and polymer, were investigated. Gold is of great interest as a special case of nanoporous metals as it deforms to large plastic strains when compressed, whereas normally nanomaterials allow only [...] Read more.
In this work, representative volume elements (RVEs) of composites, consisting of nanoporous gold and polymer, were investigated. Gold is of great interest as a special case of nanoporous metals as it deforms to large plastic strains when compressed, whereas normally nanomaterials allow only small deformations. The nanocomposite is modeled as a nanoporous monocrystal filled with a polymer. Different models of the phase behavior of nanoporous metal composites with the addition of a polymer component were studied. Three models of the mechanical behavior of gold were implemented: elasticity, elastic-plasticity, and the model of fracture with the degradation of properties. Three types of polymers were considered: polypyrrole (PPy), epoxy resin, and polyaniline (PANI), for which elasticity and elastic-plasticity models were implemented. The effect of the morphology of the nanocomposite on their mechanical response was numerically investigated using finite element analysis. Full article
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17 pages, 3351 KiB  
Article
The Three-Level Elastoviscoplastic Model and Its Application to Describing Complex Cyclic Loading of Materials with Different Stacking Fault Energies
by Peter Valentinovich Trusov and Dmitriy Sergeevich Gribov
Materials 2022, 15(3), 760; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15030760 - 19 Jan 2022
Cited by 6 | Viewed by 1402
Abstract
The development of new technologies for thethermomechanical processing of metals and the improvement of the existing ones would be unattainable without the use of mathematical models. The physical and mechanical properties of alloys and the performance characteristics of the products made of these [...] Read more.
The development of new technologies for thethermomechanical processing of metals and the improvement of the existing ones would be unattainable without the use of mathematical models. The physical and mechanical properties of alloys and the performance characteristics of the products made of these alloys are generally determined by the microstructure of materials. In real manufacturing processes, the deformation of metals and alloys occurs when they undergo complex (non-proportional) loading. Under these conditions, the formation of defect substructures, which do not happen at simple (proportional) loading, can take place. This is due to the occurrence of a great number of slip systems activated under loading along complex strain paths, which leads, for instance, to the more intense formation of barriers of different types, including barriers on split dislocations. In these processes, the formation and annihilation of dislocations proceed actively. In this paper, we present a three-level mathematical model that is based on an explicit description of the evolution dislocations density and the formation of dislocations barriers. The model is intended for the description of arbitrary complex loads with an emphasis on complex cyclic deformation.The model is composed of macrolevel (a representative macrovolume of the material that can be considered as an integration point in the finite-element modeling of real constructions), and mesolevel-1 (description of the mechanical response of a crystallite) and mesolevel-2 (description of the defect structure evolution in a crystallite) submodels. Using the model, we have performed a series of numerical experiments on simple and complex, monotonic and cyclic deformations of materials with different stacking fault energies, analyzed the evolution of defect densities, and analyzed the challenges of a relationship between the complexity of loading processes at a macrolevel and the activation of slip systems at low scale levels. Full article
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