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Metallurgy by Severe Plastic Deformation
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Metallurgy by Severe Plastic Deformation

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (20 May 2023) | Viewed by 4794

Special Issue Editors

Prof. Dr. Laszlo S. Toth

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Guest Editor
1. Laboratory of Excellence on Design of Alloy Metals for Low-Mass Structures, Lorraine University, Metz-Nancy, France
2. Institute of Physical Metallurgy, Metalforming and Nanotechnology, University of Miskolc, Miskolc, Hungary
Interests: mechanics of materials; polycrystal plasticity; crystallographic texture; strain hardening; nanomaterials by severe plastic deformation; multilevel modeling
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hyoung Seop Kim

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
Interests: mechanics of materials; multiscale constitutive modeling; finite element analyses; nanostructured materials; severe plastic deformation; high-entropy alloy; metal additive manufacturing; architectured materials; heterostructured materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Severe plastic deformation (SPD) has become a well-established mechanical metallurgy process to improve the mechanical/physical/chemical properties of metals. The first experiments in the field were conducted by Bridgman using high-pressure torsion (HPT), and they were so successful that they led to a Nobel prize in 1946. The field has advanced continuously since then, and in the last 30 years in particular, new SPD experimental techniques have emerged, leading to the establishment of a new research field called SPD. SPD is an efficient and inexpensive way to improve material strength via the extreme grain fragmentation process that takes place due to the severe plastic deformation imposed on the metal. Ultra-fine grain sizes (below 1 μm) can be reached in pure metals, and even nano-grain sizes are obtained in alloyed metals. Indeed, due to the extremely small grain sizes, the theoretical limit is approached in the strength of SPD processed metals.

The present Special Issue aims to compile the state of the art in the field of SPD research through high-level papers, proposed by excellent research groups active in the field of SPD. The main aim is to show that SPD processes are able to change the metallurgical state of metals, so it should be recognized as an efficient process to perform metallurgical transformations in metals. All fields of SPD research are included—experimental as well as simulation/modeling. Propositions are especially expected to solve the two main problems of SPD materials: low formability and low thermal stability of the microstructures, which currently represent the price to pay for the extremely high elastic limits in metals that undergo SPD.

Prof. Dr. Laszlo S. Toth
Prof. Dr. Hyoung Seop Kim
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

  • severe plastic deformation (SPD)
  • metallurgical evolutions induced by SPD
  • new SPD techniques
  • characterization of SPD materials
  • ultra-fine-grained structure
  • thermal stability of SPD materials
  • phase transformations
  • grain refinement
  • superplasticity
  • light weighting by SPD
  • SPD for hydrogen storage
  • surface SPD
  • multi-scale modelling of SPD
  • architecturing by SPD
  • gradient structures obtained by SPD

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Published Papers (3 papers)

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Research

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14 pages, 8133 KiB  
Article
Can Severe Plastic Deformation Tune Nanocrystallization in Fe-Based Metallic Glasses?
by Monika Antoni, Florian Spieckermann, Niklas Plutta, Christoph Gammer, Marlene Kapp, Parthiban Ramasamy, Christian Polak, Reinhard Pippan, Michael J. Zehetbauer and Jürgen Eckert
Materials 2023, 16(3), 1260; https://doi.org/10.3390/ma16031260 - 1 Feb 2023
Cited by 2 | Viewed by 1700
Abstract
The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on the structural properties of the two iron-based metallic glasses Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P [...] Read more.
The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on the structural properties of the two iron-based metallic glasses Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P4Cu0.8 have been investigated and compared. While for Fe73.9Cu1Nb3Si15.5B6.6, HPT processing allows us to extend the known consolidation and deformation ranges, HPT processing of Fe81.2Co4Si0.5B9.5P4Cu0.8 for the first time ever achieves consolidation and deformation with a minimum number of cracks. Using numerous analyses such as X-ray diffraction, dynamic mechanical analyses, and differential scanning calorimetry, as well as optical and transmission electron microscopy, clearly reveals that Fe81.2Co4Si0.5B9.5P4Cu0.8 exhibits HPT-induced crystallization phenomena, while Fe73.9Cu1Nb3Si15.5B6.6 does not crystallize even at the highest HPT-deformation degrees applied. The reasons for these findings are discussed in terms of differences in the deformation energies expended, and the number and composition of the individual crystalline phases formed. The results appear promising for obtaining improved magnetic properties of glassy alloys without additional thermal treatment. Full article
(This article belongs to the Special Issue Metallurgy by Severe Plastic Deformation)
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Review

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18 pages, 6970 KiB  
Review
Superfunctional Materials by Ultra-Severe Plastic Deformation
by Kaveh Edalati
Materials 2023, 16(2), 587; https://doi.org/10.3390/ma16020587 - 7 Jan 2023
Cited by 12 | Viewed by 2841
Abstract
Superfunctional materials are defined as materials with specific properties being superior to the functions of engineering materials. Numerous studies introduced severe plastic deformation (SPD) as an effective process to improve the functional and mechanical properties of various metallic and non-metallic materials. Moreover, the [...] Read more.
Superfunctional materials are defined as materials with specific properties being superior to the functions of engineering materials. Numerous studies introduced severe plastic deformation (SPD) as an effective process to improve the functional and mechanical properties of various metallic and non-metallic materials. Moreover, the concept of ultra-SPD—introducing shear strains over 1000 to reduce the thickness of sheared phases to levels comparable to atomic distances—was recently utilized to synthesize novel superfunctional materials. In this article, the application of ultra-SPD for controlling atomic diffusion and phase transformation and synthesizing new materials with superfunctional properties is discussed. The main properties achieved by ultra-SPD include: (i) high-temperature thermal stability in new immiscible age-hardenable aluminum alloys; (ii) room-temperature superplasticity for the first time in magnesium and aluminum alloys; (iii) high strength and high plasticity in nanograined intermetallics; (iv) low elastic modulus and high hardness in biocompatible binary and high-entropy alloys; (v) superconductivity and high strength in the Nb-Ti alloys; (vi) room-temperature hydrogen storage for the first time in magnesium alloys; and (vii) superior photocatalytic hydrogen production, oxygen production, and carbon dioxide conversion on high-entropy oxides and oxynitrides as a new family of photocatalysts. Full article
(This article belongs to the Special Issue Metallurgy by Severe Plastic Deformation)
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19 pages, 10736 KiB  
Review
Structure Refinement and Fragmentation of Precipitates under Severe Plastic Deformation: A Review
by Boris B. Straumal, Roman Kulagin, Leonid Klinger, Eugen Rabkin, Petr B. Straumal, Olga A. Kogtenkova and Brigitte Baretzky
Materials 2022, 15(2), 601; https://doi.org/10.3390/ma15020601 - 14 Jan 2022
Cited by 24 | Viewed by 2231
Abstract
During severe plastic deformation (SPD), the processes of lattice defect formation as well as their relaxation (annihilation) compete with each other. As a result, a dynamic equilibrium is established, and a steady state is reached after a certain strain value. Simultaneously, other kinetic [...] Read more.
During severe plastic deformation (SPD), the processes of lattice defect formation as well as their relaxation (annihilation) compete with each other. As a result, a dynamic equilibrium is established, and a steady state is reached after a certain strain value. Simultaneously, other kinetic processes act in opposite directions and also compete with each other during SPD, such as grain refinement/growth, mechanical strengthening/softening, formation/decomposition of solid solution, etc. These competing processes also lead to dynamic equilibrium and result in a steady state (saturation), albeit after different strains. Among these steady-state phenomena, particle fragmentation during the second phase of SPD has received little attention. Available data indicate that precipitate fragmentation slows down with increasing strain, though saturation is achieved at higher strains than in the case of hardness or grain size. Moreover, one can consider the SPD-driven nanocrystallization in the amorphous phase as a process that is opposite to the fragmentation of precipitates. The size of these crystalline nanoprecipitates also saturates after a certain strain. The fragmentation of precipitates during SPD is the topic of this review. Full article
(This article belongs to the Special Issue Metallurgy by Severe Plastic Deformation)
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