Mechanisms of structural evolution of laminates with immiscible components under high-pressure torsion

Mazilkin, A.; Tavakkoli, V.; Davydenko, O.; Beygelzimer, Y.; Boltynjuk, E.; Boll, T.; Straumal, B.; Baretzky, B.; Estrin, Y.; Kulagin, R.

doi:10.1016/j.actamat.2024.119804

Acta Materialia

2024

DOI: 10.1016/j.actamat.2024.119804

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Mechanisms of structural evolution of laminates with immiscible components under high-pressure torsion

A. Mazilkin,

V. Tavakkoli,

O. Davydenko

et al.

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2024

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Cited by 3 publications

References 80 publications

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Co‐Deformation in Severely Deformed Multiphase Crystalline Metallic Systems: Physical Mechanisms, Intrinsic Limitations, and Perspectives

Sauvage

2024

Adv Eng Mater

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The deformation of multiphase metallic alloys or metal matrix composites by forming processes such as rolling or drawing requires the co‐deformation of phases. Severe plastic deformation processes have extended possibilities with the ability to produce unique nanoscaled structures through the formation of strain‐induced super‐saturated solid solutions, the fragmentation of second‐phase particles, or ultimate co‐deformation down to the nanoscale. Based on various examples, the fundamental mechanisms of co‐deformation are addressed. Parameters that promote the extension of existing heterophase boundaries are discussed, and some possible atomic‐scale mechanisms involving dislocation activities based on geometrical and energetic considerations are proposed. Finally, the physical limits of co‐deformation are considered before suggesting research directions that might be followed to develop fundamental knowledge and applications in the field.

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Co‐Deformation in Severely Deformed Multiphase Crystalline Metallic Systems: Physical Mechanisms, Intrinsic Limitations, and Perspectives

Sauvage

2024

Adv Eng Mater

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Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review

Edalati,

Ahmed,

Akrami

et al. 2024

Journal of Alloys and Compounds

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Geometry of plastic deformation in metals as piecewise isometric transformations

Beygelzimer,

Filippov,

Orlov

2024

Sci Rep

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Deformation mechanisms of crystalline solids has been the subject of research for more than two centuries. The theory of dislocations dominates modern views but still has significant gaps demanding the introduction of additional concepts for the coherent quantitative description of physical phenomena. In this work, we propose a coherent geometric description of motion and deformation in crystalline solids as piecewise isometric transformations (PWIT). The latter only includes operations that, similar to interatomic spacing in crystalline lattice, do not alter distances between reference points, i.e. translations, rotations and mirror reflections. The difference between solid-body translations and plastic deformations is that the isometric transformations have discontinuities that in real-life materials realise through dislocations (termination of shifts), disclinations (termination of rotations), and twins (mirror reflections). The conceptual description of plastic deformations as PWIT can be useful for the better description of physical phenomena, proposing new hypothesis, and for developing predictive analytical models. In this paper, the use of this conceptual description enables proposing new hypothesis about the nature of such interesting phenomena in severe plastic deformation as (i) stationary ‘solid state turbulence’ stage in high pressure torsion, and (ii) rate of mass transfer (mechanically assisted diffusion) in simple-shear deformation.

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Mechanisms of structural evolution of laminates with immiscible components under high-pressure torsion

Cited by 3 publications

References 80 publications

Co‐Deformation in Severely Deformed Multiphase Crystalline Metallic Systems: Physical Mechanisms, Intrinsic Limitations, and Perspectives

Co‐Deformation in Severely Deformed Multiphase Crystalline Metallic Systems: Physical Mechanisms, Intrinsic Limitations, and Perspectives

Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review

Geometry of plastic deformation in metals as piecewise isometric transformations

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