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Plastic deformation of NiMnGa polycrystals
Materials Science and Engineering: A, 2004Ferromagnetic materials based on the Heusler alloy Ni 2 MnGa have been recognized as interesting actuating materials. Large strains can be obtained by applying an external magnetic field acting on the reorientation of the mesoscopic structure of martensite.
Besseghini S +4 more
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On the plastic deformation of superconductors
Journal of Physics F: Metal Physics, 1980In the transition from the normal (n) to the superconducting (s) state the creep rate of metals flowing under constant stress increases while, if deformation occurs at a constant strain-rate, a small drop in the flow stress, △σns, is observed. These “softening” effects have been the subject of an extensive literature in the last few years. The material
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On the Theory of Plastic Deformation [PDF]
Proceedings of the Physical Society. Section A, 1951 A model for plastic deformation in soft metals, i.e. metals which are not age-hardened or severely cold-worked, is given. It is based on the assumption that in real crystals there is always a number of regions present which, by an unknown process, act as sources of dislocations.
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2020
This chapter presents the production of light alloys (Ti-Mg) by severe plastic deformation. Alloys with different Mg content were synthesized by high-pressure torsion straining, technique that allows to obtain ultrafine-grained materials in both equilibrium and nonequilibrium, changing the chemical, thermodynamic, and mechanical properties of the ...
Cesar Augusto Isaza Merino +3 more
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This chapter presents the production of light alloys (Ti-Mg) by severe plastic deformation. Alloys with different Mg content were synthesized by high-pressure torsion straining, technique that allows to obtain ultrafine-grained materials in both equilibrium and nonequilibrium, changing the chemical, thermodynamic, and mechanical properties of the ...
Cesar Augusto Isaza Merino +3 more
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Dynamics of plastic deformation: Waves of localized plastic deformation in solids
Russian Physics Journal, 1992It has been shown here that a localized plastic deformation in structurally inhomogeneous media can be of a wave nature and can propagate in the form of nonlinear plastic waves, not only at the microscopic level but also at the mesoscopic level. It has been established that there is an interrelationship between this new effect and grain-boundary ...
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Localization of Plastic Deformation
Solid State Phenomena, 1991Classification des phenomenes de localisation plastique en instabilites permanentes/transitoires, stationnaires/propageantes. Proposition d'une approche cinetique basee sur l'analyse de la stabilite de l'equation d'evolution de la deformabilite plastique (densite des dislocations X mobilite).
Yves Bréchet, François Louchet
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On plastic deformation of soils
International Journal of Plasticity, 1988Abstract In the frame of the geometrically linear theory, constitutive equations for granular soils are developed. They allow the description of the plastic behavior of soils in the hardening phase and in the critical state. Compression, extension, and dilatancy are included in the constitutive relations.
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The inhomogeneity of plastic deformation
Czechoslovak Journal of Physics, 1985Considerable local strain differences occur in single crystals as a consequence of slip bands. A significant contribution to this phenomenon is the effect of the deformation rate on the inhomogeneity of its distribution. In polycrystalline materials the plastic deformation is affected by grain boundaries and their vicinity as well as by various ...
V. Kafka, Vl. Sedláček
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Plastic Deformation Structures
2004AbstractMicrostructure and crystallographic texture are the key material features used in the continuous endeavor to relate the processing of a metal with its final properties. This article emphasizes several aspects of deformation microstructures, namely, microstructural evolution, dislocation boundaries, and macroscopic properties. It discusses three
Niels Hansen, D.A. Hughes
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Plastic deformation of polypropylene
Polymer, 1986Abstract The heats of fusion of drawn polypropylene at different draw temperatures (ranging from 22°C–140°C) and draw rates (ranging from 0.05 cm min−1 to 50 cm min−1) were determined to establish the plastic deformation mechanism of polypropylene. At draw ratio λ = 6 and a draw rate Rd = 0.5 cm min−1 the heat of fusion of drawn polypropylene is a ...
T.D. Juska, Ian R. Harrison, Tuomin Liu
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