The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform

Rajat Banerjee - One of the best experts on this subject based on the ideXlab platform.

  • cushioning effect enhanced Localized Plastic Flow and thermal transport in swcnt lead silicate glass composite
    Chemical Physics Letters, 2012
    Co-Authors: Sudipta Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    Abstract Here we report enhanced hardness, fracture toughness and thermal conductivity of single walled carbon nanotubes (SWCNT) embedded lead silicate glass composite. The enhanced hardness of the composite was due to cushioning behavior of the agglomerated SWCNT bundles where as the increment in toughness is due to crack bridging and accumulation of SWCNT bundles around the crack zone. Interestingly the accumulation of SWCNT bundles which was hitherto not yet been observed was due to enhanced Localized Plastic Flow in the composite. Moreover, moderate increment of thermal conductivity above room temperature was discussed in the context of interfacial thermal resistance.

  • Cushioning effect, enhanced Localized Plastic Flow and thermal transport in SWCNT–lead silicate glass composite
    Chemical Physics Letters, 2012
    Co-Authors: Sudipta Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    Abstract Here we report enhanced hardness, fracture toughness and thermal conductivity of single walled carbon nanotubes (SWCNT) embedded lead silicate glass composite. The enhanced hardness of the composite was due to cushioning behavior of the agglomerated SWCNT bundles where as the increment in toughness is due to crack bridging and accumulation of SWCNT bundles around the crack zone. Interestingly the accumulation of SWCNT bundles which was hitherto not yet been observed was due to enhanced Localized Plastic Flow in the composite. Moreover, moderate increment of thermal conductivity above room temperature was discussed in the context of interfacial thermal resistance.

  • enhanced mechanical properties of single walled carbon nanotube borosilicate glass composite due to cushioning effect and Localized Plastic Flow
    AIP Advances, 2011
    Co-Authors: Sujan Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    A borosilicate glass composite has been fabricated incorporating Single Wall Carbon Nanotubes (SWCNT) in the glass matrix by melt-quench technique. Hardness and the fracture toughness of the composite, were found to increase moderately with respect to the base glass. Interestingly one can observe accumulation of SWCNT bundles around the crack zone though no such accumulation was observed in the crack free indentation zone. The enhanced hardness of the composite was discussed by correlating the cushioning as well as toughening behavior of the agglomerated SWCNT bundles. On the other hand enhanced Plastic Flow was proposed to be the prime reason for the accumulation of SWCNT bundles around the crack, which increases the toughness of the composite by reducing the crack length. Moreover to ascertain the enhanced Plasticity of the composite than that of the glass we calculated the recovery resistance of glass and the composite where recovery resistance of composite was found to be higher than that of the glass.

Svetlana A. Barannikova - One of the best experts on this subject based on the ideXlab platform.

  • Autowave Plasticity: Principles and Possibilities
    Technical Physics, 2020
    Co-Authors: L. B. Zuev, Svetlana A. Barannikova
    Abstract:

    Basic concepts of the autowave model of development of a Localized Plastic Flow of solids of different natures are considered. It is shown that Plastic deformation develops in a Localized (at the macroscale level) way throughout the process. The form of the observed localization patterns is related to stages of strain hardening of the material. The patterns are projections of different modes of the Localized Plastic Flow autowave on the observation surface. An elastoPlastic strain invariant is introduced, which is considered as the main equation of the autowave Plasticity model, and its physical nature is discussed.

  • Hall–Petch Relation and the Localized Plasticity Parameters
    Russian Metallurgy (Metally), 2020
    Co-Authors: Lev B. Zuev, Svetlana A. Barannikova
    Abstract:

    The mechanical properties and the Localized Plasticity characteristics of polycrystalline aluminum are compared to explain the nature of the Hall–Petch relation for the deformation of a polycrystalline metal in two grain size ranges. The Hall–Petch relation for the Flow stress is shown to be related to an elastoPlastic deformation invariant, which unites the characteristics of elastic deformation and Localized Plastic Flow.

  • Basic Relationships of the Autowave Model of a Plastic Flow
    Russian Physics Journal, 2018
    Co-Authors: Lev B. Zuev, Svetlana A. Barannikova, A. G. Lunev, S. V. Kolosov, A. M. Zharmukhambetova
    Abstract:

    Macroscopic laws of the development of Plastic Flow localization autowaves in metals, alloys, alkali halide crystals, and rocks are investigated. It is shown that the characteristics of elastic and Plastic waves form an elastoPlastic invariant. The nature of the invariant is explained, and it is demonstrated that its existence is determined by changes in the entropy of a deformable system in the process of generation of Localized Plastic Flow autowaves. It has been established that the main features of the deformation and deformation hardening processes can be considered as a consequence of the elastoPlastic invariant.

  • Autowave process of the Localized Plastic deformation of high-chromium steel saturated with hydrogen
    Journal of Physics: Conference Series, 2016
    Co-Authors: Anna Bochkareva, Svetlana A. Barannikova, Yu V Li, Alexey Lunev, L. B. Zuev
    Abstract:

    The deformation behavior of high-chromium stainless steel of sorbitic structure upon high-temperature tempering and of electrically saturated with hydrogen in the electrochemical cell during 12 hours is investigated. The stress-strain curves for each state were obtained. From the stress-strain curves, one can conclude that hydrogen markedly reduces the elongation to the fracture of specimen. Using double-exposed speckle photography method it was found that the Plastic Flow of the material is of a Localized character. The pattern distribution of Localized Plastic Flow domains at the linear hardening stage was investigated. Comparative study of autowave parameters was carried out for the tempered steel as well as the electrically saturated with hydrogen steel.

  • experimental study of Plastic Flow macro scale localization process pattern propagation rate dispersion
    International Journal of Mechanical Sciences, 2014
    Co-Authors: Svetlana A. Barannikova, L. B. Zuev
    Abstract:

    Abstract The localization behavior of Plastic Flow was investigated for a range of pure metals and alloys. The Localized Plastic Flow is regarded as an autowave process having a fixed set of features, i.e. propagation rate, wave number and dispersion law. Using the method of speckle photography, the autowave propagation rate has been determined experimentally for the stage of linear work hardening. Moreover, a dispersion relation of quadratic form and wave number dependencies of phase and group rates have been derived for Localized Plastic Flow autowaves. A detailed quantitative comparison is made of the phase and group rates of the autowaves. This suggests that the two types of wave rates are closely related.

Sudipta Ghosh - One of the best experts on this subject based on the ideXlab platform.

  • cushioning effect enhanced Localized Plastic Flow and thermal transport in swcnt lead silicate glass composite
    Chemical Physics Letters, 2012
    Co-Authors: Sudipta Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    Abstract Here we report enhanced hardness, fracture toughness and thermal conductivity of single walled carbon nanotubes (SWCNT) embedded lead silicate glass composite. The enhanced hardness of the composite was due to cushioning behavior of the agglomerated SWCNT bundles where as the increment in toughness is due to crack bridging and accumulation of SWCNT bundles around the crack zone. Interestingly the accumulation of SWCNT bundles which was hitherto not yet been observed was due to enhanced Localized Plastic Flow in the composite. Moreover, moderate increment of thermal conductivity above room temperature was discussed in the context of interfacial thermal resistance.

  • Cushioning effect, enhanced Localized Plastic Flow and thermal transport in SWCNT–lead silicate glass composite
    Chemical Physics Letters, 2012
    Co-Authors: Sudipta Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    Abstract Here we report enhanced hardness, fracture toughness and thermal conductivity of single walled carbon nanotubes (SWCNT) embedded lead silicate glass composite. The enhanced hardness of the composite was due to cushioning behavior of the agglomerated SWCNT bundles where as the increment in toughness is due to crack bridging and accumulation of SWCNT bundles around the crack zone. Interestingly the accumulation of SWCNT bundles which was hitherto not yet been observed was due to enhanced Localized Plastic Flow in the composite. Moreover, moderate increment of thermal conductivity above room temperature was discussed in the context of interfacial thermal resistance.

Lev B. Zuev - One of the best experts on this subject based on the ideXlab platform.

  • Hall–Petch Relation and the Localized Plasticity Parameters
    Russian Metallurgy (Metally), 2020
    Co-Authors: Lev B. Zuev, Svetlana A. Barannikova
    Abstract:

    The mechanical properties and the Localized Plasticity characteristics of polycrystalline aluminum are compared to explain the nature of the Hall–Petch relation for the deformation of a polycrystalline metal in two grain size ranges. The Hall–Petch relation for the Flow stress is shown to be related to an elastoPlastic deformation invariant, which unites the characteristics of elastic deformation and Localized Plastic Flow.

  • Basic Relationships of the Autowave Model of a Plastic Flow
    Russian Physics Journal, 2018
    Co-Authors: Lev B. Zuev, Svetlana A. Barannikova, A. G. Lunev, S. V. Kolosov, A. M. Zharmukhambetova
    Abstract:

    Macroscopic laws of the development of Plastic Flow localization autowaves in metals, alloys, alkali halide crystals, and rocks are investigated. It is shown that the characteristics of elastic and Plastic waves form an elastoPlastic invariant. The nature of the invariant is explained, and it is demonstrated that its existence is determined by changes in the entropy of a deformable system in the process of generation of Localized Plastic Flow autowaves. It has been established that the main features of the deformation and deformation hardening processes can be considered as a consequence of the elastoPlastic invariant.

  • Using a crystal as a universal generator of Localized Plastic Flow autowaves
    Bulletin of the Russian Academy of Sciences: Physics, 2014
    Co-Authors: Lev B. Zuev
    Abstract:

    Patterns accompanying the development of a Localized Plastic Flow in solids are considered. A correlation between products of the linear and rate parameters of elastic and Plastic Flows is revealed by analyzing Localized Plastic Flows in metals and nonmetals. A relationship between the parameters of elasticity and Plastic Flow is hypothesized. A relationship between patterns in Plastic Flow and quantum-mechanical parameters is found.

  • Localized Plastic Flow autowaves and the hall petch relation for al
    Key Engineering Materials, 2013
    Co-Authors: Lev B. Zuev, Natalya Zarikovskaya
    Abstract:

    The localization of Plastic deformation was examined for polycrystalline aluminum samples having grain sizes in the range from 8·10-3to 10 mm. It is found that the length of Localized deformation autowaves is determined by the grain size of material. The Localized Plastic Flow patterns emergent in the polycrystalline aluminum samples are found to be connected to the Hall-Petch relation. Two types of Flow stress dependencies of grain size are distinguished.

  • significant correlation between macroscopic and microscopic parameters for the description of Localized Plastic Flow auto waves in deforming alloys
    Solid State Communications, 2012
    Co-Authors: Lev B. Zuev, Svetlana A. Barannikova, A V Ponomareva, Yu Kh Vekilov, Igor A Abrikosov
    Abstract:

    Understanding of mechanical properties of materials and a possibility to predicting them from ab initio calculations have fundamental importance for solid state theory. In this work we establish a significant correlation between the product of the macroscopic parameters of Localized Plastic Flow auto-waves in deforming alloys, their length and propagation rate and the product of the microscopic (lattice) parameters of these materials, the spacing between close-packed planes of the lattice and the rate of transverse elastic waves. Thus, these products can be regard as invariants of Plastic and elastic deformation processes, respectively. Moreover, the established regularity suggests that the elastic and the Plastic processes simultaneously involved in the deformation are closely related. Our work also demonstrates that ab initio simulations can be used for the prediction of parameters of Localized Plastic Flow auto-waves in deforming alloys.

Arnab Ghosh - One of the best experts on this subject based on the ideXlab platform.

  • cushioning effect enhanced Localized Plastic Flow and thermal transport in swcnt lead silicate glass composite
    Chemical Physics Letters, 2012
    Co-Authors: Sudipta Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    Abstract Here we report enhanced hardness, fracture toughness and thermal conductivity of single walled carbon nanotubes (SWCNT) embedded lead silicate glass composite. The enhanced hardness of the composite was due to cushioning behavior of the agglomerated SWCNT bundles where as the increment in toughness is due to crack bridging and accumulation of SWCNT bundles around the crack zone. Interestingly the accumulation of SWCNT bundles which was hitherto not yet been observed was due to enhanced Localized Plastic Flow in the composite. Moreover, moderate increment of thermal conductivity above room temperature was discussed in the context of interfacial thermal resistance.

  • Cushioning effect, enhanced Localized Plastic Flow and thermal transport in SWCNT–lead silicate glass composite
    Chemical Physics Letters, 2012
    Co-Authors: Sudipta Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    Abstract Here we report enhanced hardness, fracture toughness and thermal conductivity of single walled carbon nanotubes (SWCNT) embedded lead silicate glass composite. The enhanced hardness of the composite was due to cushioning behavior of the agglomerated SWCNT bundles where as the increment in toughness is due to crack bridging and accumulation of SWCNT bundles around the crack zone. Interestingly the accumulation of SWCNT bundles which was hitherto not yet been observed was due to enhanced Localized Plastic Flow in the composite. Moreover, moderate increment of thermal conductivity above room temperature was discussed in the context of interfacial thermal resistance.

  • enhanced mechanical properties of single walled carbon nanotube borosilicate glass composite due to cushioning effect and Localized Plastic Flow
    AIP Advances, 2011
    Co-Authors: Sujan Ghosh, Arnab Ghosh, Rajat Banerjee
    Abstract:

    A borosilicate glass composite has been fabricated incorporating Single Wall Carbon Nanotubes (SWCNT) in the glass matrix by melt-quench technique. Hardness and the fracture toughness of the composite, were found to increase moderately with respect to the base glass. Interestingly one can observe accumulation of SWCNT bundles around the crack zone though no such accumulation was observed in the crack free indentation zone. The enhanced hardness of the composite was discussed by correlating the cushioning as well as toughening behavior of the agglomerated SWCNT bundles. On the other hand enhanced Plastic Flow was proposed to be the prime reason for the accumulation of SWCNT bundles around the crack, which increases the toughness of the composite by reducing the crack length. Moreover to ascertain the enhanced Plasticity of the composite than that of the glass we calculated the recovery resistance of glass and the composite where recovery resistance of composite was found to be higher than that of the glass.