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纳米力学科学与技术:国际期刊

每年出版 4 

ISSN 打印: 2572-4258

ISSN 在线: 2572-4266

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.7 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00023 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.11 SJR: 0.244 SNIP: 0.521 CiteScore™:: 3.6 H-Index: 14

Indexed in

CALCULATION OF THE INTERGRANULAR ENERGY IN TWO-LEVEL PHYSICAL MODELS FOR DESCRIBING THERMOMECHANICAL PROCESSING OF POLYCRYSTALS WITH ACCOUNT FOR DISCONTINUOUS DYNAMIC RECRYSTALLIZATION

卷 7, 册 2, 2016, pp. 107-122
DOI: 10.1615/NanomechanicsSciTechnolIntJ.v7.i2.20
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摘要

Many of the existing constructions and parts from metals and alloys, used in various fields of technology and industry, undergo thermomechanical processing. This allows forming a grained and defect (internal) structure of the material in order to obtain the desired physical and mechanical properties. As a consequence, simulation of evolution of the internal structure of metals during plastic treatment at different temperatures is a relevant problem. For this purpose, the most advanced is the approach based on multilevel simulation and physical theories of plasticity, which explicitly describe the mechanisms of inelastic deformation and their carriers, as well as the processes that accompany plastic deformation. This approach includes two classes of models, namely, direct and statistical models. Statistical models consider the representative macrovolume of material (macropoint) as an aggregate of individual crystallites, combined in a polycrystal by the hypothesis of equality of strains (Voigt) or stresses (Reuss). Direct models are divided into two types. The first type of models considers explicitly the grain structure of the material and is applied only to the calculation of a small number of grains of the representative volume, given the existing computational restrictions. The second type of models is "hybrid" and uses numerical methods (for instance FEM). In this case, each point of integration is assigned a finite set of crystallites and polycrystalline aggregate response is determined using a statistical model. The purpose of the work is to create a two-level statistical model to describe the inelastic deformation of the representative volume of the polycrystal in a wide range of temperatures. The developed model can be integrated into a direct model of the second type. Elevated temperatures of deformation lead to the activation of the elastic stress relaxation processes, i.e., dynamic recovery and dynamic recrystallization. The first process occurs due to reconstruction of dislocation substructures; the description of the second process requires consideration of changes in the morphology and structure of the grains and their boundaries. In the present paper we consider the approach to the description of discontinuous dynamic recrystallization, which is based on the mechanism of the movement of the initially existing polycrystal boundaries. To solve this problem the Bailey-Hirsch criterion is used. This criterion is based on comparing the difference between the energy stored in the neighboring grains and the surface energy of the boundary between them. The method for determining the grain boundary energy is the basis of the Schober-Balbuffi ratio and the modified model of coincidence site lattice. The results are compared with experimental data and allow judging about the applicability of this approach to the problem.

对本文的引用
  1. Kondratev N. S., Trusov P. V., Influence of orientation grain facets on the migration velocity of high-angle boundaries, 1909, 2017. Crossref

  2. Trusov P. V., Kondratyev N. S., Two-Level Elastoviscoplastic Model: An Application to the Analysis of Grain Structure Evolution under Static Recrystallization, Physical Mesomechanics, 22, 3, 2019. Crossref

  3. Kondratev N. S., Trusov P. V., Makarevich E. S., Determination of the grain boundary facets orientation in new recrystallized grains, 2051, 2018. Crossref

  4. Trusov P. V., Kondratev N. S., Yanz A. Yu., A Model for Static Recrystallization through Strain-Induced Boundary Migration, Physical Mesomechanics, 23, 2, 2020. Crossref

  5. Trusov P. V., Shveykin A. I., Kondratyev N. S., Yants A. Yu., Multilevel Models in Physical Mesomechanics of Metals and Alloys: Results and Prospects, Physical Mesomechanics, 24, 4, 2021. Crossref

  6. Kanakin V.S., Smirnov A.S., Konovalov A.V., Neural network modeling of the flow stress of the AlMg6/10% SiC metal matrix composite under deformation at high temperatures, Procedia Structural Integrity, 40, 2022. Crossref

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