Two-phase model of the polycrystalline aggregate with account for grain-boundary states under quasi-static deformation

A. A. Reshetnyak, Yu P. Sharkeev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The recently suggested statistical theory of flow stress, including yield strength, for polycrystalline materials under quasi-static plastic deformation is developed in the framework of a two-phase model. Analytic and graphic forms of the generalized Hall-Petch relations are obtained for samples with BCC (α-phase Fe), FCC (Cu, Al, Ni) and HCP (α-Ti, Zr) crystalline lattices at T = 300 K with different values of grain-boundary (second) phase. The maximum of yield strength and respective extremal grain size of the samples are shifted by changing of the second phase. Temperature dependence in the range of 100-350 K for yield strength (using the example of Al) revealed its increase for closely packed nanocrystalline samples with the growth of temperature. An enlargement of the second phase in a sample neutralizes this property.

Original languageEnglish
Title of host publicationProceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures
EditorsVasily M. Fomin, Victor E. Panin, Sergey G. Psakhie
PublisherAmerican Institute of Physics Inc.
Volume2051
ISBN (Electronic)9780735417779
DOIs
Publication statusPublished - 12 Dec 2018
EventInternational Symposium on Hierarchical Materials: Development and Applications for New Technologies and Reliable Structures 2018 - Tomsk, Russian Federation
Duration: 1 Oct 20185 Oct 2018

Conference

ConferenceInternational Symposium on Hierarchical Materials: Development and Applications for New Technologies and Reliable Structures 2018
CountryRussian Federation
CityTomsk
Period1.10.185.10.18

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Reshetnyak, A. A., & Sharkeev, Y. P. (2018). Two-phase model of the polycrystalline aggregate with account for grain-boundary states under quasi-static deformation. In V. M. Fomin, V. E. Panin, & S. G. Psakhie (Eds.), Proceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures (Vol. 2051). [020251] American Institute of Physics Inc.. https://doi.org/10.1063/1.5083494