TY  - CONF
AU  - Čevizović, Dalibor
AU  - Reshetnyak, Alexander A.
AU  - Sharkeev, Yurii P.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8664
AB  - We elaborate the recently introduced theory of flow stress, including yield strength, in polycrystalline materials under quasi-static plastic deformations, thereby extending the case of single-mode aggregates to multimodal ones in the framework of a two-phase model which is characterized by the presence of crystalline and grain-boundary phases. Both analytic and graphic forms of the generalized Hall-Petch relations are obtained for multimodal samples with BCC (α-phase Fe), FCC (Cu, Al, Ni) and HCP (α-Ti, Zr) crystalline lattices at T=300K with different values of the grain-boundary (second) phase. The case of dispersion hardening due to a natural incorporation into the model of a third phase including additional particles of doping materials is considered. The maximum of yield strength and the respective extremal grain size of samples are shifted by changing both the input from different grain modes and the values at the second and third phases. We study the influence of multimodality and dispersion hardening on the temperature-dimensional effect for yield strength within the range of 100-350K. © 2019 Author(s).
C3  - AIP Conference Proceedings
T1  - Towards a theory of flow stress in multimodal polycrystalline aggregates. Effects of dispersion hardening
VL  - 2167
SP  - 020047
DO  - 10.1063/1.5131914
ER  - 

@conference{
author = "Čevizović, Dalibor and Reshetnyak, Alexander A. and Sharkeev, Yurii P.",
year = "2019",
abstract = "We elaborate the recently introduced theory of flow stress, including yield strength, in polycrystalline materials under quasi-static plastic deformations, thereby extending the case of single-mode aggregates to multimodal ones in the framework of a two-phase model which is characterized by the presence of crystalline and grain-boundary phases. Both analytic and graphic forms of the generalized Hall-Petch relations are obtained for multimodal samples with BCC (α-phase Fe), FCC (Cu, Al, Ni) and HCP (α-Ti, Zr) crystalline lattices at T=300K with different values of the grain-boundary (second) phase. The case of dispersion hardening due to a natural incorporation into the model of a third phase including additional particles of doping materials is considered. The maximum of yield strength and the respective extremal grain size of samples are shifted by changing both the input from different grain modes and the values at the second and third phases. We study the influence of multimodality and dispersion hardening on the temperature-dimensional effect for yield strength within the range of 100-350K. © 2019 Author(s).",
journal = "AIP Conference Proceedings",
title = "Towards a theory of flow stress in multimodal polycrystalline aggregates. Effects of dispersion hardening",
volume = "2167",
pages = "020047",
doi = "10.1063/1.5131914"
}

Čevizović, D., Reshetnyak, A. A.,& Sharkeev, Y. P.. (2019). Towards a theory of flow stress in multimodal polycrystalline aggregates. Effects of dispersion hardening. in AIP Conference Proceedings, 2167, 020047.
https://doi.org/10.1063/1.5131914

Čevizović D, Reshetnyak AA, Sharkeev YP. Towards a theory of flow stress in multimodal polycrystalline aggregates. Effects of dispersion hardening. in AIP Conference Proceedings. 2019;2167:020047.
doi:10.1063/1.5131914 .

Čevizović, Dalibor, Reshetnyak, Alexander A., Sharkeev, Yurii P., "Towards a theory of flow stress in multimodal polycrystalline aggregates. Effects of dispersion hardening" in AIP Conference Proceedings, 2167 (2019):020047,
https://doi.org/10.1063/1.5131914 . .