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Fizika Tverdogo Tela, 2019, Volume 61, Issue 2, Pages 288–295
DOI: https://doi.org/10.21883/FTT.2019.02.47128.255
(Mi ftt8919)
 

This article is cited in 4 scientific papers (total in 4 papers)

Mechanical properties, strength physics and plasticity

Mechanism of influence of nanocrystal sizes on the parameters of the curves of the pseudoelastic and thermoelastic deformations of alloys with the shape memory effect

G. A. Malygin

Ioffe Institute, St. Petersburg
Full-text PDF (143 kB) Citations (4)
Abstract: The data available in the literature on the influence of the nanocrystal sizes of alloys with the shape memory effect on the parameters of the curves of their pseudoelastic and thermoelastic deformation are analyzed in the framework of the theory of diffuse martensitic transitions (DMT). The peculiarity of the DMT theory is that it is based on both thermodynamic and kinetic relationships that make it sensitive to the alloy structure on the mesoscopic scale. This enables one to state the functional dependence of the parameter of the martensitic deformation of the nanocrystals on the size of their cross section $D$. As a result of the analysis, it is found that the coefficient of the strain (martensitic) hardening and the hysteresis of the pseudoelastic strain curves of submicrocrystals of the Ni$_{54}$Fe$_{19}$Ga$_{27}$ are changed with $D$ by law $1/D^2$. The temperature range $(M_s-M_f)$ of the martensitic transition in TiNi alloy nanocrystals is changed by analogy law. These dependences are results of the constrained displacement of dislocations of the phase transformation by transverse sizes of the crystal. A kinetic mechanism of the appearance of the critical nanocrystal size $D_k$ is established; the transition of austenite to martensite does not occur at transverse crystal sizes smaller than the critical size.
Received: 18.09.2018
English version:
Physics of the Solid State, 2019, Volume 61, Issue 2, Pages 149–156
DOI: https://doi.org/10.1134/S1063783419020173
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: G. A. Malygin, “Mechanism of influence of nanocrystal sizes on the parameters of the curves of the pseudoelastic and thermoelastic deformations of alloys with the shape memory effect”, Fizika Tverdogo Tela, 61:2 (2019), 288–295; Phys. Solid State, 61:2 (2019), 149–156
Citation in format AMSBIB
\Bibitem{Mal19}
\by G.~A.~Malygin
\paper Mechanism of influence of nanocrystal sizes on the parameters of the curves of the pseudoelastic and thermoelastic deformations of alloys with the shape memory effect
\jour Fizika Tverdogo Tela
\yr 2019
\vol 61
\issue 2
\pages 288--295
\mathnet{http://mi.mathnet.ru/ftt8919}
\crossref{https://doi.org/10.21883/FTT.2019.02.47128.255}
\elib{https://elibrary.ru/item.asp?id=37478081}
\transl
\jour Phys. Solid State
\yr 2019
\vol 61
\issue 2
\pages 149--156
\crossref{https://doi.org/10.1134/S1063783419020173}
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  • https://www.mathnet.ru/eng/ftt/v61/i2/p288
  • This publication is cited in the following 4 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
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