This article is cited in 6 papers

Strain localization during diametral compression of ZrO$_{2}$ (Y$_{2}$O$_{3}$) ceramics

I. N. Sevostyanova^a, T. Yu. Sablina^a, V. V. Gorbatenko^a, S. N. Kul'kov<sup>ab

a</sup> Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences
^b Tomsk State University

Abstract: Deformation behavior of ZrO$_{2}$–Y$_{2}$O$_{3}$ ceramics under conditions of diametral compression has been studied by method of digital image correlation. Spatiotemporal patterns of strain localization along the axis of a deformed sample ($\varepsilon_{xx}(x)$) and across this axis ($\varepsilon_{yy}(y)$) were obtained. It is established that the $\varepsilon_{xx}$ and $\varepsilon_{yy}$ deformations accumulated during the diametral compression test are inhomogeneously distributed over the sample. This is manifested by variation of the microstructure characteristics such as the size of the coherently diffracting domains of a tetragonal phase and microstresses and leads to the tetragonal–monoclinic phase transformation. This pattern of strain localization is correlated with the observed inhomogeneity of microstresses arising in the material volume.

Keywords: digital image correlation, diametral compression, zirconia, macroscopic strain localization, X-ray phase analysis.

Received: 05.03.2019
Revised: 05.03.2019
Accepted: 13.06.2019

DOI: 10.21883/PJTF.2019.18.48237.17766

 English version: Technical Physics Letters, 2019, 45:9, 943–946

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