Misorientation distributions in hot deformed NaCl using electron backscattered diffraction

Noorden, Van

doi:10.1046/j.1365-2818.2000.00660.x

Cited by 1 publication

(2 citation statements)

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“…Pennock et al. (2005, 2002) observed that this also applies to halite and found a power‐law relationship between the mean subgrain misorientation and natural strain for relatively low finite strain (up ε = 0.54). Their results are in agreement with numerical simulations of Mika and Dawson (1999) and Gomez‐Rivas et al.…”

Section: Introductionmentioning

confidence: 96%

“…The amount of plastic strain correlates with the probability density of subgrain misorientation angles in polycrystalline aggregates in which dislocation creep is the dominant deformation mechanism (Hughes et al., 1998, 2003, 1997; Hughes & Hansen, 2018; Pennock & Drury, 2005; Pennock et al., 2002). A scaling behavior between the mean subgrain misorientation and finite strain was proposed based on metal deformation experiments (Hughes et al., 1997), and its physical origin was established by Pantleon (1997, 1998, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Full‐Field Numerical Simulation of Halite Dynamic Recrystallization From Subgrain Rotation to Grain Boundary Migration

Hao,

Llorens,

Griera

et al. 2023

JGR Solid Earth

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Full‐field numerical modeling is a useful method to gain understanding of rock salt deformation at multiple scales, but it is quite challenging due to the anisotropic and complex plastic behavior of halite, together with dynamic recrystallization processes. This contribution presents novel results of full‐field numerical simulations of coupled dislocation glide and dynamic recrystallization of halite polycrystalline aggregates during simple shear deformation, including both subgrain rotation and grain boundary migration (GBM) recrystallization. The results demonstrate that the numerical approach successfully replicates the evolution of pure halite microstructures from laboratory torsion deformation experiments at 100–300°C. Temperature determines the competition between (a) grain size reduction controlled by dislocation glide and subgrain rotation recrystallization (at low temperature) and (b) grain growth associated with GBM (at higher temperature), while the resulting crystallographic preferred orientations are similar for all cases. The relationship between subgrain misorientation and strain follows a power law relationship with a universal exponent of 2/3 at low strain. However, dynamic recrystallization causes a progressive deviation from this relationship when strain increases, as revealed by the skewness of the subgrain misorientation distribution. A systematic investigation of the subgrain misorientation evolution shows that strain or temperature prediction from microstructures requires careful calibration.

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Section: Introductionmentioning

confidence: 96%