Plastic Deformation by Grain Boundary Motion: Experiments and Simulations

Molodov, Dmitri A.

doi:10.1002/9783527652815.ch09

Cited by 8 publications

(7 citation statements)

References 88 publications

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“…One of the approaches to the evaluation of GB kinetics is to drive a GB by an applied shear stress and extract its mobility from the velocity-force relation [46,47]. The stressdriven GB motion is caused by the shear-coupling effect, in which normal displacements of a boundary are coupled to parallel translations of the grains [48][49][50][51][52][53]. The degree of coupling is characterized by the coupling coefficient [49][50][51] and experiments on Al bicrystals [53,54].…”

Section: Effect On Grain Boundary Motionmentioning

confidence: 99%

“…The latter has been done recently using the Cu R5ð210Þ½0 0 1 GB as a model. This boundary was previously found to couple according to the 1 1 0 h imode with a negative b [48][49][50][51][52][53]. The split-kite and filled-kite phases of this boundary were created in simulation blocks that did not contain sinks or sources of atoms, which precluded phase transformations.…”

Section: Effect On Grain Boundary Motionmentioning

confidence: 99%

See 1 more Smart Citation

Phase transformations at interfaces: Observations from atomistic modeling

Frolov

Asta

2016

Current Opinion in Solid State and Materials Science

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a b s t r a c tWe review the recent progress in theoretical understanding and atomistic computer simulations of phase transformations in materials interfaces, focusing on grain boundaries (GBs) in metallic systems. Recently developed simulation approaches enable the search and structural characterization of GB phases in single-component metals and binary alloys, calculation of thermodynamic properties of individual GB phases, and modeling of the effect of the GB phase transformations on GB kinetics. Atomistic simulations demonstrate that the GB transformations can be induced by varying the temperature, loading the GB with point defects, or varying the amount of solute segregation. The atomic-level understanding obtained from such simulations can provide input for further development of thermodynamics theories and continuous models of interface phase transformations while simultaneously serving as a testing ground for validation of theories and models. They can also help interpret and guide experimental work in this field.

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Section: Effect On Grain Boundary Motionmentioning

confidence: 99%

Section: Effect On Grain Boundary Motionmentioning

confidence: 99%

Phase transformations at interfaces: Observations from atomistic modeling

Frolov

Asta

2016

Current Opinion in Solid State and Materials Science

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“…An understanding of recrystallization textures is of industrial importance since the texture is responsible for the anisotropy in mechanical properties of the material, and will, in many cases, determine the properties of the product [25,29,30]. These properties will depend on whether the grains are randomly oriented or tend to have preferred crystallographic orientation [30].…”

Section: Introductionmentioning

confidence: 99%

“…These properties will depend on whether the grains are randomly oriented or tend to have preferred crystallographic orientation [30]. Orientation changes occur due to sliding on the most favorably oriented slip or twinning systems during deformation [25].…”

Section: Introductionmentioning

confidence: 99%

3D microstructural evolution of primary recrystallization and grain growth in cold rolled single-phase aluminum alloys

Adam

Zöllner

Field

2018

Modelling Simul. Mater. Sci. Eng.

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Modeling the microstructural evolution during recrystallization is a powerful tool for the profound understanding of alloy behavior and for use in optimizing engineering properties through annealing. In particular, the mechanical properties of metallic alloys are highly dependent upon evolved microstructure and texture from the softening process. In the present work, a Monte Carlo (MC) Potts model was used to model the primary recrystallization and grain growth in cold rolled single-phase Al alloy. The microstructural representation of two kinds of dislocation densities, statistically stored dislocations and geometrically necessary dislocations were quantified based on the ViscoPlastic Fast Fourier transform method. This representation was then introduced into the MC Potts model to identify the favorable sites for nucleation where orientation gradients and entanglements of dislocations are high. Additionally, in situ observations of non-isothermal microstructure evolution for singlephase aluminum alloy 1100 were made to validate the simulation. The influence of the texture inhomogeneity is analyzed from a theoretical point of view using an orientation distribution function for deformed and evolved texture.

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“…All of the model parameters used in this study are presented in Table 1. 15,17,19,21,24,[28][29][30][31][32][33][34][35][36][37][38][39][40] The dislocation density versus accumulated strain during HPT of Cu is calculated and presented in Fig. 2 (solid line).…”

Section: Resultsmentioning

confidence: 99%

Modelling the temperature rise effect through high-pressure torsion

Parvin

Kazeminezhad

2016

Materials Science and Technology

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An approach composed of the thermodynamics-based dislocation model and the Taylor theory is used to investigate the evolution of microstructure and flow stress during high-pressure torsion (HPT). The incremental temperature rise is considered through the modelling of HPT. The temperature can affect the annihilation of dislocations and thus the dislocation density. The model predicts the dislocation density, sub-grain size and flow stress during HPT. The modelling results are compared with the experimental data and the modelling results without considering the incremental temperature rise. A remarkable agreement is observed between the modelling results with considering the temperature rise effect and the experimental data.

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Plastic Deformation by Grain Boundary Motion: Experiments and Simulations

Cited by 8 publications

References 88 publications

Phase transformations at interfaces: Observations from atomistic modeling

Phase transformations at interfaces: Observations from atomistic modeling

3D microstructural evolution of primary recrystallization and grain growth in cold rolled single-phase aluminum alloys

Modelling the temperature rise effect through high-pressure torsion

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