Interaction between elastic waves and prismatic dislocation loops

@article{Rodriguez2009InteractionBE,
  title={Interaction between elastic waves and prismatic dislocation loops},
  author={N. V. Rodriguez and Agn{\`e}s Maurel and Vincent Pagneux and Felipe Barra and Fernando Lund},
  journal={Journal of Applied Physics},
  year={2009},
  volume={106},
  pages={054910}
}
The properties of prismatic dislocation loops, generated by radiation in metals, have remained elusive for decades, and recent advances in computational capabilities as well as transmission electron microscopy have renewed interest in their study. Acoustic and elastic waves could become an interesting, nonintrusive, probe to this end, as they have for other dislocation configurations. What then are the characteristics of elastic wave scattering that would be sensitive to a prismatic loop… 

Figures from this paper

Scattering of phonons by quantum-dislocation segments in an elastic continuum
A canonical quantization procedure is applied to elastic waves interacting with pinned dislocation segments via the Peach-Koehler force. The interaction Hamiltonian, derived from an action principle
Nonperturbative Quantum Nature of the Dislocation-Phonon Interaction.
TLDR
A renormalized phonon naturally resolves the decade-long debate between dynamic and static dislocation-phonon scattering approaches, as two limiting cases, and remains valid by capturing the size effect, showing good agreement with lattice dynamics simulations.
The Use of Ultrasound to Measure Dislocation Density
Dislocations are at the heart of the plastic behavior of materials yet they are very difficult to probe experimentally. Lack of a practical nonintrusive measuring tool for, say, dislocation density,
situ measurement of microstructural changes in Aluminum under traction test : Linear and nonlinear analysis View project
Ultrasound has long been used as a non-destructive tool to test for the brittle fracture of materials. Could it be used as a similar tool to test for ductile failure? As a first step towards
Importance of dislocations in ultrasound-assisted sintering of silver nanoparticles
For acoustic softening of solid materials, it has been suggested that the enhancement of dislocation motion by ultrasonic irradiation plays some role. In order to study the role of dislocations in
Nonlocality of Dynamic Characteristics for Edge Dislocation Segment, Elastic Interaction of Dislocation with Pinning Points, and their Effect on Dislocation AIIF
In the present work, we studied dislocation amplitude-independent internal friction (AIIF) for segment of edge dislocation. Results obtained were compared with results of the Koehler-Granato-Lücke
...
1
2
...

References

SHOWING 1-10 OF 41 REFERENCES
Ultrasound as a Probe of Plasticity? The Interaction of Elastic Waves with dislocations
TLDR
These results explain a number of recent, hitherto unexplained, experimental findings on the interaction of elastic waves with dislocations.
Interaction between an elastic wave and a single pinned dislocation
Acoustic, and more generally elastic, waves in solids are damped by several mechanisms, among which dislocation motion is believed to play an important role. This is because an elastic wave interacts
Elastic wave propagation through a random array of dislocations
A number of unsolved issues in materials physics suggest there is a need for an improved quantitative understanding of the interaction between acoustic (more generally, elastic) waves and
Propagation of elastic waves through polycrystals: the effects of scattering from dislocation arrays
We address the problem of an elastic wave coherently propagating through a two-dimensional polycrystal. The main source of scattering is taken to be the interaction with grain boundaries that are in
Wave propagation through a random array of pinned dislocations: Velocity change and attenuation in a generalized Granato and Lücke theory
A quantitative theory of the elastic wave damping and velocity change due to interaction with dislocations is presented. It provides a firm theoretical basis and a generalization of the Granato and
Interaction of a surface wave with a dislocation
The scattering of a surface wave by a pinned edge dislocation in a semi-infinite, homogeneous, isotropic, three-dimensional elastic solid is investigated analytically and numerically. An incident
Multiple scattering from assemblies of dislocation walls in three dimensions. Application to propagation in polycrystals.
TLDR
At low frequencies, meaning wavelengths that are long compared to grain boundary size, then attenuation is found to scale with frequency following a law that is a linear combination of quadratic and quartic terms, in agreement with the results of recent experiments performed in copper.
Scattering of an elastic wave by a single dislocation
The scattering amplitude for the scattering of anti-plane shear waves by screw dislocations, and of in-plane shear and acoustic waves by edge dislocations are computed within the framework of
Investigation of dislocation loops associated with As–Sb nanoclusters in GaAs
A model is developed for the elastic stress relaxation via formation of prismatic dislocation loops in a vicinity of the As–Sb nanoclusters built in GaAs matrix. The model is based on the
...
1
2
3
4
5
...