Sound Scattering and Plasticity n Amorphous materials

Plastic deformation in amorphous materials results from a succession of local irreversible rearrangements at the nanometric scale known as Transformation Zones. From a numerical point of view, these Transformation Zones are well described within the theory of Eshelby inclusions. In this talk, we will compare sound scattering in amorphous materials in the presence of inclusions. We first remind the signature of structural disorder on acoustic attenuation. We will then detail the role of heterogeneous elastic inclusions on sound attenuation and thermal transfers. Finally we will focus on the effect of Eshelby like inclusions on sound attenuation.

[1] T. Albaret, A. Tanguy, F. Boioli and D. Rodney, Physical Review E 93, 053002-1-12 (2016): Mapping between atomistic simulations and Eshelby Inclusions in the shear deformation of an amorphous silicon model.
[2] Y. Beltukov, D. A. Parshin, V.M. Giordano and A. Tanguy, Physical Review E 98 023005 (2018): Propagative and diffusive regimes of acoustic damping in bulk amorphous material.
[3] Haoming Luo, Anthony Gravouil, Valentina Giordano and Anne Tanguy, Nanomaterials 9, 1471 (2019): Role of bi-phasic materials properties on Acoustic attenuation in a 2D nanophononic solid: the microscopic origin of the energy transport regime from propagative to localized.
[4] A. Tlili, V. Giordano, Y. Beltukov, P. Desmarchelier, S. Merabia and A. Tanguy Enhancement and anticipation of the Ioffe-Regel crossover in amorphous/nanocrystalline composites. to appear in Nanoscale (2019) DOI: 10.1039/c9nr03952j