Materials physics, especially mechanical properties.

The figure on the right shows the interference pattern between an elastic wave that is incident upon a dislocation, and the wave that is scattered by said dislocation within a continuous elastic medium. The detailed understanding of this phenomenon is part of a program that aims at developing predictive quantitative models for the plastic behavior of metals and alloys.

The theoretical description of these phenomena has been developed in collaboration with F. Barra (DFI), A. Maurel (ESPCI, Paris, Francia) and V. Pagneux (LAUM, Le Mans, Francia), among others. N. Mujica (DFI) has developed Resonant Ultrasound Spectroscopy (RUS) experiments. A. Zuniga (DIMec) and R. Espinoza (DCM) perform High Resolution Transmission Electron Microscopy (HRTEM) as well as X-ray diffraction (XRD)  measurements as part of the results validation process.

• A. Maurel, V. Pagneux, F. Barra, and Lund, F., “Reply to Comment on Interaction of a Surface Wave with a dislocation”, Phys. Rev. B 80, 136102 (2009).
• A. Maurel, V. Pagneux, F Barra, F., and Lund, F., “Surface acoustic waves in interaction with a dislocation”, Ultrasonics (in press).
• N. Rodríguez, A. Maurel, V. Pagneux, F. Barra and F. Lund, “Interaction between elastic waves and prismatic dislocation loops”, J. Appl. Phys. 106, 054910 (2009).
• F. Barra, A. Caru, M. T. Cerda, R. Espinoza, A. Jara, F. Lund and N. Mujica, “Measuring dislocation density in aluminum with resonant ultrasound spectroscopy”, Int. J. Bifurc. Chaos 19, 3561 (2009).
• A. Maurel, V. Pagneux, F. Barra and F. Lund, “Ultrasound as a probe of plasticity? The interaction of elastic waves with dislocations” Int. J. Bifurc. Chaos 19, 2765 (2009).
• A. Maurel, V. Pagneux, F. Barra and F. Lund, “Interaction of a surface wave with a dislocation” Phys. Rev. B 75, 224112 (2007).
• A. Maurel, V. Pagneux, F. Barra and F. Lund, “Multiple scattering from assemblies of dislocation walls in three dimensions. Application to propagation in polycrystals”, J. Acoust. Soc. Am. 121, 3418 (2007).
• A. Maurel, V. Pagneux, F. Barra and F. Lund, “Wave propagation through a ran­dom array of pinned dislocations: Velocity change and attenuation in a generalized Granato and L¨ucke theory”, Phys. Rev. B 72, 174111 (2005).
• A. Maurel, V. Pagneux, F. Barra and F. Lund, “Interaction between an elastic wave and a single pinned dislocation”, Phys. Rev. B 72, 174110 (2005).
• A. Maurel, V. Pagneux, D. Boyer and F. Lund, “Elastic wave propagation through a distribution of dislocations”, Mater. Sc. Engin. A 400-401, 222 (2005).
• A. Maurel, J.-F. Mercier and F. Lund, “Elastic wave propagation through a random array of dislocations”, Phys. Rev. B 70, 024303 (2004).
• A. Maurel, J.-F. Mercier and F. Lund, “Scattering of an elastic wave by a point dislocation”, J. Acoust. Soc. Am. 115, 2773 (2004).
• F. Petrelis and F. Lund, “On the scattering of sound by a magnetic field in an MHD fluid”, Eur. Phys. J. B 35, 291 (2003).
• F. Lund, “Sound vortex interaction in infinite media”, in Sound-Flow Interaction, edited by Y. Aur´egan, A. Maurel, V. Pagneux and J.-F. Pinton, Lecture Notes in Physics 586 (Springer-Verlag, 2002).
• R. Bernal, C. Coste, F. Lund and F. Melo, “Normal mode vortex interactions”, Phys. Rev. Lett. 89, 034501 (2002).