Fernando Lund
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View article: Acoustic Assessment of Microstructural Deformation Mechanisms on a Cold Rolled Cu30Zn Brass
Acoustic Assessment of Microstructural Deformation Mechanisms on a Cold Rolled Cu30Zn Brass Open
The relationship between acoustic parameters and the microstructure of a Cu30Zn brass plate subjected to plastic deformation was evaluated. The plate, previously annealed at 550 °C for 30 min, was cold rolled to reductions ranging from 10%…
View article: Correlation between microstructural deformation mechanisms and acoustic parameters on a cold-rolled Cu30Zn brass
Correlation between microstructural deformation mechanisms and acoustic parameters on a cold-rolled Cu30Zn brass Open
The relationship between acoustic parameters and the microstructure of a Cu30Zn brass plate subjected to plastic deformation was evaluated. The plate, previously annealed at 550 °C for 30 minutes, was cold rolled to reductions in the 10-70…
View article: Nonlinear acoustic characterization of heterogeneous plasticity in bent aluminium samples
Nonlinear acoustic characterization of heterogeneous plasticity in bent aluminium samples Open
Knowledge of the state of plastic deformation in metallic structures is vital to prevent failure. This is why non-destructive acoustic tests based on the measurement of first order elastic constants have been developed and intensively used…
View article: Diffusion of elastic waves in a continuum solid with a random array of pinned dislocations
Diffusion of elastic waves in a continuum solid with a random array of pinned dislocations Open
The propagation of incoherent elastic energy in a three-dimensional solid due to the scattering by many, randomly placed and oriented, pinned dislocation segments, is considered in a continuum mechanics framework. The scattering mechanism …
View article: Preparation of osteoinductive – Antimicrobial nanocomposite scaffolds based on poly (D,L-lactide-co-glycolide) modified with copper – Doped bioactive glass nanoparticles
Preparation of osteoinductive – Antimicrobial nanocomposite scaffolds based on poly (D,L-lactide-co-glycolide) modified with copper – Doped bioactive glass nanoparticles Open
The aim of this study was to explore the preparation of porous nanocomposite scaffolds with simultaneous osteogenic – antibacterial properties by incorporating copper – doped bioactive glass nanoparticles into Poly (D,L-lactide-co-glycolid…
View article: The Scattering of Phonons by Infinitely Long Quantum Dislocations Segments and the Generation of Thermal Transport Anisotropy in a Solid Threaded by Many Parallel Dislocations
The Scattering of Phonons by Infinitely Long Quantum Dislocations Segments and the Generation of Thermal Transport Anisotropy in a Solid Threaded by Many Parallel Dislocations Open
A canonical quantization procedure is applied to the interaction of elastic waves—phonons—with infinitely long dislocations that can oscillate about an equilibrium, straight line, configuration. The interaction is implemented through the w…
View article: Elastic anomalies in glasses: Elastic string theory understanding of the cases of glycerol and silica
Elastic anomalies in glasses: Elastic string theory understanding of the cases of glycerol and silica Open
We present an implementation of the analytical string theory recently applied\nto the description of glasses. These are modeled as continuum media with\nembedded elastic string heterogeneities, randomly located and randomly\noriented, whic…
View article: Scattering of phonons by quantum-dislocation segments in an elastic continuum
Scattering of phonons by quantum-dislocation segments in an elastic continuum Open
© 2019 American Physical Society.A canonical quantization procedure is applied to elastic waves interacting with pinned dislocation segments ("strings") of length L via the Peach-Koehler force. The interaction Hamiltonian, derived from an …
View article: Linear Versus Nonlinear Acoustic Probing of Plasticity in Metals: A Quantitative Assessment
Linear Versus Nonlinear Acoustic Probing of Plasticity in Metals: A Quantitative Assessment Open
The relative dislocation density of aluminum and copper samples is quantitatively measured using linear Resonant Ultrasound Spectroscopy (RUS). For each metallic group, four samples were prepared with different thermomechanical treatments …
View article: Linear Versus Nonlinear Acoustic Probing of Plasticity in Metals: A Quantitative Assessment
Linear Versus Nonlinear Acoustic Probing of Plasticity in Metals: A Quantitative Assessment Open
The relative dislocation density of aluminum and copper samples is quantitatively measured using linear Resonant Ultrasound Spectroscopy (RUS). For each metallic group, four samples were prepared with different thermomechanical treatments …
View article: Strain rate and temperature effect on Zr<sub>50</sub>Cu<sub>50</sub> metallic glass under pure shear
Strain rate and temperature effect on Zr<sub>50</sub>Cu<sub>50</sub> metallic glass under pure shear Open
We present a molecular dynamics study of the mechanical properties of Zr50Cu50 glass under pure shear. The samples have 145.200 atoms with dimensions of 40 × 20 × 2 nm in the x, y and z directions, respectively. After quenching, we obtain …
View article: Diffusion of elastic waves in a two dimensional continuum with a random\n distribution of screw dislocations
Diffusion of elastic waves in a two dimensional continuum with a random\n distribution of screw dislocations Open
We study the diffusion of anti-plane elastic waves in a two dimensional\ncontinuum by many, randomly placed, screw dislocations. Building on a\npreviously developed theory for coherent propagation of such waves, the\nincoherent behavior is…