Description
Laser-induced surface acoustic wave propagation along the surface and near-surface of materials have great advantages in detection and characterization of defects on and near the surface of materials based on the features of studied wave signals in different aspects. In out study, two features are studied to build relationship with the properties and defects of objective materials. First is the laser-induced surface acoustic wave dispersion due to various material properties such as Young’s modulus, Poisson’s ratio, thermal conductivity, thermal expansion, specific heat capacity, etc. Second is the interaction between the acoustic waves and the defects on or near the surface of materials during propagation. With the analysis of the scattered or transmitted propagation wave signals in the frequency domain, we can perform quantitative detection of defects.The joint of material properties determination from the MD (molecular dynamics) simulation of materials with point defects and finite element analysis (FEA) of the corresponding laser-induced surface acoustic waves (LSAW) is sufficiently applicable to our research object. MD simulation has the advantage in determining the property changes in irradiated (treated as point defects in this work) such as stiffness, thermal conduction, etc. while finite element method (FEM) can solve the thermo-elastic problems much faster.
| Period | 1 Dec 2017 |
|---|---|
| Held at | Materials Research Society (MRS) |
| Degree of Recognition | International |