Elastic wave propagation through polycrystals
Propagating elastic waves are commonly used to characterize nondestructively polycrystalline microstructure. To develop a fully quantitative characterization procedure, one needs a better understanding of what microstructural features most strongly influence the propagation and how these features appear in the measured, frequency dependent wave speed and attenuation. We report on our progress in a first principle investigation of these questions. We started with the equations of motion for elastic wave propagation and systematically developed a new approximation that is both well characterized and a potential improvement upon existing approximations. One of our objectives is studying the sensitivity of this approximation to changes in microstructural parameterization.
- Research Organization:
- Los Alamos National Lab., NM (USA); California Univ., Irvine (USA). Dept. of Physics
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6806231
- Report Number(s):
- LA-UR-84-2741; CONF-840738-2; ON: DE84016773
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420500* -- Engineering-- Materials Testing
656000 -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACOUSTIC TESTING
CRYSTAL STRUCTURE
CRYSTALS
MATERIALS TESTING
MICROSTRUCTURE
NONDESTRUCTIVE TESTING
POLYCRYSTALS
SOUND WAVES
TESTING
WAVE PROPAGATION