Abstract
The propagation of ultrasonic waves in a polycrystalline aggregate is considered for a bulk sample with orthorhombic symmetry made of cubic crystals. Use is made of the Jaynes principle of maximum Shannon entropy to show how information about the crystallite orientation distribution function can be derived from ultrasonic velocity measurements. It is shown that such information may be derived from ultrasonic velocity measurements both immediately, and after calculating the effective Young modulus in the respective direction. The results obtained from the ultrasonic velocity measurements are compared with those obtained from neutron diffraction measurements.
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