TITLE:
Sensitivity of Nanostructured Iron Metal on Ultrasonic Properties
AUTHORS:
Alok Kumar Gupta, Archana Gupta, Devraj Singh, Sudhanshu Tripathi
KEYWORDS:
Iron Metal, Elastic properties, Ultrasonic Attenuation
JOURNAL NAME:
Open Journal of Metal,
Vol.1 No.2,
December
29,
2011
ABSTRACT: The present investigation is focused on the influence of the nanocrystalline structure of pure iron metal on the ultrasonic properties in the temperature range 100 - 300 K. The ultrasonic attenuation due to phonon- phonon interaction and thermoelastic relaxation phenomena has been evaluated for longitudinal and shear waves along , and crystallographic directions. The second-and third-order elastic constants, ultrasonic velocities, thermal relaxation, anisotropy and acoustic coupling constants were also com- puted for the evaluation of ultrasonic attenuation in this temperature scale. The direction is most ap- propriate to study longitudinal sound waves, while , direction are best to propagate shear waves due to lowest values of attenuation in these directions. Other physical properties correlated with obtained results have been discussed.