|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Determining Bulk Elastic Properties of Transversely Isotropic Aluminum Using Resonant Ultrasound Spectroscopy
||Jordan A. Evans, Blake T. Sturtevant, Fedor F. Balakirev, Albert Migliori, Boris Maiorov
|On-Site Speaker (Planned)
||Jordan A. Evans
Materials can have complex anisotropic mechanical properties depending on texture. In this study, samples with identical thermomechanical histories were machined from an extruded rod of aluminum alloy 1100-O in different orientations with respect to the rod axis. The samples’ elastic wave resonance frequencies were measured using resonant ultrasound spectroscopy (RUS). These resonances were used to (a) identify the orientation of the transversely isotropic axis due to texture from extrusion, and (b) quantify the degree of anisotropy by determining the entire elastic tensor of each sample (5 independent elastic constants) with one non-destructive RUS measurement. The anisotropy of the compressive (c11 vs. c33) and shear (c44 vs. c66) elastic constants are 0.72% ± 0.54% and 5.06% ± 0.50%, respectively, where c33 and c66 are the elastic constants associated with the textured axis. Anisotropic properties were confirmed by direct sound velocity measurements using the ultrasonic pulse-echo technique.