|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Facile Measurements of Single-crystal Elastic Constant Tensor Properties from Polycrystalline Samples
||Xinpeng Du, Ji-Cheng Zhao
|On-Site Speaker (Planned)
Elastic constants are very important properties for practical applications of various classes of materials and also as essential input to physics/mechanism-based models for mechanical property predictions. Traditional methods of experimental measurements of elastic constants require single-crystal samples that are usually very laborious and difficult to grow. A method to measure single-crystal elastic constants from polycrystalline samples is developed. A model was first established to predict the surface acoustic wave (SAW) velocities along any arbitrary crystallographic orientation of any crystal symmetry. Ultrafast laser surface acoustics combined with electron backscatter diffraction (EBSD) were employed to measure the SAW velocities along several crystallographic directions of several grains of polycrystalline samples. Matching modeling predictions with orientation-dependent SAW velocities allows us to evaluate the elastic constants. Examples will be given to show the procedure and accuracy of such measurements.
||Planned: A print-only volume