Single crystal elastic constants of tungsten monocarbide

The elastic constants of single-crystal tungsten monocarbide were determined using high-frequency (20 to 50 mHz) ultrasonic pulse-echo measurements. The measured values are a full order of magnitude lower than the previously reported values estimated from X-ray elastic constants. The elastic modulus of polycrystalline WC was also measured to verify the accuracy of the ultrasonic method used. 10 ref.--AA