Elastic parameters of single crystal ZrO alloys

The elastic moduli of alpha single crystal ziconium containing up to 24 at.% oxygen have been determined in the temperature range 250–520°K using an ultrasonic technique based on the phase comparison technique of McSkimin. The effect of oxygen in solid solution is shown as an increase in the values of the elastic parameters of zirconium; however, the variations in the temperature range studied follow those of the unalloyed zirconium. Using the single crystal data, the values of the technical elastic moduli at room temperature were derived and compared with actual measurements made on commercial crystal-bar polycrystalline zirconium. In agreement with a similar analysis by Fisher and Renken, the measured and calculated values for unalloyed zirconium corresponded surprisingly well.