Table 1 Summary of run conditions.

The total strain is the equivalent strain, εE, including both axial compression strain (εU) and shear strain (εS) as Embedded Image.

Run numberTemperature
(K)
Pressure
(GPa)
Total strain
(%)
Strain rate
(×10−5 s−1)
beta 74*2000 ± 10024.1 ± 0.5524.3
gamma 21*2130 ± 10027.0 ± 0.51003.0
gamma 222130 ± 10027.0 ± 0.555 ± 173.0 ± 0.9
gamma 23**2140 ± 10027.4 ± 0.500
gamma 242150 ± 10027.5 ± 0.523 ± 73.2 ± 1.0
gamma 252150 ± 10027.5 ± 0.548 ± 153.6 ± 1.1

*Strain marker was not visible in these runs. Strain was estimated from the angle of rotation of the anvil and the relationship between the angle of rotation and shear strain based on previous results. **After annealing, the furnace failed. No strain after annealing.