Primary creep of Ni3(Al, Ta) in the anomalous flow regime

The primary creep behavior of single-slip oriented Ni3(Al, Ta) has been characterized at low temperatures in the anomalous flow regime. For temperatures ranging from 20 to 200 °C, transient creep leading to eventual exhaustion has been measured at all stresses. The decline in the creep rate has been quantitatively shown to occur more quickly than in common metals, as the decline in the creep rate is faster than predicted by the logarithmic creep law. In addition, the temperature dependence of the primary creep behavior is consistent with the flow stress anomaly, as the measured amount of creep strain at a fixed stress decreases with increasing temperature.