Primary creep of Ni-3(Al, Ta) in the anomalous flow regime

The primary creep behavior of single-slip oriented Ni-3(Al, Ta) has been ch aracterized at low temperatures in the anomalous flow regime. For temperatu res ranging from 20 to 200 degreesC, transient creep leading to eventual ex haustion has been measured at all stresses. The decline in the creep rate h as been quantitatively shown to occur more quickly than in common metals, a s the decline in the creep rate is faster than predicted by the logarithmic creep law. In addition, the temperature dependence of the primary creep be havior is consistent with the flow stress anomaly, as the measured amount o f creep strain at a fixed stress decreases with increasing temperature. Pub lished by Elsevier Science Ltd.