Effects of Interstitial Content and Annealing on the Flow and Fracture Behavioron Polycrystalline Beta-NiAl

摘要

The strain behavior of three polycrystalline NiAl alloys has been investigated attemperatures between 300 and 1200 K. Yield stress plateaus, yield stress transients upon a ten-fold increase in strain rate, work hardening peaks, and dips in the strain rate sensitivity (SRS) have been observed between 700 and 800 K. These observations are indicative of dynamic strain aging (DSA) and are discussed in terms of conventional strain aging theories.