Constitutive Model for Anisotropic Creep Behaviors of Single-Crystal Ni-Base Superalloys in the Low-Temperature, High-St
- PDF / 533,610 Bytes
- 9 Pages / 593.972 x 792 pts Page_size
- 8 Downloads / 180 Views
INTRODUCTION
SINGLE-crystal Ni-base superalloys have been an unbeatable choice for hot-section turbine blades because of their superior thermomechanical performance at increased temperatures compared with other high-temperature materials. It is generally understood that a large volume fraction of coherent cuboidal Ni3Al-base (L12) c0 -phase precipitates regularly distributed in a Ni-base solid solution c-phase matrix provides an excellent barrier against the motion of dislocations on thermomechanical loading. Experimental studies[1–7] show that the dislocation behavior in the c matrix and the c=c0 interface, and the stability of c0 precipitates vary depending on the temperature and stress, and they result in different creep behaviors for these alloys. Near-[0 0 1] orientation (
Data Loading...
