Study of high temperature inner pressure creep property of Mo-3Nb alloy single crystal

Biaxial load was applied on the tube specimen by the inert gases medium, the inner pressure creep property of domestic Mo-3Nb alloy single crystal were studied. Up to now, the creep experiment has been done at 1600 °C for 3000 hours under three kinds of hoop stress. The three kinds of hoop strees is 5MPa,10 MPa and 15 MPa. Ultimately the creep curves under different conditions were obtained. The steady-state creep rate and the stress exponent in the Sherby-Dorn function have been deduced out. The stress exponent of Mo-3Nb is 5.4. Compare with the Russian single crystal, the creep property is close to Russian's.