Abstract
This work concerns the temperature and stress dependencies of the steady-state creep rate of a Ti-24Al-11Nb alloy in the temperature range between 593 and 760°C (1,100 and 1,400°F) and stress levels 137.9 to 275.8 MPa (20 to 40 ksi). Tests were conducted on both as-extruded and heat-treated specimens. A transition occurs in the creep curves at 704°C (1,300°F) and 206.9 MPa (30 ksi), indicating a creep mechanism change. Generally speaking, the fracture surface of as-extruded specimens shows a ductile transgranular fracture mechanism; a more ductile fracture mode is observed for heat-treated specimens.
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References
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Acknowledgments
The authors wish to express their appreciation to Nuclear Metals, Inc. for providing the experimental material and Northeastern University for conducting the experiments.
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Wang, W., Chien, LT. Creep and Stress Rupture Behavior of Ti-24Al-11Nb. MRS Online Proceedings Library 288, 763–768 (1992). https://doi.org/10.1557/PROC-288-763
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DOI: https://doi.org/10.1557/PROC-288-763