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Creep and Stress Rupture Behavior of Ti-24Al-11Nb

Published online by Cambridge University Press:  01 January 1992

Wego Wang  and
Li-Tusng Chien
Wego Wang
Affiliation:
U.S. Army Research Laboratory, Materials Directorate, Watertown, MA 02172-0001, USA
Li-Tusng Chien
Affiliation:
Du Pont Taiwan Limited, Taiwan, ROC.
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Abstract

This work concerns the temperature and stress dependencies of the steady-state creep rate of a Ti-24Al-llNb 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 763
Copyright
Copyright © Materials Research Society 1995

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References

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