THE EFFECT OF NITRIDING UPON THE CREEP PROPERTIES OF SOME MOLYBDENUM ALLOYS
Creep tests for 100 hr at temperatures between 950 and 1250 deg C were carried out on strip specimens of Mo-0.49% Ti, Mo-0.98% Ti, and Mo-1.5% Zr in both dispersionhardened and recrystallized conditions. The nitrided specimens had much longer creep lives and lower creep rates for the same stress and temperature compared with the nitrided Mo--Ti specimens, although the Mo--Zr alloy exhibited no steady-state creep. The activation energy and stress dependence of the creep rate were evaluated for the nitrided Mo-0.49% Ti alloy, and a metallographic and fractographic study was made of the tested specimens. The results are discussed in terms of current theories of creep in dispersion- hardened alloys. (auth)
- Research Organization:
- Oxford Univ.
- NSA Number:
- NSA-17-041461
- OSTI ID:
- 4699134
- Journal Information:
- J. Less-Common Metals, Journal Name: J. Less-Common Metals Vol. Vol: 5
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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