SHORT-TIME, HIGH-TEMPERATURE CREEP STRENGTH OF MOLYBDENUM-0.5% TITANIUM.
JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
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Short-time, high-temperature creep tests were conducted on a molybdenum-0.5 titanium alloy. Test samples were one-half inch wide x 0.060 inch thick molybdenum strip in the stress relieved condition. Prior to testing the samples were coated with a silicide oxidation resistant coating Pfaudler PFR-6. The tests were conducted at four stress levels ranging from a low of 8470 psi to a high of 20350 psi. Temperatures ranged from 2300F to 3000F. Time under load was in general less than 1000 seconds. The creep strength of this alloy was found to decrease very rapidly with increasing temperature at temperatures between 2300F and 2600F. At temperatures above 2600F strength decreased less rapidly with increasing temperature. This phenomenon is believed to be caused by recrystallization and grain growth at temperatures between 2300F and 2600F. At temperatures above 2600F recrystallization was essentially complete before the sample was loaded, approximately 15 seconds, resulting in less sensitivity to temperature in this range.
- Ceramics, Refractories and Glass
- Metallurgy and Metallography