HIGH-TEMPERATURE MATERIALS PROGRAM. Progress Report No. 21, Part A, Jan. 1, 1963 to Feb. 15, 1963
Several creep-rupture stands which were used in the high-temperature alloy program are being modified for testing the refractory metals in an inert atmosphere. A test program to study the effects of irradiation on the refractory metals was established. Test specimens were fabricated with material on hand. Some preliminary irradiations and post-irradiation testing of tungsten and molybdenum were completed. Reactor time is being scheduled for the first phase of the refractory metals specimen irradiations. The remaining experiments required to complete the high-temperature alloy irradiations effects study were delineated. Structure studies are also continuing on this phase of the program. The damage patterns in bodycentered cubic systems are being studied with the use of high-speed electronic computers. The stress-rupture testing of molybdenum in hydrogen and argon at 2200 un. Concent 85% C was extended from 10 to 100 hours. Data obtained from the 100-hour tests are in agreement with values obtained by linearly extrapolating the data from the 10-hour life tests. The creep rates determined from these lowerstress, longer-life tests are consistent with those determined from the higher-stress, shorter-life tests. The Larson-Miller constant was determined for the molybdenum data at 2200 and 2400 un. Concent 85% C. These data compare well with that of other investigators working at 870, 980, and 1100 un. Concent 85% C. The mechanical property testing in neon previously planned was delayed. (auth)
- Research Organization:
- General Electric Co. Flight Propulsion Lab. Dept., Cincinnati
- DOE Contract Number:
- AT(40-1)-2847
- NSA Number:
- NSA-17-022093
- OSTI ID:
- 4693536
- Report Number(s):
- GEMP-21a
- Country of Publication:
- United States
- Language:
- English
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