Evaluation of Oxide Dispersion Strengthened (ODS) Molybdenum Alloys
BETTIS ATOMIC POWER LAB WEST MIFFLIN PA
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A series of fourteen 14 novel high-strength molybdenum alloy compositions containing a dispersion of very fine 1 micron diameter oxide particles were consolidated using two proprietary powder metallurgy techniques. The developmental compositions were evaluated to determine the microstructural stability and mechanical properties from cryogenic -148 deg F to elevated temperatures 4000 deg F for material in the as-swaged 98 cold work condition and for as-swaged material in the heat treated condition. Extremely fine oxide particle sizes 1000 A were observed by Transmission Electron Microscopy TEM for a number of the experimental compositions in the as-swaged condition. A one hour recrystallization temperature as high as 3990 deg F was measured and a ductile-to-brittle transition temperature as low as -58 deg F for material in the recrystallized condition was determined. The preliminary results support the alloy design concept feasibility.
- Metallurgy and Metallography