DEVELOPMENT OF CHROMIUM COMPOSITE ALLOY WITH HIGH TEMPERATURE OXIDATION AND EROSION RESISTANCE
Final rept. for 1 Apr 1962-31 Mar 1963
BENDIX CORP SOUTH BEND IN BENDIX PRODUCTS DIV
Pagination or Media Count:
The effects of extrusion and rolling variables on the quality and mechanical behavior of a powder metallurgy chromium-magnesium oxide composite were studied. Hot rolling at 2200 F and finish rolling at 900 F with reductions of 40 to 55 provided sound, contamination free sheet having a ductile-brittle transition temperature of 45 F in the recrystallized condition. Oxidation, erosion and nitridation behavior were observed to be improved over unalloyed chromium. Preliminary studies indicated that a strain aging phenomenon may be responsible for the brittle behavior observed with as rolled and stress relieved sheets. Further work is required to resolve this anomaly. The results of this initial program indicated that the full potential of chromium composites can be realized additional development directed toward strengthening, and further retardation of nitrogen diffusion at elevated temperature.
- Organic Chemistry