Investigation of Processing Microstructures and Properties of Oxide Dispersion Strengthened Cobalt Alloy Extruded Shapes.
Final technical rept. 1 Sep 74-31 Dec 76,
CABOT CORP KOKOMO IND STELLITE DIV
Pagination or Media Count:
The present study describes the development of an Oxide Dispersion Strengthened, Cobalt base alloy with the nominal composition of Co-20Ni-18Cr-4.5A1-1.75 Y2O3. The alloy was produced in extruded form from mechanically attrited powder. In the first part of this study a series of small scale 3in. dia. extrusions were produced in order to evaluate various compositional and processing parameters. Based upon this study a single powder composition and three sets of extrusion parameters were chosen for use with full scale 7in. diameter extrusion billets. Dynamic Mach 0.3, 2100 F oxidation tests showed the material to have excellent surface stability under these conditions, and hot corrosion testing at 1650 F showed it to be slightly superior to the analogous Ni base O.D.S. materials in this latter type of environment.
- Ceramics, Refractories and Glass
- Properties of Metals and Alloys
- Fabrication Metallurgy