RESEARCH AND DEVELOPMENT OF TANTALUM- AND TUNGSTEN-BASE ALLOYS
Final rept., 27 Jun 1958-26 Mar 1961
WESTINGHOUSE ELECTRIC CORP PITTSBURGH PA
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The effects of alloying upon the properties of Ta and W were examined. A 20-g button survey was made of the Ta-W-Hf and Ta-W-Re ternary systems to determine hardness, fabricability, oxidation resistance, and microstructure as a function of composition. The effects of substituting or adding Ti, Zr, V, Cb and Cr into Ta- and W-base alloys were also examined. A satisfactory technique was worked out for melting and fabrication of Ta-base alloys by arc melting from pressed and sintered electrodes and impact extruding at 1700 C with a Dynapak machine. The mechanical properties of the Ta-base alloys were determined from -320 F to 3000 F on 50 mil sheet specimens. The alloys in general possess a remarkable combination of excellent low temperature ductility and substantial high temperature strength.
- Properties of Metals and Alloys
- Fabrication Metallurgy