DEVELOPMENT OF A DUCTILE TUNGSTEN SHEET ALLOY
Abstract
Separate binary-alloy studies showed that increasing amounts of finely dispersed ThO2 or ZrO2 and critical amounts of Re, Os, and Ir were effective in significantly reducing the ductile-to-brittle bend transition temperature of W as well as in increasing its recrystallization temperature and decreasing its recrystallized grain size. Selected ternary alloys of Re, Os, or Ir with ThO2 were then prepared. The beneficial effects shown by each of these additions on transition temperature and grain size in binary combinations appeared to be additive. Thus, combined additions of 2 to 8 volume per cent ThO2 with 5 per cent Re, 0.87 per cent Os, or 0.30 per cent Ir were effective in lowering the transition temperature of W from 200 C to 75 to 85 C, increasing its recrystallization temperature from 1600 C to 1800 C, and decreasing its recrystallized grain size.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 26, 1962
- Accession Number
- AD0277459
Entities
People
- D. J. Maykuth
- H. R. Ogden
- J. L. Ratliff
- Robert Isaac Jaffee
Organizations
- Battelle Memorial Institute