RESEARCH ON WORKABLE REFRACTORY ALLOYS OF TUNGSTEN, TANTALUM, MOLYBDENUM, AND COLUMBIUM
Abstract
Studies were made to determine the potential of the W- and Ta-rich alloys of the W-Ta-Mo-Nb system for high-strength structural applications at temperatures above 2500 F. Twenty specific compositions, including binary, ternary, nd quaternary alloys were investigated. Creep and tension tests were conducted on the as-extruded samples at 3000 F in vacuum. The high-temperature strength of the W-rich alloys increased with the addition of Nb, and the high-temperature strength of the Ta-rich alloys increased with additions of Mo and W. 88.6 W - 5.7 Mo - 5.7 Nb alloy had a tensile strength of 62,000 psi at 3000 F; several alloy had tensile strengths in excess of 50,000 psi. These strengths were attained by a combination of solid-solution strengthening and strain hardening. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0266353