Accession Number:

AD0266353

Title:

RESEARCH ON WORKABLE REFRACTORY ALLOYS OF TUNGSTEN, TANTALUM, MOLYBDENUM, AND COLUMBIUM

Descriptive Note:

Corporate Author:

CRUCIBLE STEEL CO OF AMERICA PITTSBURGH PA

Personal Author(s):

Report Date:

1961-05-01

Pagination or Media Count:

1.0

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

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE